CCNA_final2标准答案

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CCNAFinal2 完全答案:请参见图示。

对于发往192.16820的数据包，R2会采取什么操作？A 、它会丢弃数据包。

B、它会经过S0/0/0 接口转发数据包。

C、它会经过Fa0/0 接口转发数据包。

D、它会将数据包转发给R1 。

答案: D2请参见图示。

R1会使用哪一总结地址来向R2通告其网络？A、192.168.1.0/24B、192.168.0.0/24C、192.168.0.0/22D、192.168.1.0/22答案: C3请参见图示。

尽管R2已配置正确，但主机A还是无法访问In ternet。

能够在R1上配置哪两条可让主机A访问In ternet的静态路由？（选择两项。

）A、iproute0.0.0.00.0.0.0Fa0/0B、iproute0.0.0.00.0.0.0Fa0/1C、iproute0.0.0.00.0.0.010.1.1.1D、iproute0.0.0.00.0.0.010.1.1.2E、iproute209.165.202.0255.255.255.010.1.1.1 答案: BD4请参见图示。

网络管理员已按图示配置了R1, 而且所有接口都运作正常。

但从R1ping172.16.1.1 时失败。

造成此问题的原因可能是什么?A、R1 上的串行接口配置有误。

B、默认路由配置有误。

C、必须在R1 上发出default-informationoriginate 命令。

D、必须在R1 上禁用自动总结。

答案: B5请参见图示。

所有接口都已编址, 而且运行正常。

网络管理员在主机A上运行了tracert命令。

得到这种输出的原因可能是什么？（选择两项。

）A、主机A 缺少网关或配置不正确。

B、主机B 缺少网关或配置不正确。

C、R1的路由表中缺少192.168.1.0/24的条目D 、 R2 的路由表中缺少192.168.1.0/24 的条目。

E 、 R1 的路由表中缺少 192.168.2.0/24 的条目。

ccna第二章练习答案.docx

yy1 ・ Refer to the exhibit・ Identify the devices labeled A, B, C, and D in the network physical documentation. 匚A=bridge, B=switch, C=router, D=hubK A=bridge, B=hub, C=router, D=switchC A=bridge, B=router, C=hub, D=switchc A=hub, B=bridge, C=router, D=switch2 The central hub has malfunctioned in the network. As a result, the entire network is down. Which type of physical network topology is implemented?匚busE starC ring匚mesh3. A switch has failed in the network. As a result, only one segment of the network is down. Which type of physical network topology is implemented?C busC ring匚starE extended star4. Which three features apply to LAN connections? (Choose three.)厂operate using serial in terfacesV make network connection using a hubV limited to operation over small geographic areas厂 provide part-time connectivity to remote servicesV typically operate under local administrative control厂provide lower bandwidth services compared to WANs5. What is one advantage of defining network communication by the seven layers of the OSI model? 【:It in creases the ban dwidth of a n etwork.E It makes networking easier to learn and understand・It eliminates many protocol restrictions.匚It increases the throughput of a network.c It reduces the need for testing network connectivity.6. What makes it easier for different networking vendors to design software and hardware that willin teroperate?E OSI modelc proprietary desig ns匚IP addressing schemec standard logical topologies匚standard physical topologies7. Which term describes the process of adding headers to data as it moves down OSI layers?匚division匚encoding匚separation匚segmentationE encapsulation8. What is the term used to describe the transport layer protocol data unit?匚bits c packetsE segments匚framesc data streams9. Which of the following are layers of the TCP/IP model? (Choose three.)▽ Applicati onr PhysicalV Internet0 Network Access厂Prese ntation10. Which of the following are data link layer encapsulation details? (Choose two.)0 A header and trailer are added・厂Data is con verted into packets ・V Packets are packaged into frames・厂Frames are divided into segments.厂Packets are changed into bits for Internet travel.11. Which layer of the OSI model provides network services to processes in electronic mail and file transfer programs?匚data link匚transport匚n etworkE application12. Which two features apply to WAN connections? (Choose two.)V operate using serial interfacesP make network connection using a hub厂limited to operation over small geographic areasI- typically operate under local administrative control▽provide lower bandwidth services compared to LANs13. Which of the following are ways that bandwidth is commonly measured? (Choose three.)厂GHzps▽kbpsV Mbps厂Nbps厂MHzpsV Gbps14. Refer to the following list. Choose the correct order of data encapsulation when a device sends information. segments bits packetsdata frames匚1 -3-5-4-2C 2- 1-3-5-4C 2-4-3-5-1匚4-3-1-2-5E 4-1 -3-5-2C 3-5-1-2-415. Which of the following are factors that determine throughput? (Choose two.)厂types of passwords used on servers厂type of Layer 3 protocol usedV n etwork topologywidth of the network cable0 number of users on the network16. Refer to the exhibit・ Which column shows the correct sequenee of OSI model layers?E D17. Which layer of the OSI model provides connectivity and path selection between two end systems where routing occurs?c physical layer匚data link layerE network layer匚transport layer18. Which best describes the function of the physical layer?E Defines the electrical and functional specifications for the link between end systems・匚Provides reliable transit of data across a physical link.匚Provides connectivity and path selection between two end systems・匚Concerned with physical addressing, network topology and media access.。

CCNA2 题库

CCNA 2 - Chapter 11What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?has a positive impact on bandwidth by dropping most of the invalid framesmakes a fast forwarding decision based on the source MAC address of the framehas a lower latency appropriate for high-performance computing applications*provides the flexibility to support any mix of Ethernet speeds2A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)reduced cost for equipment and user trainingless required equipment to provide the same performance levelssimpler deployment for additional switch equipment*easier to provide redundant links to ensure higher availability*lower bandwidth requirements3What are two advantages of modular switches over fixed-configuration switches? (Choose two.)availability of multiple ports for bandwidth aggregationlower forwarding ratesneed for fewer power outlets*lower cost per switchincreased scalability*4Refer to the exhibit. Consider that the main power has just been restored. PC1 asks the DHCP server for IPv4 addressing. The DHCP server sends it an IPv4 address. While PC2 is still booting up, PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request?to Fa0/1, Fa0/2, and Fa0/4 onlyto Fa0/1, Fa0/2, Fa0/3, and Fa0/4to Fa0/1 and Fa0/2 onlyto Fa0/1, Fa0/2, and Fa0/3 only*to Fa0/1 only5What is one function of a Layer 2 switch?forwards data based on logical addressinglearns the port assigned to a host by examining the destination MAC addressduplicates the electrical signal of each frame to every portdetermines which interface is used to forward a frame based on the destination MAC address*6Refer to the exhibit. Fill in the blank.There are ” 12” collision domains in the topology.7What is a collapsed core in a network design?a combination of the functionality of the access, distribution, and core layersa combination of the functionality of the access and core layersa combination of the functionality of the distribution and core layers*a combination of the functionality of the access and distribution layers 8What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)to enhance user bandwidth*to eliminate virtual circuitsto create more broadcast domainsto isolate traffic between segments*to isolate ARP request messages from the rest of the networkto create fewer collision domains9Refer to the exhibit.How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?SW1 forwards the frame directly to SW2. SW2 floods the frame to all ports connected to SW2, excluding the port through which the frame entered the switch.SW1 floods the frame on all ports on the switch, excluding the interconnected port to switch SW2 and the port through which the frame entered the switch.SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.*SW1 drops the frame because it does not know the destination MAC address.10Place the options in the following order:[+] appropriate for high performance computing applications[+] forwarding process can begin after receiving the destination address [+] may forward invalid frames[#] error checking before forwarding[#] forwarding process only begin after receiving the entire frame [#] only forward valid frames[+] Order does not matter within this group.[#] Order does not matter within this group.11What is a basic function of the Cisco Borderless Architecture distribution layer?aggregating Layer 3 routing boundaries*aggregating all the campus blocksacting as a backboneproviding access to the user12ABC, Inc. has about fifty hosts in one LAN. The administrator would like to increase the throughput of that LAN. Which device will increase the number of collision domains and thereby increase the throughput of the LAN?hubhostNICswitch*13What does the term “port density” represent for an Ethernet switch?the numbers of hosts that are connected to each switch portthe speed of each portthe memory space that is allocated to each switch portthe number of available ports*14Which type of transmission does a switch use when the destination MAC address is not contained in the MAC address table?anycastunicastbroadcast*multicast15What is a basic function of the Cisco Borderless Architecture access layer?aggregates Layer 3 routing boundariesprovides high availabilityaggregates Layer 2 broadcast domainsprovides access to the user*16What information is added to the switch table from incoming frames?source MAC address and incoming port number*destination MAC address and incoming port numberdestination IP address and incoming port numbersource IP address and incoming port number17Fill in the blank.A “converged” network is one that uses the same infrastructure to carry voice, data, and video signals.18An administrator purchases new Cisco switches that have a feature called StackPower. What is the purpose of this feature?It enables many switches to be connected with a special fiber-optic power cable to provide higher bandwidth.It enables the sharing of power among multiple stackable switches.*It enables many switches to be connected to increase port density.It enables many switches to be physically stacked in an equipment rack.It enables AC power for a switch to be provided from a powered patch panel.19Which switch form factor should be used when large port density, fault tolerance, and low price are important factors?fixed-configuration switchmodular switchstackable switch*rackable 1U switch20Refer to the exhibit. Fill in the blank.There are ” 5 ”CCNA 2 - Chapter 2Posted by beotron at 8:59 PM1. A static route that points to the next hop IP will have what administrative distance and metric in the routing table?• administrative distance of 0 and metric of 0• administrative distance of 0 and metric of 1• administrative distance of 1 and metric of 0• administrative distance of 1 and metric of 12. What address can be used to summarize networks 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24, and 172.16.4.0/24?• 172.16.0.0/21• 172.16.1.0/22• 172.16.0.0 255.255.255.248• 172.16.0.0 255.255.252.03. The routers in the diagram use the subnet assignments shown. What is the most efficient route summary that can be configured on Router3 to advertise the internal networks to the cloud?• 192.1.1.0/26 and 192.1.1.64/27• 192.1.1.128/25• 192.1.1.0/23 and 192.1.1.64/23• 192.1.1.0/24• 192.1.1.0/25• 192.1.1.0/24 and 192.1.1.64/244. Refer to the exhibit. What is the significance of the /8 in the route to the 10.0.0.0 network?• It indicates that there are 8 hops between this router and the 10.0.0.0 network.• It represents the time, in milliseconds, it takes for a ping to reply when sent to the 10.0.0.0 network.• It indicates that there are 8 subnets in the destination network to which the router can forward packets.• It indicates the number of consecutive bits, from the left, in the destination IP address of a packet that must match 10.0.0.0 to use that route.5. Refer to the exhibit. How will packets destined to the 172.16.0.0 network be forwarded?• Router1 will perform recursive lookup and packet will exit S0/0.• Router1 will perform recursive lookup and packet will exit S0/1.• There is no matching interface associated with network 172.16.0.0 so packets will be dropped.• There is no matching interface associated with network 172.16.0.0 so packets will take gateway of last resort and exit out S0/2.6. A network administrator enters the following command into Router1: ip route 192.168.0.0255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet? • drops the packet because the destination host is not listed in the routing table• looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame• performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet• encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface7. Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link? • The rate would be negotiated by both routers.• A rate would not be selected due to the DCE/DTE connection mismatch.• The rate configured on the DTE determines the clock rate.• The rate configured on the DCE determines the clock rate.8. Refer to the exhibit. Which set of commands will configure static routes that will allow the WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other traffic to the Internet? • WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1• WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2Altamonte(config)# ip route 198.18.222.0 255.255.255.255 s0/1• WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1• WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2• WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/09. Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)• ping• show arp• traceroute• show ip route• show interface• show cdp neighbor d etail10. Refer to the exhibit. A company network engineer is assigned to establish connectivity between the two Ethernet networks so that hosts on the 10.1.1.0/24 subnet can contact hosts on the 10.1.2.0/24 subnet. The engineer has been told to use only static routing for these company routers. Which set of commands will establish connectivity between the two Ethernet networks?• R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2• R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1• R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1• R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2• R1(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.1R2(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.111. Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.) • load• platform• reliability• holdtime• local interface12. Refer to the exhibit. What two commands are required to provide connectivity between the192.168.1.0 and 10.0.0.0 networks without requiring recursive lookup? (Choose two.)• A(config)# ip route 10.0.0.0 255.0.0.0 s 0/1/0• A(config)# ip route 10.0.0.0 255.0.0.0 172.16.40.2• A (config)# ip route 10.0.0.0 255.0.0.0 s 0/0/0• B(config)# ip route 192.168.1.0 255.255.255.0 s 0/0/0• B (config)# ip route 192.168.1.0 255.255.255.0 172.16.40.1• B(config)# ip route 192.168.1.0 255.255.255.0 s 0/1/013. Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)• A(config)# no network 10.0.0.0 255.0.0.0 172.16.40.2• A(config)# no ip address 10.0.0.1 255.0.0.0 172.16.40.2• A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2• A(config)# ip route 10.0.0.0 255.0.0.0 s0/0/0• A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.214. What happens to a static route entry in a routing table when the outgoing interface is not available? • The route is removed from the table.• The router polls neighbors for a replacement route.• The route remains in the table because it was defined as static.• The router redirects the static route to compensate for the loss of the next hop device.15. A router has one static route to each destination network. Which two scenarios would require an administrator to alter the static routes that are configured on that router? (Choose two.)• The destination network no longer exists.• The destination network is moved to a different interface on the same router.• The path between the source and destination is upgraded with a higher bandwidth link.• A topology change occurs where the exi sting next-hop address or exit interface is not accessible.• The remote destination network interface has to be down for 15 minutes of maintenance.16. Why is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet network?• Adding the next-hop address eliminates the need for the router to do any lookups in the routing table before forwarding a packet.• In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address.• Using a next-hop address in a static route provides a route with a lower metric.• In multi-access networks, using a next-hop address in a static route makes that route a candidate default route.17. The output of the Router# show interfaces serial 0/1 command displays the following:• Serial0/1 is up, line protocol is down.• What is the most likely cause for the line protocol being down?• Serial0/1 is shutdown.• There is no cable connecting the routers.• The remote rout er is using serial 0/0.• No clock rate has been set.18. Refer to the exhibit. Which static route should be configured on Router1 so that host A will be able to reach host B on the 172.16.0.0 network?• ip route 192.168.0.0 172.16.0.0 255.255.0.0• ip rou te 172.16.0.0 255.255.0.0 192.168.0.1• ip route 172.16.0.0 255.255.0.0 S0/0/1• ip route 172.16.0.0 255.255.0.0 S0/0/019. What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).• the serial port of the router• a modem• a switch• the ethernet port of the router• a CSU/DSU device• a DTE device20. Which of the following is true regarding CDP and the graphic shown?• CDP running on Router D will gather information about routers A, B, C, and E.• By default, Router A will receive CDP advertisements from routers B and C.• If routers D and E are running different routing protocols, they will not exchange CDP information.• Router E can use CDP to identify the IOS running on Router B.21. Which two statements describe functions or characteristics of CDP? (Choose two.)• It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.• It operates at the network layer and allows two systems to learn about each other.• It creates a topology map of the entire network.• It allows systems to learn about each other even if different network layer protocols are configured.• It forwards advertisements about routes for faster convergence.22. Which piece of information is available from examining the output of the command show ip interface brief?• Interface speed and duplex• Interface MTU• Errors• Interface MAC address• Interface IP addressCCNA 2 - Chapter 31A network administrator is determining the best placement of VLAN trunklinks. Which two types of point-to-point connections utilize VLAN trunking? (Choose two.)between two switches that share a common VLANbetween a switch and a server that has an 802.1Q NIC*between a switch and a client PCbetween a switch and a network printerbetween two switches that utilize multiple VLANs*2What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?The port automatically associates itself with the native VLAN. The port creates the VLAN again.The port goes back to the default VLAN.The port becomes inactive.*3Refer to the exhibit. Interface Fa0/1 is connected to a PC. Fa0/2 is a trunk link to another switch. All other ports are unused. Which security best practice did the administrator forget to configure?Configure all unused ports to a ‘black-hole’ VLAN that is not used f or anything on the network.Disable autonegotiation and set ports to either static access or static trunk.Change the native VLAN to a fixed VLAN that is distinct from all user VLANs and to a VLAN number that is not VLAN 1.All user ports are associated with VLANs distinct from VLAN 1 and distinct from the ‘black-hole’ VLAN.*4Which command is used to remove only VLAN 20 from a switch?no switchport access vlan 20delete flash:vlan.datno vlan 20*delete vlan.dat5A Cisco Catalyst switch has been added to support the use of multiple VLANs as part of an enterprise network. The network technician finds it necessary to clear all VLAN information from the switch in order to incorporate a new network design. What should the technician do to accomplish this task?Erase the startup configuration and reboot the switch.Erase the running configuration and reboot the switch.Delete the startup configuration and the vlan.dat file in the flash memory of the switch and reboot the switch.*Delete the IP address that is assigned to the management VLAN and reboot the switch.6What is the effect of issuing a switchport access vlan 20 command on the Fa0/18 port of a switch that does not have this VLAN in the VLAN database?VLAN 20 will be created automatically.*The command will have no effect on the switch.Port Fa0/18 will be shut down.An error stating that VLAN 20 does not exist will be displayed and VLAN 20 is not created.Which command displays the encapsulation type, the voice VLAN ID, and the access mode VLAN for the Fa0/1 interface?show mac address-table interface Fa0/1show interfaces Fa0/1 switchport*show interfaces trunkshow vlan brief8Place the options in the following order:- not scored -dynamic autononegotiatedynamic desirabletrunk9Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?Port Fa0/11 will be returned to VLAN 1.*VLAN 30 will be deleted.An error message would be displayed.Port Fa0/11 will be shutdown.What must the network administrator do to remove Fast Ethernet port fa0/1 from VLAN 2 and assign it to VLAN 3?Enter the no vlan 2 and the vlan 3 commands in global configuration mode. Enter the switchport trunk native vlan 3 command in interface configuration mode.Enter the switchport access vlan 3 command in interface configuration mode.*Enter the no shutdown in interface configuration mode to return it to the default configuration and then configure the port for VLAN 3.11Which two Layer 2 security best practices would help prevent VLAN hopping attacks? (Choose two.)Disable DTP autonegotiation on end-user ports.*Change the management VLAN to a distinct VLAN that is not accessible by regular users.Statically configure all ports that connect to end-user host devices to be in trunk mode.Change the native VLAN number to one that is distinct from all user VLANs and is not VLAN 1.*Use SSH for all remote management access.12In a basic VLAN hopping attack, which switch feature do attackers take advantage of?automatic encapsulation negotiationthe default automatic trunking configuration*an open Telnet connectionforwarding of broadcasts13A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?It allows only VLAN 30 on Fa0/5.*It allows a native VLAN of 30 to be implemented on Fa0/5.It allows VLANs 1 to 30 on Fa0/5.It allows VLANs 10, 20, and 30 on Fa0/5.14Refer to the exhibit. A frame is traveling between PC-A and PC-B through the switch. Which statement is true concerning VLAN tagging of the frame?No VLAN tag is added to the frame.*A VLAN tag is added when the frame is accepted by the switch.A VLAN tag is added when the frame is forwarded out the port to PC-B.A VLAN tag is added when the frame leaves PC-A.15Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?The native VLAN is being pruned from the link.The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.*The trunk has been configured with the switchport nonegotiate command. The native VLAN should be VLAN 60.16What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?All VLANs will be allowed across the trunk.*Only the native VLAN will be allowed across the trunk.The switches will negotiate via VTP which VLANs to allow across the trunk. Only VLAN 1 will be allowed across the trunk.17Under which two occasions should an administrator disable DTP while managing a local area network? (Choose two.)on links that should not be trunking*when connecting a Cisco switch to a non-Cisco switch*on links that should dynamically attempt trunkingwhen a neighbor switch uses a DTP mode of dynamic autowhen a neighbor switch uses a DTP mode of dynamic desirable18Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.Which PCs will receive the broadcast sent by PC-C?PC-D, PC-E*PC-A, PC-B, PC-D, PC-EPC-A, PC-BPC-A, PC-B, PC-D, PC-E, PC-FPC-A, PC-B, PC-E19Which two statements are true about VLAN implementation? (Choose two.)The network load increases significantly because of added trunking information.Devices in one VLAN do not hear the broadcasts from devices in another VLAN.*The size of the collision domain is reduced.VLANs logically group hosts, regardless of physical location.*The number of required switches in a network decreases.20Refer to the exhibit. DLS1 is connected to another switch, DLS2, via a trunk link. A host that is connected to DLS1 is not able to communicate to a host that is connected to DLS2, even though they are both in VLAN 99. Which command should be added to Fa0/1 on DLS1 to correct the problem?switchport trunk allowed vlan add 99switchport trunk native vlan 66*switchport mode dynamic autoswitchport nonegotiate21Which switch feature ensures that no unicast, multicast, or broadcast traffic is passed between ports that are configured with this feature?switch port securityPVLAN protected port*ACLVLAN22Fill in the blank. Use the full command syntax.The ” show vlan brief” command displays the VLAN assignment for all ports as well as the existing VLANs on the switch.23Which three statements accurately describe VLAN types? (Choose three).An 802.1Q trunk port, with a native VLAN assigned, supports both tagged and untagged traffic.*A management VLAN is any VLAN that is configured to access management features of the switch.*A data VLAN is used to carry VLAN management data and user-generated traffic.Voice VLANs are used to support user phone and e-mail traffic on a network. VLAN 1 is always used as the management VLAN.After the initial boot of an unconfigured switch, all ports are members of the default VLAN.*24Which command should the network administrator implement to prevent the transfer of DTP frames between a Cisco switch and a non-Cisco switch?S1(config-if)# switchport mode trunkS1(config-if)# switchport mode accessS1(config-if)# switchport nonegotiate*S1(config-if)# switchport mode dynamic desirableS1(config-if)# switchport trunk allowed vlan noneCCNA 2 - Chapter 41What type of IPv6 address is required as a minimum on IPv6 enabled interfaces?staticglobal unicastlink-local*loopbackunique local2In order for packets to be sent to a remote destination, what three pieces of information must be configured on a host? (Choose three.)default gateway*hostnameDNS server addressDHCP server addressIP address*subnet mask*3What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.)MAC addressesLayer 1 statuses*IP addresses*next-hop addressesinterface descriptionsspeed and duplex settings4Place the options in the following order:next hopdestination networkmetric- not scored -administrative distanceroute timestamproute source protocol- not scored -5Which two items are used by a host device when performing an ANDing operation to determine if a destination address is on the same local network? (Choose two.)destination MAC addressnetwork numberdestination IP address*source MAC addresssubnet mask*6Refer to the exhibit. A network administrator issues the show ipv6 route command on R1. What two conclusions can be drawn from the routing table? (Choose two.)Packets that are destined for the network 2001:DB8:ACAD:2::/64 will be forwarded through Fa0/1.R1 does not know a route to any remote networks.*The interface Fa0/1 is configured with IPv6 address2001:DB8:ACAD:A::12.*Packets that are destined for the network 2001:DB8:ACAD:2::54/128 will be forwarded through Fa0/0.The network FF00::/8 is installed through a static route command.7Refer to the exhibit. What is the purpose of the highlighted field in the line that is displayed from the show ip route command?It indicates that this is a directly connected route.It indicates that this route has been deleted from the routing table. It indicates that this route was learned via EIGRP.*It indicates that this is a default route.8Which two statements correctly describe the concepts of administrative distance and metric? (Choose two.)The metric varies depending which Layer 3 protocol is being routed, such as IP.A router first installs routes with higher administrative distances. The value of the administrative distance can not be altered by the network administrator.Routes with the smallest metric to a destination indicate the best path.* Administrative distance refers to the trustworthiness of a particular route.*The metric is always determined based on hop count.9What are two functions of a router? (Choose two.)It manages the VLAN database.It increases the size of the broadcast domain.It controls the flow of data via the use of Layer 2 addresses.It determines the best path to send packets.*It connects multiple IP networks.*10A packet moves from a host on one network to a device on a remote network within the same company. If NAT is not performed on the packet, which two items remain unchanged during the transfer of the packet from source to destination? (Choose two.)destination MAC addresssource ARP tablesource IP address*destination IP address*source MAC addressLayer 2 header11。

CCNA第三学期第二章答案

1下列有关在交换机上发出的 banner login "Authorized personnel Only" 命令的说法中哪项正确？Option 2该命令应在特权执行模式下输入。

该命令会导致用户登录前显示 Authorized personnel Only 消息。

该命令会生成并显示错误消息 % Ambiguous command: "banner motd" ”。

将该命令输入交换机后，屏幕上会显示 End with the character “%”消息。

2哪种命令行界面 (CLI) 模式允许用户配置诸如主机名和口令等交换机参数？Option 3用户执行模式特权执行模式全局配置模式接口配置模式3网络管理员通过 CLI 输入一个命令，该命令需要几个参数。

交换机的响应为 "% Incomplete command"。

管理员不记得缺失了什么参数。

管理员可通过什么方法在线代理|网页代理|代理网页|来获取参数信息？Option 2向最后一个参数末尾附加一个问号 (?)向最后一个参数末尾附加一个空格，然后附加一个问号 (?)按 Ctrl-P 显示参数列表按 Tab 键显示可用的选项4请参见图示。

图中显示了 show running-config 命令的部分输出。

此交换机的使能口令是 "cisco"。

从图中所示的输出可得出什么结论？Option 3默认情况下会加密使能口令。

所有加密口令均采用 MD5 哈希算法加密。

在此配置中，已配置的所有线路模式口令都会被加密。

此行代表最安全的特权执行模式口令。

在线代理|网页代理|代理网页|5采用 CSMA/CD 的网络中发生冲突时，需要传输数据的主机在回退时间到期后做何反应？Option 1主机恢复传输前侦听模式。

造成冲突的主机优先发送数据。

造成冲突的主机重新传输最后 16 个帧。

主机延长其延迟时间以便快速传输。

CCNA02-final2

1 Which of the following are primary functions of a router? (Choose two.)packet switchingmicrosegmentationdomain name resolutionpath selectionflow control2Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.)The router modifies the TTL field, decrementing it by one.The router changes the source IP to the IP of the exit interface.The router maintains the same source and destination IP.The router changes the source physical address to the physical address of the exit interface.The router changes the destination IP to the IP of the exit interface.The router sends the packet out all other interfaces, besides the one it entered the router on.3Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.4Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is true regarding how the routers in this topology event?Router4 will learn about the failed route 30 seconds later in the next periodic update.Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expires.Router5 immediately flushes the unreachable route from its routing table.Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.5Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.6If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from where will the router try to load the IOS imageROMRAMNVRAMflashTFTP server7Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address8Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured?the IP address of the Fa0/0 interface at R1the IP address of the S0/0/1 interface at R2the IP address of the S0/0/0 interface at R1the subnet mask of the S0/0/1 interface at R29Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?192.168.1.0/24192.168.0.0/24192.168.0.0/22192.168.1.0/2210Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.11Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge12Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load the start-up configuration settings.What could be the cause of this problem?There is insufficient NVRAM.There is insufficient flash memory.The configuration register is not configured with the default setting.The system image file is not located in NVRAM.13Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip database command. However, upon running the sh command, the network administrator sees that the router has installed a different route to the 192.168.6.0 network learned via EIGRP. What could be the reason for th route?Compared to RIP, EIGRP has a lower administrative distance.Compared to EIGRP, RIP has a higher metric value for the route.Compared to RIP, the EIGRP route has fewer hops.Compared to RIP, EIGRP has a faster update timer.14Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to confi OSPF for the networks that are connected to R2?R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 115Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.The adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.16Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routers are unable to establish a neighbor adjacency. W network administrator do to troubleshoot this problem?Check if the interfaces of the routers are enabled.Check the hello and dead intervals between the routers.Check the process ID of both routers.Check if CDP is enabled on all the routers.17Refer to the exhibit. A network administrator has configured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/118Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.19Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this commandThis route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.20Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.21Which statement is true about the RIPv1 protocol?It is a link-state routing protocol.It excludes subnet information from the routing updates.It uses the DUAL algorithm to insert backup routes into the topology table.It uses classless routing as the default method on the router.22Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)authenticationlink-state advertisementshold-down timersSpanning Tree Protocolsplit horizon23Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?An incorrect IP address is configured between the two routers.No static route is configured on Router2.A routing loop has occurred.No routing protocol is configured on either of the two routers.24Which mechanism helps to avoid routing loops by advertising a metric of infinity?route poisoningsplit horizonhold-down timertriggered updates25Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.26Which two statements are true about the EIGRP successor route? (Choose two.)It is saved in the topology table for use if the primary route fails.It may be backed up by a feasible successor route.It is used by EIGRP to forward traffic to the destination.It is flagged as active in the routing table.After the discovery process has occurred, the successor route is stored in the neighbor table.27In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing table28Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which ac correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.29Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Router2 in order to put the interface in the same networ interface of Router1?IP 172.16.0.18, subnet mask 255.255.255.0IP 172.16.32.15, subnet mask 255.255.255.240IP 172.16.0.18, subnet mask 255.255.255.252IP 172.16.32.18, subnet mask 255.255.255.25230 A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured on all routers. Both protocols appear in the oprotocols. However, only EIGRP internal routes appear in the routing tables. Which statement correctly explains the scenario?The OSPF protocol has a higher cost than EIGRP.The EIGRP protocol has a lower metric than OSPF.The EIGRP protocol was configured first on the router.The EIGRP protocol has a lower administrative distance than OSPF.31Which prompt is used to allow a user to change the IP address of an interface on a router?Router>Router#Router(config)#Router(config-if)#32Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configu connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.Routes are being summarized by R1 but not by R2.33 A network administrator is in charge of two separate networks that share a single building. What device will be required to connect the two networks and add a comthe Internet that can be shared?hubrouteraccess pointEthernet switch34 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hosts for local LANs. Which subnet mask sadministrator use to create the new subnets?255.255.224.0255.255.240.0255.255.248.0255.255.252.035Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static route entry be altered to accommodate aKeep the existing static route and configure a new static route with the correct next hop IP address.Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address.Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP address.36Refer to the exhibit. What needs to be done to allow these two routers to connect successfully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.Change the serial interface on R2 to S0/0/0 so that it matches R1.Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1.37Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router without entering a password?The login command was not entered on the console line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be configured to require users to provide passwords.38Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration as router RTR_A. What should be done so that ho server A?Add the command no auto-summary on all routers.Change the network statements to include a wildcard mask.Adjust the EIGRP hello timers to account for the network delay.Add the command eigrp log-neighbor-changes on all routers.39Refer to the exhibit. The network administrator has run the following command on R1.R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command?Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.This route is automatically propagated throughout the entire network.Traffic for all networks is forwarded to 172.16.1.2.The command invokes a dynamic routing protocol for 192.168.2.0.40What are two ways that a router can learn of the paths to destination networks? (Choose two.)updates from other routersDHCP information broadcastsmanual configuration of routesARP requests from connected routersinspection of the destination IP address in data packetsupdates from the SMTP management information base41Why is fast convergence desirable in networks that use dynamic routing protocols?Hosts are unable to access their gateway until the network is converged.Routers will not allow packets to be forwarded until the network is converged.Routers may make incorrect forwarding decisions until the network has converged.Routers will not allow configuration changes to be made until the network has converged.42A router learns about network 192.168.10.128/27 from multiple sources. Which option represents the best route and will be placed in the routing table?S 192.168.10.128/27 [1/0] via 192.168.10.226R 192.168.10.128/27 [120/2] via 192.168.10.226, 00:00:14, Serial0/0/0O 192.168.10.128/27 [110/1563] via 192.168.10.226, 00:00:09, Serial0/0/0D 192.168.10.128/27 [90/21026560] via 192.168.10.226, 00:00:16, Serial0/0/043Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?10.30.0.0/1610.30.15.0/2310.30.16.0/2410.30.16.32/2710.30.16.32/3044Which feature of RIPv2 enables it to function as a classless routing protocol?Subnet masks are included in routing updates.Routing updates are triggered by topology changes.Next-hop addresses are included in routing updates.Multicast addresses are used to send routing updates.45Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displayed. All routers are operational and pings are network.Which ping will fail?from R1 to 172.16.1.1from R1 to 192.168.3.1from R2 to 192.168.1.1from R2 to 192.168.3.146 A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional command must be issued by the technicianinterface to forward traffic?Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config47Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?48Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set of addressing values would allow a compute to the router interface to communicate with remote networks?A: 172.16.3.254 B: 255.255.192.0 C: 172.16.3.31A: 172.16.3.31 B: 255.255.192.0 C: 172.16.3.255A: 172.16.3.254 B: 255.255.255.0 C: 172.16.3.31A: 172.16.3.31 B: 255.255.255.0 C: 172.16.3.149Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/2450Refer to the exhibit. When all of the commands that are shown in the exhibit are entered at the correct router prompt, what is the name of the router?nameciscorouterhostname。

final exam 2 CCNA 第三学期(免费下载)

请参见图示。

将图中列出的命令输入路由器R1 和交换机S1 后，PC1 和PC2 彼此无法ping 通。

网络管理员输入show interfaces trunk命令后获得了图中所示的结果。

问题很可能出在哪里？路由器上未配置路由协议。

已建立中继链路，但未将任何VLAN 配置为使用该中继链路。

由于交换机端口未配置为中继，因此未建立中继链路。

必须在交换机或路由器上或同时在这两台设备上配置dynamic desirable选项，动态中继协议才能建立中继链路。

2请参见图示。

哪一个口令可让管理员进入特权执行模式？Bcisco1cisco2cisco3Cisco3下列关于service password-encryption命令的说法中哪项正确？cservice password-encryption命令应在特权执行模式提示符下输入。

service password-encryption命令只加密控制台与VTY 端口的口令。

service password-encryption命令对运行配置中先前未加密的所有口令进行加密。

若要查看通过service password-encryption命令加密的口令，可输入no service password-encryption命令。

4请参见图示。

RTB 被配置为进行传统的VLAN 间路由。

RTB 可以ping 通计算机 A 但无法ping 通计算机B。

此故障的原因可能是什么？Fa0/11 端口处于错误的VLAN 中。

RTB 上没有有效的路由协议。

计算机 B 的IP 地址在错误的逻辑网络中。

路由器的Fa0/1 接口上配置了错误的中继封装类型。

5请参见图示。

最近安装了SW1 用于取代集线器。

主机1 和主机 4 同时传送数据。

网络设备会如何处理此事件？（选择两当冲突发生时，会调用回退算法。

A D由于主机 1 和主机4 都连接到交换机，因此不会发生冲突。

交换机将根据交换机MAC 地址表中的信息将数据转发到相应的端口。

CCNA2PracticeFinalExamAnswerV3.1

CCNA2PracticeFinalExamAnswerV3.11. Which statements are true regarding VTY passwords? (Choose two.)VTY passwords must be encrypted.All VTY lines do not need to use the same password.A VTY password is required to establish telnet sessions.The VTY password is set with the command line console 0.The VTY password must be identical with the enable secret password. 2.Refer to the network and routing table entries shown in the graphic. What will happen when a packet destined for network 192.66.7.0 is received by Router A?It will be forwarded through interface S1.It will be forwarded to the default route.It will be directed toward the Internet.It will be discarded.3.Which command will produce the output shown in the graphic?show cdpshow cdp neighborsshow cdp neighbors detailshow cdp detail4.Router B received an interface configuration change. Suddenly, it transmits a new update. Which of the following could have triggered this update? (Choose two.)Router B received a configuration change.Router A sent a message requesting an update.Router C came online after Router B sent the RIP update.Router B received an error message indicating the last update was not received.5. How many Telnet sessions can take place simultaneously on a router running a standard edition of the IOS?458106. Which of the following WAN connection services typically use synchronous communications? (Choose two.)circuit-switchedleased linepacket-switchedEthernetanalog modem services7. Which of the following will add a TFTP server as a fallback source fora router to load an IOS image?Router# boot system tftp 163.150.9.31 c2500-d-l.120-9Router# copy run startRouter# boot system tftp c2500-d-l.120-9.bin 163.150.9.31Router# copy run startRouter# config tRouter(config)# boot system tftp c2500-d-l.120-9.bin 163.150.9.31 Router(config)# exitRouter# copy run startRouter# config tRouter(config)# boot system tftp 163.150.9.31 c2500-d-l.120-9.binRouter(config)# exitRouter# copy run start8. What types of messages are sent periodically by devices configured for CDP?probesbeaconssignalsadvertisementsrouting updatesunicast9. An administrator has made routing protocol changes to a ro uter’s configuration. To ensure that the changes are implemented, the active configuration is saved and the router is reloaded. After the router has initialized, the output on the screen displays "Would you like to enter the initial configuration dialog?[yes/no]:" Why did this dialog appear?There was a POST failure.The incorrect IOS loaded.There was an error in the startup configuration file.The configuration register was set to ignore NVRAM.10. Which command is used to redirect debug information to a device that is connected though a Telnet session? Router# monitorRouter# terminal redirect vty 0Router# terminal monitorRouter# monitor output vty 011. After issuing the show interfaces command, a technician notices the line "Serial1 is down, line protocol is down" in the output. Which of the following are possible reasons for this message output? (Choose three.)There is a mismatch in the encapsulation type on both ends of the link.A Layer 1 issue exists.An interface problem exists.The clockrate was not set during configuration.There is no usable media for the protocol.Keepalive messages are not being sent.12.Refer to the above graphic. When using RIP as the routing protocol, how would Chicago use load balancing to route packets to New York? (Choose two.)by forwarding packets over paths of equal costby forwarding packets according to hop count and speed of the linkby determining which interface has the least traffic and sending to it firstby first determining the speed of the links and then cycling packets through the fastest links firstby cycling packets through interfaces and routes following the same pattern (Router 1, 2, 3) each time13. When would the ROM monitor mode be used? (Choose two.) maintaining routing configuration settingsmodifying the IOS image stored in Flashrunning a limited IOS feature setperforming the bootstrap process14. Which two statements are true about route metrics? (Choose two.)The more factors that make up a metric, the greater the flexibility to tailor network operations.The larger the metric number, the better the path.Routing protocols use metrics to send routing updates to directly connected neighbors.Bandwidth and delay are static metrics used by RIP v1.Ticks, delay, and cost are metrics used by routing protocols.15.Which of the following are valid static IP routes? (Choose three.) RouterB(config)# ip route 192.168.5.0 255.255.255.0 S1 RouterC(config)# ip route 192.168.1.0 255.255.255.0 S1RouterA(config)# ip route 192.168.3.0 255.255.255.0 192.168.2.2 RouterB(config)# ip route 192.168.1.0 255.255.255.0 192.168.2.2 RouterC(config)# ip route 192.168.2.0 255.255.255.0 192.168.4.1 RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.2.116. Of the eight network users on the Human Resources department LAN, one cannot connect to the file serv er. The user’s PC has successfully booted but can not see the network. What should be checked first?the PC power cordthe file serverthe PC network interface card LEDsthe LAN switch in the wiring closetthe configuration of the router interface attached to the LAN17. What can be determined from the partial output of the show ip route command displayed below? (Choose two.)R 200.200.200.0/24 [120/1] via 192.168.10.2, 00:00:14, Serial0/0C 192.168.10.0/24 is directly connected, Serial0/0The next update will be in 76 seconds.The next update will be in 16 seconds.The administrative distance is 120 and the metric is 1.The metric is 120 and the administrative distance is 1.200.200.200.0 is configured on Serial0/0.192.168.10.2 is configured on Serial0/0.18. Why is it useful to have an interface description?A user can telnet to the router using the interface description.The interface description is a shortcut way to edit the running-config. The interface description helps identify distant network connections.The interface will remain inactive until an interface description is applied.19.Assume OSPF is being used on all routers. What happens when the link between Router1 and Router2 goes down? (Choose two.)Updates start broadcasting every 30 seconds.Updates start broadcasting every 90 seconds.Link-state advertisements are flooded.Link-state advertisements are sent only to neighboring routers.All routers note the change and adjust routes.All routers ignore the change until the route becomes active again. 20.The internetwork needs to communicate between the hosts connected to the E0 interface of the Utah router and hosts connected to the E0 interface of the Idaho router. The hosts should also have connectivity to the Internet. Which commands must be configured in order to enable this communication? (Choose three.)Idaho(config)# ip route 172.31.1.0 255.255.255.0 172.31.2.1Idaho(config)# ip route 0.0.0.0 0.0.0.0 s0Idaho(config)# ip route 172.31.2.0 255.255.255.0 172.31.2.2Utah(config)# ip route 172.31.3.0 255.255.255.0 172.31.2.1Utah(config)# ip route 172.31.3.0 255.255.255.0 s1Utah(config)# ip route 0.0.0.0 0.0.0.0 s021. Which statement about datagram life is true?Each router increments the TTL value of the datagram until the maximum hop count of the routing protocol is reached. The packet is then returned to the source.The packet is dropped when the router count and the TTL value match. The source is notified that transmission has failed. Each router decreases the TTL value by one until it reaches zero. The datagram is then discarded and a time exceeded for message is sent to the source.The destination device discards the datagram if the TTL value is zero on arrival. An ICMP destination unreachable message is sent back to the source.22.The following access list has been created to prevent traffic from host 204.204.7.122 from accessing the 201.100.11.0 network.access-list 22 deny host 204.204.7.122access-list 22 permit anyWhich group of commands will properly place this access list so that this host is denied access only to the 201.100.11.0 network?RouterA(config)# interface s0/0RouterA(config-if)# ip access-group 22 inRouterA(config)# interface s0/0RouterA(config-if)# ip access-group 22 outRouterA(config)# interface fa0/0RouterA(config-if)# ip access-group 22 inRouterB(config)# interface fa0/0RouterB(config-if)# ip access-group 22 inRouterB(config)# interface s0/0RouterB(config-if)# ip access-group 22 inRouterB(config)# interface fa0/0RouterB(config-if)# ip access-group 22 out23. A network administrator can establish a remote session to a host using the Router> telnet 192.168.1.1command but is unsuccessful when using the Router> telnet Boston command to connect to the same interface. Which of the following could be the problem? (Choose two.)The ip host table on the router is not configured.The command telnet Boston was issued from the wrong router prompt.The routing table is missing.Domain name services are not available.24. Which of the following are functions of a router? (Choose three.)packet switchingextension of network segmentssegmentation of local area networksselection of best path based on a logical addressingselection of best path based on a physical addressingThe commands shown in the graphic were entered to alter the startup sequence of the router. On the next reload, which IOS will be loaded?The router will load c2500-js-l.112-26d.The router will load c2500-d-l.120-9.The router will load the IOS from ROM.The router will boot into ROM monitor mode.26.A network administrator trying to deny Telnet traffic from the 192.5.5.0 network to the 201.100.11.0 network entered the commands shown in the graphic. When monitoring the network, the administrator noticed that Telnet packets were still passing between those networks. What is the cause?The router ignored this type of traffic because it required a standard access list to be configured instead of an extended one. The wrong port was configured for the ACL so Telnet traffic was still allowed.The access list has not been assigned to an interface.The permit ip any any allowed all traffic to pass regardless of the other statements listed in this ACL.Refer to the network graphic. A packet needs to travel from Router F to Router A. Which path would be selected by the RIP routing protocol if the default metrics are used?F, G, E, D, B, AF, E, D, C, AF, E, D, AF, E, D, B, A28. Which of the following is the correct flow of routines for a router startup?load bootstrap, load IOS, apply configurationload bootstrap, apply configuration, load IOSload IOS, load bootstrap, apply configuration, check hardwarecheck hardware, apply configuration, load bootstrap, load IOS29. In the configuration register value 0×2104, which value represents the boot field setting?x2430. ACL statements operate in sequential, logical order. If a condition match is true, the rest of the ACL statements are not checked. If all of the ACL statements are unmatched, what happens to the packet?The packets will be placed in a buffer and forwarded when the ACL is removed.The packets will be sent to the source with an error notification message.The implicit permit any statement placed at the end of the list will allow the packets to flow through uninhibited.The implicit deny any statement placed at the end of the list will cause the packets to be dropped.31. Which of the following would cause the "Message Of The Day" banner to appear? (Choose three.)telnetting into the routerinitiating a debug sessionconfiguring a router for the first timeusing the Aux port to check the current configurationusing the console port to check the current configuration32.The administrator knows that port E0 on router B connects to a small LAN without any routers. Which command can be executed on router B to conserve bandwidth on port E0?no update timersholdown-timer 96poison reverse E0passive-interface E0no triggered updates33. When must a router serial interface be configured with the clock rate command?when the interface is functioning as a DTE devicewhen the interface timers have been clearedwhen the connected DTE device is shut downwhen the interface is functioning as a DCE device34. What are the major characteristics of a wide area network? (Choose three.)connect devices separated by wide geographical areasincludes technologies of FDDI and Ethernetuses serial connections to access bandwidthcommon carriers are needed for connectionstype of connection between a router and a switch35. If the config-register on a router is set to 0×2102, where is the first place the router will look for boot system commands? RAMROMFlashNVRAM36. Why would an administrator use the Telnet application when troubleshooting a network? (Choose three.)It can be used to verify the operation of application layer software between the source and destination.Telnet can use the ICMP protocol to verify a hardware connection and network layer address.It is the most complete testing mechanism available.Remote networks may be accessed via a Telnet session for troubleshooting.Time to Live values are used by Telnet to identify a failure of device between source and destination.37.The network shown in the graphic is using RIP as the routing protocol. Which of the following are true regarding the network discovery process that will occur for this network? (Choose three.)The Palm Beach router will show networks 192.168.7.0 and 192.168.8.0 as directly connected networks.All of the routers will have direct knowledge of the exact topology of the entire network.The Key West router will forward routing table information to the Miami and Palm Beach routers.The Miami router will learn about network 192.168.1.0 from the Key West router.If network 192.168.4.0 becomes unavailable, the Key West router will notify the other routers of this fact in the next update.38. Which of the following are characteristics of the Open Shortest Path First (OSPF) routing protocol? (Choose two.) functions as a link-state routing protocoldiscards packets when the hop count is greater than 15calculates the shortest path to a destination using the Diffused Update Algorithm (DUAL)created as a proprietary routing protocolfloods updates as topology changes occurbroadcasts routing updates every 90 seconds or as triggered by topology changes39. The following line was displayed in the output of the show ip route command.R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0What is the value of the routing metric?312203012040.Refer to the output from the show ip route command. What can be concluded from the output of this router command?A preferred route to the destination has not been set.There are two equal cost paths to network 1.0.0.0.Both interfaces are being used equally to route traffic.A variance must be set to load-balance across multiple paths.41. Which of the following are true statements about creating and applying access lists? (Choose three.)Access list entries should filter in the order from general to specific.One access list per port per protocol per direction is permitted.Standard ACLs should be applied closest to the source while extended ACLs should be applied closest to the destination. There is an implicit deny at the end of all access lists.Statements are processed sequentially from top to bottom until a match is found.The inbound keyword refers to traffic entering the network from the router interface where the ACL is applied.42. Which of the following are true regarding the setup configuration mode? (Choose three.)To abort the setup mode, use the CTRL+SHIFT+6 keys.To abort the setup mode, use the CTRL+C keys.Setup mode allows a complete configuration of the router.To enter setup mode, use the privileged mode setup command.A router that does not find a valid IOS during the boot process will start the system configuration dialog.A router that does not find a valid configuration file during the boot process will start the system configuration dialog.43. Which of the following are necessary for basic network communication to occur between hosts that will run such applications as Telnet, web browsers, and e-mail? (Choose three.)TCP/IP must be installed and properly configured on each device.。

ccna第四学期final试题(二)

CCNA第四学期《Final Examination》1 一名技术人员正在与竞争对手公司的一名同行聊天，比较两家公司的DSL 传输速率。

两家公司都处于同一个城市，使用同一家服务提供商的服务，且拥有相同的速率/服务计划。

为什么 A 公司报告的下载速度比 B 公司高？公司B 的POTS 语音流量比A 公司的高。

与A 公司相比，B 公司与更多客户共享通向DSLAM 的连接。

A公司在分支点仅使用微型过滤器。

A公司离服务提供商较近。

2请参见图示。

远程用户与服务器之间的SSH 连接发生了故障。

检验表明NAT 配置正确。

此问题最可能的原因是什么？S SH 无法通过NAT。

存在不正确的访问控制列表条目。

访问列表中的SSH 端口号不正确。

必须在S0/0/0 接口上使用ip helper 命令来允许入站连接。

3 CHAP 协议有哪三项特征？（选择三项。

）会在会话过程中交换一个随机的询问号以检验身份会发送身份验证密码以检验身份会防止以明文传输登录信息如果身份验证失败，则会断开PPP 会话连接会发起双向握手容易遭受回送攻击4 命令show frame-relay map 的输出如下：Serial 0 (up): ip 192.168.151.4 dlci 122, dynamic, broadcast, status defined, active下列哪三种说法正确描述了所示内容的意义？（选择三项。

）192.168.151.4 代表远程路由器的IP 地址192.168.151.4 代表本地串行接口的IP 地址D LCI 122 代表远程串行接口D LCI 122 代表用于连接远程地址的本地编号b roadcast 表示动态路由协议（例如RIP v1）可通过此PVC 发送数据包a ctive 表明ARP 进程正在工作5 路由器的SDM 主页会显示哪三点信息？（选择三项。

）A RP 缓存闪存的总容量和可用容量路由表已配置的LAN 接口的数量是否配置了DHCP 服务器该LAN 中路由器的数量6 从什么物理位置起，WAN 连接从由用户负责变为由服务提供商负责？非军事区(DMZ)分界点本地环路网云7请参见图示。

CCNA第二学期考试答案

以下是针对您未获得满分的试题给出的反馈。

某些交互式试题可能不显示您的答案。

分项分数：1与固定配置的交换机相比，模块化交换机具有哪两个优点？（请选择两项。

）正确响应您的响应每台交换机的成本更低可扩展性更高转发率更低需要的电源插座数目更少带宽聚合可以使用多个端口固定配置交换机价格较低，但是它具有指定数量的端口且不能添加端口。

它们提供的高速端口通常比较少。

为了在包含固定配置交换机的网络上扩展交换，需要购买更多的交换机。

这增加了需要使用的电源插座数量。

模块化交换机只需要购买额外的线卡便可以扩展。

带宽聚合也更容易，因为机箱的背板可以为交换机端口线卡提供所需的带宽。

此试题参考以下领域的内容：Routing and Switching Essentials• 1.1.2 交换网络2思科无边界架构接入层的基本功能是什么？正确响应您的响应聚合第 2 层广播域聚合第 3 层路由边界为用户提供访问权提供高可用性思科无边界架构接入层的功能是为用户提供网络访问。

第 2 层广播域聚合、第 3 层路由边界聚合和高可用性是分布层的功能。

也有说答案是聚合第 3 层路由边界此试题参考以下领域的内容：Routing and Switching Essentials• 1.1.1 融合网络3思科无边界架构分布层的基本功能是什么？正确响应您的响应充当主干聚合所有园区块聚合第 3 层路由边界为用户提供访问权思科无边界架构的分布层的一项基本功能是在不同的VLAN 之间路由。

充当主干和聚合园区块是核心层的功能。

为用户提供访问是接入层的功能。

此试题参考以下领域的内容：Routing and Switching Essentials• 1.1.1 融合网络4若将大端口密度、容错和低价作为重要指标，应使用哪个交换机外形因素？正确响应您的响应固定配置交换机模块化交换机可配备机架的1U 交换机可堆叠式交换机堆叠式交换机可以使用特殊电缆实现互联，从而在交换机之间提供高带宽的吞吐量，并像单个大型交换机一样运行。

CCNA第二学期final

参加考试- DsmbISP Final Exam - CCNA Discovery: Working at a Small-to-Medium Business or ISP (版本4.1)剩余时间: 02:59:59正在显示第1 页，共4 页下一页>页: 1跳转<上一页1在图中所示的其中一台路由器上执行show ip route命令，显示下列输出：C 192.168.4.0/24 is directly connected, Serial0/0R 192.168.5.0/24 [120/1] via 192.168.4.2, 00:00:19, Serial0/0R 192.168.1.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1R 192.168.2.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1C 192.168.3.0/24 is directly connected, Serial0/1此命令是从哪一台路由器执行的？ABCD当NVRAM 中没有配置文件时，路由器将进入哪种模式？2ROMMON设置全局配置特权执行3最常用的外部路由协议是什么？BGPRIPOSPFEIGRP端口过滤和访问列表通过什么方式来增强网络安全？4防止特定类型的通信到达特定网络主机。

遭受各类拒绝服务攻击时提醒网络管理员。

防止病毒、蠕虫和特洛伊木马感染主机计算机和服务器。

可对机密数据通信进行加密和身份认证。

5显示配置文件时，哪两个命令可以确保允许访问特权执行模式的口令不以纯文本显示？（选择Router(config)# enable secret ciscoRouter(config)# enable ciscoRouter(config)# encryption-password allRouter(config)# enable login encryptedRouter(config)# enable password encryptionRouter(config)# service password-encryption192.168.17.111/28 属于哪一类地址？6主机地址网络地址广播地址组播地址7请参见图示。

CCNA2 final期末考试答案A

1.A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional comma issued by the technician to activate the interface to forward traffic?Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config2Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.3Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set o values would allow a computer that is connected to the router interface to communicate with remote networks?A: 172.16.3.254B: 255.255.192.0C: 172.16.3.31A: 172.16.3.31B: 255.255.192.0C: 172.16.3.255A: 172.16.3.254B: 255.255.255.0C: 172.16.3.31A: 172.16.3.31B: 255.255.255.0C: 172.16.3.14Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be l routing table?ssss5Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?An incorrect IP address is configured between the two routers.No static route is configured on Router2.A routing loop has occurred.No routing protocol is configured on either of the two routers.Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.7Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displaye are operational and pings are not blocked on this network.Which ping will fail?from R1 to 172.16.1.1from R1 to 192.168.3.1from R2 to 192.168.1.1from R2 to 192.168.3.18Refer to the exhibit. A network administrator has configured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/19Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured?the IP address of the Fa0/0 interface at R1the IP address of the S0/0/1 interface at R2the IP address of the S0/0/0 interface at R1the subnet mask of the S0/0/1 interface at R210Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration as rou What should be done so that host A can access server A?Add the command no auto-summary on all routers.Change the network statements to include a wildcard mask.Adjust the EIGRP hello timers to account for the network delay.Add the command eigrp log-neighbor-changes on all routers.Which feature of RIPv2 enables it to function as a classless routing protocol?Subnet masks are included in routing updates.Routing updates are triggered by topology changes.Next-hop addresses are included in routing updates.Multicast addresses are used to send routing updates.12A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hLANs. Which subnet mask should the administrator use to create the new subnets?255.255.224.0255.255.240.0255.255.248.0255.255.252.013 A network administrator is in charge of two separate networks that share a single building. What device will be required totwo networks and add a common connection to the Internet that can be shared?hubrouteraccess pointEthernet switch14Refer to the exhibit. What needs to be done to allow these two routers to connect successfully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.Change the serial interface on R2 to S0/0/0 so that it matches R1.Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1.15In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing tableRefer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load th configuration settings.What could be the cause of this problem?There is insufficient NVRAM.There is insufficient flash memory.The configuration register is not configured with the default setting.The system image file is not located in NVRAM.17Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.18Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configur operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any rout the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.19W hich two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)authenticationlink-state advertisementshold-down timersSpanning Tree Protocolsplit horizon20Which prompt is used to allow a user to change the IP address of an interface on a router?Router>Router#Router(config)#Router(config-if)#Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0 result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.22Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.The adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.23Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router entering a password?The login command was not entered on the cons ole line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be configured to require users to provide passwords.24W hich of the following are primary functions of a router? (Choose two.)packet switchingmicrosegmentationdomain name resolutionpath selectionflow control25Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static altered to accommodate a topology change?Keep the existing static route and configure a new static route with the correct next hop IP address.Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address.Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP addresRefer to the exhibit. All routers are configured with no auto-summary. All routers have a default route via their Serial0/1 Router B receives a packet with a destination of 10.16.1.98. What path will the packet take?B-EB-E-D-AB-E-D-A then loop A-D-A until the TTL expiresB will immediately drop the packet.There is insufficient information to answer the question.27Refer to the exhibit. A network administrator is investigating why data packets with destination addresses of 172.16.10.10 192.168.10.100 are being dropped instead of being forwarded via the static route as expected. After confirming that the ip command has been applied on all routers in the network, what other action should the administrator take to ensure that da these addresses are forwarded via the static route?Check that all routers are configured with the same autonomous system number.Issue the no auto-summary command within the EIGRP configuration of all routers.Issue the no passive-interface command within the EIGRP configuration of all routers.Configure the static route to point to the next hop address instead of the outbound interface.28If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from whe router try to load the IOS image first?ROMRAMNVRAMflashTFTP server29T wo routers need to be configured within a single OSPF area. Which two components need to be configured on both rout this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address30Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choos10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/24Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?10.30.0.0/1610.30.15.0/2310.30.16.0/2410.30.16.32/2710.30.16.32/3032W hich three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a r (Choose three.)The router modifies the TTL field, decrementing it by one.The router changes the source IP to the IP of the exit interface.The router maintains the same source and destination IP.T he router changes the source physical address to the physical address of the exit interface.The router changes the destination IP to the IP of the exit interface.The router sends the packet out all other interfaces, besides the one it entered the router on.33Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routers are establish a neighbor adjacency. What should the network administrator do to troubleshoot this problem?Check if the interfaces of the routers are enabled.Check the hello and dead intervals between the routers.Check the process ID of both routers.Check if CDP is enabled on all the routers.34W hich mechanism helps to avoid routing loops by advertising a metric of infinity?route poisoningsplit horizonhold-down timertriggered updates35Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which tw o devices for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge36Why is fast convergence desirable in networks that use dynamic routing protocols?Hosts are unable to access their gateway until the network is converged.Routers will not allow packets to be forwarded until the network is converged.Routers may make incorrect forwarding decisions until the network has converged.Routers will not allow configuration changes to be made until the network has converged.37Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network.commands is required to configure a single area OSPF for the networks that are connected to R2?R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 138Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.39W hat are two ways that a router can learn of the paths to destination networks? (Choose two.)updates from other routersDHCP information broadcastsmanual configuration of routesARP requests from connected routersinspection of the destination IP address in data packetsupdates from the SMTP management information base40Refer to the exhibit. The network administrator has run the following command on R1.R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command?Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.This route is automatically propagated throughout the entire network.Traffic for all networks is forwarded to 172.16.1.2.The command invokes a dynamic routing protocol for 192.168.2.0.Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.42Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is tru how the routers in this topology will respond to this event?Router4 will learn about the failed route 30 seconds later in the next periodic update.Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expires.Router5 immediately flushes the unreachable route from its routing table.Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.43Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Router2 in o interface in the same network as the serial interface of Router1?IP 172.16.0.18, subnet mask 255.255.255.0IP 172.16.32.15, subnet mask 255.255.255.240IP 172.16.0.18, subnet mask 255.255.255.252IP 172.16.32.18, subnet mask 255.255.255.25244W hich statement is true about the RIPv1 protocol?It is a link-state routing protocol.It excludes subnet information from the routing updates.It uses the DUAL algorithm to insert backup routes into the topology table.It uses classless routing as the default method on the router.45Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?192.168.1.0/24192.168.0.0/24192.168.0.0/22192.168.1.0/22Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.T he shortest path first algorithm is used.Split horizon is used to avoid routing loops.47A router learns about network 192.168.10.128/27 from multiple sources. Which option represen ts the best route and will berouting table?S 192.168.10.128/27 [1/0] via 192.168.10.226R 192.168.10.128/27 [120/2] via 192.168.10.226, 00:00:14, Serial0/0/0O 192.168.10.128/27 [110/1563] via 192.168.10.226, 00:00:09, Serial0/0/0D 192.168.10.128/27 [90/21026560] via 192.168.10.226, 00:00:16, Serial0/0/048Refer to the exhibit. When all of the commands that are shown in the exhibit are entered at the correct router prompt, wha of the router?nameciscorouterhostname49W hich statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.50Which two statements are true about the EIGRP successor route? (Choose two.)It is saved in the topology table for use if the primary route fails.It may be backed up by a feasible successor route.It is used by EIGRP to forward traffic to the destination.It is flagged as active in the routing table.After the discovery process has occurred, the successor route is stored in the neighbor table.Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip databa However, upon running the show ip route command, the network administrator sees that the router has installed a differe 192.168.6.0 network learned via EIGRP. What could be the reason for the missing RIP route?Compared to RIP, EIGRP has a lower administrative distance.Compared to EIGRP, RIP has a higher metric value for the route.Compared to RIP, the EIGRP route has fewer hops.Compared to RIP, EIGRP has a faster update timer.52A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured on Both protocols appear in the output of show ip protocols. However, only EIGRP internal routes appear in the routing tabstatement correctly explains the scenario?The OSPF protocol has a higher cost than EIGRP.The EIGRP protocol has a lower metric than OSPF.The EIGRP protocol was configured first on the router.The EIGRP protocol has a lower administrative distance than OSPF.。

CCNA 2 Final Exam Answers V3.1

1. What are two possible reasons a router would not load a valid IOS from flash? (Choose two.)The configuration register is set to 0×2142.The first boot system command executed in the startup configuration file is boot system rom.The configuration register is set to 0×2100.The boot field is set to the hexadecimal number 2.The startup configuration file is missing or corrupt.2. What are two recommended uses of login banners? (Choose two.)to display security warning messagesto welcome any user to the routerto warn people about misusing privileged EXEC modeto identify circuits and other devices connected to the routerto announce a scheduled system shutdown3.Router A and Router B have been correctly configured to use RIP as a dynamic routing protocol and all intefaces on Router A and Router B are reporting "interface is up, line protocol is up" status. RIP is then configured onRouter C using the following commands:RouterC(config)# router ripRouterC(config-router)# network 192.168.4.0RouterC(config-router)# network 172.16.0.0If no additional routing is configured on Router A, Router B, and Router C, what will be the result?Networks 192.168.12.0/24, 192.168.4.0/24, and 172.16.0.0/16 will be unreachable from Router A.Router A will have no knowledge of network 192.168.12.0/24, but will have routes to networks 192.168.4.0/24 and 172.16.0.0/16.All networks shown in the graphic will be reachable by Router A, Router B, and Router C.Networks 192.168.4.0/24 and 172.16.0.0/16 will be unreachable from Router A and Router B.4. What are the primary functions of a router? (Choose two.) determine the best path for packetsprevent collisions on the network LANregulate flow control between sender and receiverprovide domain name resolutionforward packets to the appropriate interface5. What are some reasons to change the configuration register setting? (Choose two.)to force the system to ignore the configuration file stored in NVRAM to monitor password changesto change the POST sequenceto force the router to boot the IOS from NVRAMto force the system into ROM monitor mode6. A network administrator issues the erase startup-config command on a configured router with the configuration register set to 0×2102 and observes the following output:Erasing the nvram filesystem will remove all files! Continue? [Confirm] [OK]Erase of nvram: completeIf the router unexpectedly loses power after this sequence, what will occur when power is restored?The router will enter ROM monitor mode upon completion of the power-on self test (POST).The router will load the last known valid configuration file.The router will enter Rx-boot mode.The router will prompt the user to enter setup mode or to continue without entering setup mode.7. Why are routed protocols important to networking? (Choose two.) Routed protocols detect collisions and fragments.Routers use routed protocols to calculate the best path to a destination. Routed protocols transport data across the network.The fields and formats used within a packet are defined by routed protocols.Routed protocols are used to configure the metrics used by routing protocols.8. The main router of XYZ company has enough flash and RAM to store multiple IOS images. An administrator wants to upload a second IOS image from a TFTP server to the flash of the router. Which method will accomplish this task?Paste the IOS filename to the command line of the router while in global configuration mode. Press enter. Then issue the copy tftp flash command.Use the setup utility to load the new image to flash.Copy the IOS image file from a TFTP server using the command copy filenameip address flash .Copy the IOS image file from a TFTP server using the command copy tftp flash. When prompted, provide the IP address or name of the TFTP server and the IOS image filename.9.A network administrator has a console connection to the Fremantle router. Pings to Melville are successful, but pings to Cottesloe and Nedlands fail. What could be a first step in troubleshooting the problem?Use an extended ping from Fremantle to each router in the network.Use the show interfaces command from a Telnet session on Melville to check the connection to Cottesloe.Use the traceroute command to discover exactly which link in the network is down.Use the show cdp neighbors detail command from Fremantle to gather information about all Cisco routers in the network.10.Refer to the exhibit. The new security policy for the company allows all IP traffic from the Engineering LAN to the Internet while only web traffic from the Marketing LAN is allowed to the Internet. Which ACL can be applied in the outbound direction of Serial 0/1 on the Marketing router to implement the new security policy?access-list 197 permit ip 192.0.2.0 0.0.0.255 anyaccess-list 197 permit ip 198.18.112.0 0.0.0.255 any eq wwwaccess-list 165 permit ip 192.0.2.0 0.0.0.255 anyaccess-list 165 permit tcp 198.18.112.0 0.0.0.255 any eq wwwaccess-list 165 permit ip any anyaccess-list 137 permit ip 192.0.2.0 0.0.0.255 anyaccess-list 137 permit tcp 198.18.112.0 0.0.0.255 any eq wwwaccess-list 89 permit 192.0.2.0 0.0.0.255 anyaccess-list 89 permit tcp 198.18.112.0 0.0.0.255 any eq www11.Hosts from the Limerick LAN are not allowed access to the Shannon LAN but should be able to access the Internet. Which set of commands will create a standard ACL that will apply to traffic on the Shannon router interface Fa0/0 implementing this security?access-list 42 deny 172.19.123.0 0.0.0.255 192.0.2.0 0.0.0.255 access-list 42 permit anyaccess-list 56 deny 172.19.123.0 0.0.0.255access-list 56 permit anyaccess-list 61 deny 172.19.123.0 0.0.0.0access-list 61 permit anyaccess-list 87 deny ip any 192.0.2.0 0.0.0.255access-list 87 permit ip any12. Which of the following commands will correctly configure an extended ACL? (Choose two).Router(config)# access-list 18 permit tcp host 192.168.73.3 eq 25Router(config)# access-list 102 permit tcp 10.43.0.0 0.0.255.255 any eq 80Router(config)# access-list 187 permit tcp host 192.168.42.34 172.29.0.0 0.0.255.255 eq 23Router(config)# access-list 99 permit host 10.217.32.3Router(config)# access-list 128 permit tcp host 192.168.100.31 eq 2313. What are the results of setting the boot field bits in the configuration register to "0000"? (Choose two.)The startup-config file will be ignored at bootup.The router will load the IOS from Flash.The router will enter ROM monitor mode upon reload.The router will enter boot ROM mode and have limited capabilities. The administrator can enter the b command to manually boot the IOS.14.Refer to the exhibit. Router D interface S0 on has gone down. What is the maximum time that will elapse before Router A learns that network 168.58.14.0 is down?5 seconds13 seconds17 seconds25 seconds30 seconds77 seconds15. During initial router bootup the following line appears: "NVRAM invalid, possibly due to write erase."What are two possible reasons for this result? (Choose two.)The startup-config file was not saved to RAM before reboot.The IOS has been erased.The router has not been configured.The startup-config file cannot be located.The router will not enter initial configuration dialog.16.The Suffolk router is directly connected to the networks shown in the graphic and has a default route that points to the Richmond router. All interfaces are active and properly addressed. However, when the workstation on network 172.29.5.0/24 sends a packet to destination address 172.29.198.5, it is discarded by the Suffolk router. What can be a reason for this result?The ip classless command is not enabled on the Richmond router.The route was ignored if the Richmond router did not include the 172.29.198.0/24 network in its routing updates.The Richmond router is in a different autonomous system than the Suffolk router.The ip subnet-zero command was not configured on the Suffolk router.The ip classless command is not enabled on the Suffolk router.17. access-list 199 deny tcp 178.15.0.0 0.0.255.255 any eq 23 access-list 199 permit ip any anyAssuming this ACL is correctly applied to a router interface, which statements describe traffic on the network? (Choose two.)All FTP traffic from network 178.15.0.0 will be permitted.All Telnet traffic destined for network 178.15.0.0 will be denied.Telnet and FTP will be permitted from all hosts on network 178.15.0.0 to any destination.Telnet will not be permitted from any hosts on network 178.15.0.0 to any destination.Telnet will not be permitted to any host on network 178.15.0.0 from any destination.18.What facts can be determined from the highlighted text shown in the exhibit? (Choose two.)A weak encryption was applied to all unencrypted passwords.The enable password is now more secure than the enable secret password.An MD5 hashing algorithm was used on all encrypted passwords.Any configured user EXEC mode or Telnet passwords will be encrypted in this configuration.The service password-encryption command was used to encrypt all passwords on the router including enable secret.19. What are three features of CDP? (Choose three.)provides information on directly connected devices that have CDP enabled tests Layer 2 connectivityenabled by default on each interfaceprovides a layer of securityused for debugging Layer 4 connectivity issues20. What information can be learned during the initial router bootup? (Choose two.)the configuration register valuethe number and types of interfaces installedthe router model and the amount of memory that is availablethe amount of memory required to load the IOS and configurationthe number of interfaces with connected cables21.What can be concluded from the output shown in the exhibit? (Choose three.)This is a standard IP access list.This is an extended IP access list.The keyword host is implied in the command line access-list 99 deny 10.213.177.76.The wildcard mask must be configured for this access list to function properly.Host 10.213.177.100 will be allowed access to the Serial0/1 interface.22. Which statements are true regarding setup mode? (Choose three.)Press Ctrl-z to terminate setup mode.Enter a question mark (?) for help at any point.Press Spacebar to accept the default settings.Use setup mode to enter complex protocol features.Press Enter to accept the default settings.Press Ctrl-c to abort configuration dialog.23.Refer to the graphic. Which series of commands will create static routes that will allow Router A and Router B to deliver packets destined for LAN A and LAN B, and direct all other traffic to the Internet?RouterA(config)# ip route 10.90.3.0 255.255.255.0 192.168.3.2RouterB(config)# ip route 192.168.2.0 255.255.255.0 192.168.3.1 RouterB(config)# ip route 0.0.0.0 0.0.0.0 s0/0RouterA(config)# ip route 10.90.3.0 255.255.255.0 192.168.3.2RouterA(config)# ip route 0.0.0.0 0.0.0.0 192.168.3.2RouterB(config)# ip route 192.168.2.0 255.255.255.0 192.168.3.1RouterA(config)# ip route 0.0.0.0 0.0.0.0 192.168.3.2RouterB(config)# ip route 192.168.2.0 255.255.255.0 192.168.3.1 RouterB(config)# ip route 172.20.20.4 255.255.255.252 s0/0RouterA(config)# ip route 0.0.0.0 0.0.0.0 192.168.3.2RouterB(config)# ip route 192.168.2.0 255.255.255.0 192.168.3.1 RouterB(config)# ip route 0.0.0.0 0.0.0.0 s0/024.Which devices can be used to convert the data from a WAN router at the customer site into a form acceptable for use by the WAN service provider? (Choose three.)Ethernet switchDTEmodemhubDCE deviceCSU/DSU25.What will occur when the following ACL is applied inbound to both FastEthernet interfaces of Router A in the graphic?access-list 125 permit tcp 192.168.2.0 0.0.0.255 10.90.3.0 0.0.0.255 eq 23access-list 125 permit tcp 10.90.3.0 0.0.0.255 192.168.2.0 0.0.0.255 eq 23access-list 125 permit tcp 192.168.2.0 0.0.0.255 any eq wwwWorkstations A and B will be able to Telnet to each other. WorkstationA will be allowed to access Web servers on the Internet, while WorkstationB will be denied Internet Web access.Workstations A and B will be able to Telnet to each other. All other traffic will be denied.The ACL will have no effect because it should be applied in the outbound direction on the FastEthernet interfaces.The ACL will deny all traffic because of the implied deny ip any any statement at the end of the ACL.26. Based on this partial output of the show ip route command, which routing protocol is configured on the router?R 172.16.3.0/24 [120/3] via 172.16.2.2, 00:00:27, Serial0/0RIPEIGRPOSPFIGPBGP27.Which of the following are correct statements verified by the router output shown in the graphic? (Choose two.)Layer 3 connectivity exists between BigCity and the devices in the Device ID column.Layer 2 connectivity exists between BigCity and the devices in the Device ID column.All devices shown in the Device ID column use the TCP/IP protocol suite.All devices shown in the Device ID column can be pinged from BigCity.All devices listed in the Device ID column are directly connected to BigCity.28. A network administrator must configure a FastEthernet interface with an IP address. The configuration must also identify the remote site to which the interface is connected. Which set of commands will meet these requirements?StPetersburg(config)# banner San Jose T1StPetersburg(config)# interface fa0/0StPetersburg(config-if)# ip address 172.26.155.5 255.255.255.252StPetersburg(config)# interface fa0/0StPetersburg(config-if)# ip address 172.26.155.5 netmask255.255.255.252StPetersburg(config-if)# description San Jose T1StPetersburg(config)# interface fa0/0StPetersburg(config-if)# ip address 172.26.155.5 255.255.255.252 StPetersburg(config-if)# banner remote site San Jose T1StPetersburg(config)# interface fa0/0StPetersburg(config-if)# ip address 172.26.155.5 255.255.255.252 StPetersburg(config-if)# description San Jose T129. What are the features of a serial interface on a router? (Choose two.) enabled by defaultassigned a unique MAC addressmust be configured as a DCE in lab and production environmentsmust be configured with the default clock rate of 56000may be administratively enabled by using the no shutdown commandmust be configured with a valid IP address and subnet mask in order to forward packets30. Assuming the following ACL is correctly applied to a router interface, what can be concluded about this set of commands? (Choose two.) Router(config)# access-list 165 deny tcp 192.28.115.0 0.0.0.255 172.20.0.0 0.0.255.255 eq 23Router(config)# access-list 165 permit ip any anyThis is a standard IP access list that denies network 192.28.115.0 Telnet access to the 172.20.0.0 network.All Telnet traffic destined for 172.20.0.0 from any network will be denied access.Network 192.28.115.0 is denied Telnet access to the 172.20.0.0 network. Network 172.20.0.0 is denied Telnet access to the 192.28.115.0 network.All FTP and HTTP traffic destined for 172.20.0.0 will be permitted access.31. Which two steps describe how to create a functional physical connection between a router console and a terminal? (Choose two.)Use a crossover cable to connect the terminal serial port to the router console port.Use a rollover cable to connect the terminal NIC to the router console port.Use an RJ-45 to DB-9 adapter on the terminal serial port to connect to the cable going to the router console.Use a transceiver to connect a straight-through cable to the router console port.Use a straight-through cable to connect the router console port to the terminal NIC.Use a rollover cable to connect from a terminal serial port to the router console port.32. What critical information about the status of the router can be found in the outputs of both the show interfaces and show protocols commands? (Choose two.)the Layer 3 address of each configured interfacethe routing protocol configured to forward updates out of each interface the operational status of each interfacetraffic statistics for each interfacewhether the interface is configured as a DTE or DCE33.The following access list has been created to prevent traffic from the 192.0.2.63 host on the Sales LAN from accessing servers and hosts on the Payroll LAN.access-list 26 deny host 192.0.2.63access-list 26 permit anyRefer to the exhibit. Which group of commands will properly place the access list so that only the host on the Sales LAN is denied access to the 172.29.7.0 network but all other traffic is permitted?Payroll(config)# interface fa0/0Payroll(config-if)# ip access-group 26 outPayroll(config)# interface fa0/1Payroll(config-if)# ip access-group 26 outSales(config)# interface fa0/1Sales(config-if)# ip access-group 26 inSales(config)# interface fa0/0Sales(config-if)# ip access-group 26 out34.Refer to the exhibit. Assuming default metrics are used and the networkis fully converged, which path will RIP use to send a packet from Router A to Router F?A, D, E, FA, B, D, E, FA, C, D, E, G, FA, B, D, E, G, F35.Refer to the graphic. Communication is needed between the LAN connected to the fa0/0 interface of the Kansas router and the fa0/0 interface of the Maine router. All hosts on those LANs also need connectivity to the Internet. Which commands will allow this communication? (Choose three).Kansas(config)# ip route 192.168.6.0 255.255.255.0 172.18.64.2Kansas(config)# ip route 192.168.6.0 255.255.255.0 s0/1Kansas(config)# ip route 0.0.0.0 0.0.0.0 s0/1Maine(config)# ip route 192.168.6.0 255.255.255.0 172.18.64.1Maine(config)# ip route 0.0.0.0 0.0.0.0 s0/1Maine(config)# ip route 172.16.32.0 255.255.255.0 172.18.64.236. Why are interface descriptions used in router configurations? (Choose three).to enable support personnel to easily identify networks and customers that may be affected by a possible interface issueto provide comments on the interface without affecting the router functionalityto display access warning messages before users enter the interface configuration modeto eliminate the need to use IP addresses when using the ping and telnet commandsto identify the purpose and location of the interface37.A network administrator has enabled RIP on routersB andC in the network diagram. Which of the following commands will prevent RIP updates from being sent to Router A?A(config)# router ripA(config-router)# passive-interface S0/0B(config)# router ripB(config-router)# network 192.168.25.48B(config-router)# network 192.168.25.64A(config)# router ripA(config-router)# no network 192.168.25.32B(config)# router ripB(config-router)# passive-interface S0/0A(config)# no router rip38. What could a Cisco support technician learn from the IOS filename c2600-d-mz.121-3? (Choose three.)the format of the filethe RAM memory requirements of the filethe version number of the filethe size of the filethe device platform of the file39.While planning an IOS upgrade, the administrator issues the show version command. Based on the output in the graphic, what is the current IOS boot location?RAMNVRAMFlashROM40. A new technician must add boot system commands to one of the department routers. Which available commands will the router return as output when the command shown below is entered? (Choose two.)Router(config)# boot system ?RAMNVRAMIOSIP AddressTFTPFLASH41. From the running-config, the following configuration entries are displayed:Router(config)# line vty 0 2Router(config-line)# password g8k33prRouter(config-line)# loginWhat can be interpreted from the exhibited configuration? (Choose two.)Three Telnet lines are available for remote access.Two Telnet lines are available for remote access.Future configuration of the remaining Telnet lines will require the password to be set to g8k33pr.To login to the remote device, g8k33pr will be used as the Telnet and secret password.Remote access to this local router will require a Telnet password of g8k33pr.42. Which router component stores the information that is displayed by the show running-config command?flashNVRAMRAMROM43. What are two characteristics of the support for Telnet within Cisco IOS software? (Choose two.)Up to five separate Telnet lines are supported by default in standard edition IOS files.For security purposes, Telnet sessions are required to be established from the privileged mode.A router can host simultaneous Telnet sessions.Once established, a Telnet session can remain operational regardless of network status.Telnet tests wireless connectivity and does not require a physical connection between devices to gain remote access.44. Which router components and operations are correctly described? (Choose two.)RAM – stores the ARP cacheNVRAM – store the operating systemROM – stores the backup IOSPOST – verifies the validity of the running-configFlash – executes diagnostics at bootupDRAM – loads the bootstrap45.Given the output shown in the exhibit, in what order and location will the router search for the IOS if no boot system commands are found in the startup-config file?ROM, Flash, TFTP serverFlash, NVRAM, RAMROM, TFTP server, FlashRAM, Flash, NVRAMFlash, TFTP server, ROM46. What can a network administrator do to recover from a lost router password?perform a reload or resettelnet from another router and issue the show running-config command to view the passwordboot the router to ROM monitor mode and configure the router to ignore NVRAM when it initializesboot the router to bootROM mode and enter the b command to load the IOS manually47.Neither router in the exhibit has a host table or DNS available. The interfaces and passwords have been correctly configured. Which of the following commands will initiate a Telnet session? (Choose two.)Tottenham# telnet OxfordTottenham> telnet 198.18.139.1Oxford# connect 198.18.139.0Oxford> connect TottenhamOxford# telnet TottenhamOxford# 198.18.139.248. If a PC does not have network connectivity to a router, which router port can be used to establish communication?consoleEthernetserialVTY。

CCNA2 FINAL (A+B+C套)英文版

CCNA第二学期《Final Examinnation》英文A卷1 What are two functions of a router? (Choose two.)It forwards data packets toward their destination.It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface. It determines the best path based on the destination MAC address.It acts as an intersection between multiple IP networks.2 Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?ROMFlashSDRAMNVRAM3 Using default settings, what is the next step in the router boot sequence after the IOS loads from flash?Perform the POST routine.Search for a backup IOS in ROM.Load the bootstrap program from ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.4Refer to the exhibit. How many routes are ultimate routes?34575Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.6Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.7Refer to the exhibit. The network is configured for OSPF routing with default settings. The bandwidths have been configured correctly for each link. If the T1 link between router A and router E fails, what path will a packet from router A take to reach the LAN attached to router F when the network has converged?A, B, C, FA, B, C, E, FA, D, G, E, FA, D, G, H, F8 In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this network?D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/09 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network. Routers in a multipoint network that run a link-state protocol can exchange routing tables. Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.10Refer to the exhibit. Which option will provide the configuration that is needed for router R1 to dynamically learn routes to the 192.168.100.16/28, 192.168.100.32/28, and 192.168.100.48/28 subnetworks?with static routeswith a routed protocolwith a routing protocolwith directly connected routes11Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.12 Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route? RIPv1RIPv2OSPFEIGRP14 Which three routing metrics are correctly defined? (Choose three.)delay - the link speedreliability - the error rate on a linkload - the amount of traffic on a linkcost - the value to indicate preference for a routehop count - the path selected with the highest bandwidthbandwidth - the amount of time it takes a packet to travel a link15 Which two statements about routing protocols are accurate? (Choose two.)OSPF supports VLSM.RIPv1 supports VLSM.RIPv2 does not have a hop count limit.EIGRP supports discontiguous network designs.RIPv2 does not support discontiguous network designs.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge17 When connecting two devices, which situation would normally require the use of a crossover cable?connecting a host to a switchconnecting a switch to a routerconnecting a switch to a switchconnecting a host to a router console port18Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational?Switch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interface as a loopback interface.Set the encapsulation for the interface.19 Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet20 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration21Refer to the exhibit. When a static IP address is being configured on the host, what address shouldbe used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.122Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)The command was run on the router.ABCD is a non- CISCO device.Layer 3 connectivity between two devices exists.ABCD supports routing capability.ABCD is connected to the Fa0/0 interface of the neighboring device.23Refer to the exhibit. Which statement is true about the Ethernet interfaces shown in the network?A frame leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260.Hosts on 10.1.1.0/24 will use 172.16.3.1/24 as their default gateway.A packet will not be forwarded between R1 and R2 until the no shutdown command is issued on the Fa0/0 interface of R1.The Fa0/0 interface of R2 could be configured with the IP address 172.16.4.1/24 and still have connectivity on this link.24Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes25Refer to the exhibit. Pings are failing between HostA and HostB. The network administrator discovers that Router1 does not have a route to the 172.16.0.0 network. Assuming Router2 is configured correctly, which two static routes could be configured on Router1 to enable Host A to reach network 172.16.0.0? (Choose two.)ip route 172.16.0.0 255.255.0.0 S0/0ip route 172.16.0.0 255.255.0.0 S0/1ip route 172.16.0.0 255.255.0.0 192.168.0.1ip route 172.16.0.0 255.255.0.0 192.168.0.2ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/0ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/126Refer to the exhibit. How was the OSPF default gateway entry for R2 determined?Default routes are automatically injected by OSPF into all advertisements.A static default gateway route is defined in the configuration of R2.The default-information originate command is applied on R1.The ISP defines the gateway of last resort and automatically passes it to R1 and R2.The ip default-gateway command is applied on R2.27Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D28Refer to the exhibit. A network administrator configures a static route on router R1 to reach the 192.168.1.0/24 network. Which IP address should be used as the next-hop address in the ip route command?192.168.1.1192.168.2.1192.135.250.1192.135.250.229 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static route entry be altered to accommodate a topology change?Keep the existing static route and configure a new static route with the correct next hop IP address.Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address.Keep the existing static route, reload the router, and configure a new static route with the correctnext hop IP address.30Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of addresses and prefixes could be used to create an addressing solution with a minimum waste of IP addresses?答案：D31Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D32Refer to the exhibit. If the EIGRP routing protocol is used throughout the network, which IP address and mask prefix should be sent by router R1 to the Edge router as a result of manual summarization of LANs A, B, C, and D?192.168.4.0/20192.168.4.0/22192.168.4.0/24192.168.4.0/2633Refer to the exhibit. Routers RTRA and RTRB are running OSPF. What entry does RTRA add in the routing table when Serial 0/0/0 receives an update about the network that is attached to RTRB? O 172.16.7.0/30 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.0/24 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.0.0/16 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/034Refer to the exhibit. If RIPv1 is used as the routing protocol throughout the network, what RIPv1 route will router R1 advertise to router R3?10.0.0.010.1.0.010.1.1.010.1.2.035 Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Advertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.36Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?triggered updatespoison reverseholddown timerssplit horizon37 Which mechanism helps to avoid routing loops by advertising a metric of infinity?route poisoningsplit horizonhold-down timertriggered updates38Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)The missing information for Blank 1 is the command show ip route.The missing information for Blank 1 is the command debug ip route.The missing information for Blank 2 is the number 100.The missing information for Blank 2 is the number 120.The missing information for Blank 3 is the letter R.The missing information for Blank 3 is the letter C.39Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.Routes are being summarized by R1 but not by R2.40Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with defaultsettings, all routes are advertised on all routers, and the network is fully converged. Which path will the data take to travel between 172.16.1.0/24 and 192.168.100.0/24?It will travel via A, B, and C.It will travel via A, F, E, D, and C.It will travel via A, G, H, and C.The traffic will be load-balanced on all paths.41 Which multicast address does EIGRP use to send hello and updates packets?224.0.0.5224.0.0.6224.0.0.9224.0.0.1042 A router has EIGRP configured as the only routing protocol. In what way might EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies.It sends queries to adjacent neighbors until a new successor route is found.It immediately sends its entire routing table to its neighbors.It will set the metric for the failed route to infinity.43Refer to the exhibit. EIGRP 1 has been configured on R1. What is the effect of configuring the ip bandwidth-percent eigrp command?The EIGRP bandwidth routing metric will be reduced by 30%.EIGRP 1 protocol traffic will be restricted to 30% of the link bandwidth.Packets that are routed based on EIGRP routing table entries will be limited to 30% of the link bandwidth.EIGRP traffic will be permitted to burst for short periods to 30% above the configured link bandwidth.44Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.) All routes are stable.Each route has one feasible successor.The serial interface between the two routers is down.The administrative distance of EIGRP has been set to 50.The show ip eigrp topology command has been run on R1.45Refer to the exhibit. A network designer is testing a prototype of WAN connections. All of therouters in the exhibit are configured for OSPF routing. The design requires that the path between routers A and D through ISP-A is the primary and the path through ISP-B servers as a backup. The designer notices that router A has two equal-cost paths to the LAN on router D. How can the designer correct this problem?Issue a clock rate 2000000 interface command on S0/0/1 of router ISP-B.Change the default OSPF reference bandwidth on router A.Configure two static routes with administrative distances of 10.Use the bandwidth command to change the default bandwidth on the link to router B.46Refer to the exhibit. R1 and R2 are unable to establish an adjacency. What two configuration changes will correct the problem? (Choose two.)Set a lower priority on R2.Configure the routers in the same area.Set a lower cost on R2 compared to R1.Add a backup designated router to the network.Match the hello and dead timers on both routers.47Refer to the exhibit. If the router loopback interfaces, FastEthernet interfaces, and OSPF priorities are configured as shown, which router would win an OSPF DR election?ABCD48 Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address49Refer to the exhibit. What OSPF network statements are required for the router B to advertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 050Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?Reboot the routers.Change the OSPF process ID on all of the routers to 0.Check to see if the cable is loose between ORL and JAX.Check to see if CDP packets are passing between the routers.Use show and debug commands to determine if hellos are propagating.CCNA第二学期《Final Examinnation》英文B卷1 A network administrator is in charge of two separate networks that share a single building. What device will be required to connect the two networks and add a common connection to the Internet that can be shared?hubrouteraccess pointEthernet switch2 Which two router component and operation pair are correctly described? (Choose two.)DRAM - loads the bootstrapRAM - stores the operating systemFlash - executes diagnostics at bootupNVRAM - stores the configuration fileROM - stores the backup configuration filePOST - runs diagnostics on hardware modules3 A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt.Cisco IOS is missing from flash memory.The configuration file is missing from NVRAM.The POST process has detected hardware failure.4Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/245 Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?10.30.0.0/1610.30.15.0/2310.30.16.0/2410.30.16.32/2710.30.16.32/306Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.7 In a complex lab test environment, a router has discovered four paths to 192.168.1.0/24 via the use of the RIP routing process. Which route will be installed in the routing table after the discovery of all four paths?R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/18Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?It will forward the packet via the FastEthernet0/0 interface.It will forward the packet via the Serial0/0/0 interface.It will forward the packet via the Serial0/0/1 interface.It will drop the packet.9 A network administrator uses the RIP routing protocol to implement routing within an autonomous system. What are two characteristics of this protocol? (Choose two.)It uses the Bellman-Ford algorithm to determine the best path.It displays an actual map of the network topology.It offers rapid convergence in large networks.It periodically sends complete routing tables to all connected devices.It is beneficial in complex and hierarchically designed networks.10 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network. Routers in a multipoint network that run a link-state protocol can exchange routing tables. Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.11 Which two statements are true about classless routing protocols? (Choose two.)They can be used for discontiguous subnets.They can forward supernet routes in routing updates.They cannot implement classful routes in routing tables.They use only a hop count metric.They do not include the subnet mask in routing updates.12 Which statement is true regarding routing metrics?All routing protocols use the same metrics.EIGRP uses bandwidth as its only metric.Routers compare metrics to determine the best route.The larger metric generally represents the better path.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route? RIPv1RIPv2OSPFEIGRP14 You have been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have formed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.15Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?Router A will send the data via the A-D-E path that is listed in the routing table.Router A will load-balance the traffic between A-B-E and A-C-E.Router A will determine that all paths have equal metric cost.Router A will send the data through A-D-E and keep A-B-E and A-C-E as the backup paths.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge17 Which component is typically used to connect the WIC interface of a router to a CSU/DSU? V.35 cableRJ-45 adaptercrossover cablestraight-through cable18 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration19Refer to the exhibit. What are the effects of the exhibited commands on the router?All passwords are encrypted.Only Telnet sessions are encrypted.Only the enable password is encrypted.Only the enable password and Telnet session are encrypted.Enable and console passwords are encrypted.20Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.21Refer to the exhibit. Which two facts can be derived from this output? (Choose two.)Three network devices are directly connected to Router2.The serial interface between Router2 and Router3 is up.Router1 and Router3 are directly connected.Six devices are up and running on the network.Layer 3 functionality between routers is configured properly.22Refer to the exhibit. Which route in the routing table of R1 will be discarded by its neighboring router?192.168.2.0192.168.3.0192.168.4.0192.168.9.0192.168.10.0192.168.11.023Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert command on host A. Which two facts could be responsible for the output of this command? (Choose two.)The gateway for Host A is missing or improperly configured.The gateway for Host B is missing or improperly configured.The entry for 192.168.1.0/24 is missing from the routing table of R1.The entry for 192.168.1.0/24 is missing from the routing table of R2.The entry for 192.168.2.0/24 is missing from the routing table of R1.The entry for 192.168.2.0/24 is missing from the routing table of R2.24 In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing table25 What is the advantage of configuring a static route with an exit interface instead of a next-hop address?The router will perform a recursive lookup.This route will automatically be used as the gateway of last resort.The exit interface configuration consumes less router processing time.The exit interface configuration has an administrative distance value of 1.26Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D27 A static route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table? Change the routing metric for that route.Nothing. The static route will go away on its own.Change the administrative distance for that route.Remove the route using the no ip route command.28Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.What could be the cause of this problem?The FastEthernet interface on R1 is disabled.Autosummarization is enabled on R1.The serial interface S0/0/0 of R1 is administratively down.No static route or routing protocol is configured.29Refer to the exhibit. The users on the local network 172.16.1.0/24 complain that they are unable to connect to the Internet. What step should be taken to remedy the problem?A new static route must be configured on R1 with the R3 serial interface as the next hop.A new default route must be configured on R1 with the R3 serial interface as the next hop.The default route on R2 should be configured with the R3 serial interface as the next hop.The default route on R2 must be replaced with a new static route and the next hop should be the R1 FastEthernet interface.30 A network administrator needs to assign the very last usable IP address in the 172.24.64.0/18 network range to the router interface that serves this LAN. Which IP address should the administrator configure on the interface?172.16.128.154/18172.16.255.254/18172.24.64.254/18172.24.127.254/1831。

XX年CCNA第二学期第二章考试答案

以下是针对您未获得总分值的试题给出的反应。

某些交互式试题可能不显示您的答案。

分项分数：1哪个接口是包含用于管理24 个端口以太网交换机的IP 地址的默认位置？正确响应您的响应VLAN 1Fa0/0Fa0/1连接到默认网关的接口VLAN 99此试题参考以下领域的内容：Routing and Switching Essentials• 2.1.1 使用初始设置配置交换机2以下关于使用全双工快速以太网的陈述中，哪三项是正确的？〔请选择三项。

〕正确响应您的响应通过双向数据流改善了性能。

由于禁用了设备上的冲突检测功能，因此性能得到了改善。

节点以全双工单向数据流运行。

由于网卡可以检测到冲突，因此性能得到了改善。

全双工快速以太网在两个方向上提供100% 的效率。

由于网卡能更快速地处理帧，因此延迟减少了。

此试题参考以下领域的内容：Routing and Switching Essentials• 2.1.2 配置交换机端口3使用mdix auto 配置命令会对交换机上的以太网接口产生什么影响？正确响应您的响应自动检测双工设置自动检测接口速度自动检测铜电缆类型自动将第一个检测到的MAC 地址分配给接口此试题参考以下领域的内容：Routing and Switching Essentials• 2.1.2 配置交换机端口4在Cisco IOS 软件无法加载的情况下，网络管理员需要哪种类型的电缆将PC 与交换机连接才能恢复它？正确响应您的响应同轴电缆控制台电缆穿插电缆直通电缆因为交换机上没有运行Cisco IOS 软件，所以管理员需要使用控制台电缆将PC 连接到交换机控制台端口，比便将来自PC 的软件转移到交换机。

此试题参考以下领域的内容：Routing and Switching Essentials• 2.1.1 使用初始设置配置交换机5在对连接问题进展故障排除时，网络管理员发现交换机端口状态LED 在绿色和琥珀色之间跳转。

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CCNA Final2 完全答案：请参见图示。

对于发往192.168.2.0 的数据包，R2 会采取什么操作？A、它会丢弃数据包。

B、它会通过S0/0/0 接口转发数据包。

C、它会通过Fa0/0 接口转发数据包。

D、它会将数据包转发给R1。

答案：D2请参见图示。

R1 会使用哪一总结地址来向R2 通告其网络？A、192.168.1.0/24B、192.168.0.0/24C、192.168.0.0/22D、192.168.1.0/22答案：C3请参见图示。

尽管R2 已配置正确，但主机 A 还是无法访问Internet。

可以在R1 上配置哪两条可让主机 A 访问Internet 的静态路由？（选择两项。

）A、ip route 0.0.0.0 0.0.0.0 Fa0/0B、ip route 0.0.0.0 0.0.0.0 Fa0/1C、ip route 0.0.0.0 0.0.0.0 10.1.1.1D、ip route 0.0.0.0 0.0.0.0 10.1.1.2E、ip route 209.165.202.0 255.255.255.0 10.1.1.1答案：B D4请参见图示。

网络管理员已按图示配置了R1，并且所有接口都运作正常。

但从R1 ping 172.16.1.1 时失败。

造成此问题的原因可能是什么？A、R1 上的串行接口配置有误。

B、默认路由配置有误。

C、必须在R1 上发出default-information originate 命令。

D、必须在R1 上禁用自动总结。

答案：B5请参见图示。

所有接口都已编址，并且运行正常。

网络管理员在主机 A 上运行了tracert 命令。

得到这种输出的原因可能是什么？（选择两项。

）A、主机A 缺少网关或配置不正确。

B、主机B 缺少网关或配置不正确。

C、R1 的路由表中缺少192.168.1.0/24 的条目。

D、R2 的路由表中缺少192.168.1.0/24 的条目。

E、R1 的路由表中缺少192.168.2.0/24 的条目。

F、R2 的路由表中缺少192.168.2.0/24 的条目。

答案：DE6请参见图示。

从主机 A 到主机 B 的ping 成功，但从主机 A ping 在Internet 上正常运行的主机却失败了。

此问题的原因是什么？A、R1 的快速以太网接口被禁用。

B、其中一条默认路由配置有误。

C、未在这两台路由器上配置路由协议。

D、主机A 上尚未配置默认网关。

答案：B7网络管理员使用RIP 路由协议在一个自治系统内实施路由。

下列哪两项是该协议的特征？（选择两项。

）A、使用贝尔曼-福特算法确定最佳路径。

B、显示确切的网络拓扑图。

C、可以使大型网络快速收敛。

D、定期将完整的路由表发送给所有连接的设备。

E、在复杂网络和分层设计网络中很有用。

答案：AD8请参见图示。

两台路由器无法建立相邻关系。

此问题的原因可能是什么？A、这两台路由器连接在多路访问网络中。

B、这两台路由器上的hello 间隔和dead 间隔不同。

C、它们的OSPF 路由器ID 不同。

D、它们的进程ID 不相同。

答案：B9在两台路由器能够使用OSPF 形成邻居邻接关系之前必须完成哪两项任务？（选择两项。

）A、路由器必须选举出指定路由器。

B、路由器必须在网络类型方面达成一致。

C、路由器必须使用相同的dead 时间间隔。

D、路由器必须交换链路状态请求。

E、路由器必须交换数据库描述数据包。

答案：ＢＣ10下列关于链路状态路由协议的陈述，哪两项是正确的？（选择两项。

）A、运行链路状态协议的路由器可以建立完整的网络拓扑。

B、多点网络中运行链路状态协议的路由器可以交换路由表。

C、路由器仅使用跳数来作出路由决定。

D、仅使用最短路径优先算法。

E、使用水平分割避免路由环路。

答案：AD11请参见图示。

下列关于Router1 路由表的陈述，哪三项是正确的？（选择三项。

）到网络172.16.0.0 的路由的AD 为156160。

A、FastEthernet0/0 具有到达网络192.168.0.16 的最佳路径。

B、EIGRP 路由的AD 已经手动更改为默认值以外的其它值。

C、Router1 正同时运行着EIGRP 和OSPF 路由过程。

D、仅能通过默认路由到达网络172.17.0.0。

E、尚未配置任何默认路由。

答案：BCE12请参见图示。

所有路由器都运行RIPv1。

10.1.1.0/29 和10.1.1.16/29 这两个网络无法互相访问。

此问题的原因可能是什么？A、因为RIPv1 是无类协议，不支持该访问。

B、RIPv1 不支持不连续网络。

C、RIPv1 不支持负载均衡。

D、RIPv1 不支持自动总结。

答案：B13请参见图示。

10.4.0.0 网络发生故障。

哪种机制可防止R2 接收有关10.4.0.0 网络的错误更新信息？A、水平分割B、抑制计时器C、路由毒化D、触发更新答案：A14请参见图示。

尝试诊断网络中的路由问题时，网络管理员运行了debug ip rip 命令。

根据此命令的输出，我们可以得出什么结论？A、路由器正在广播RIP 更新。

B、路由器将无法ping 通192.168.1.2。

C、路由器直接连接至网络172.16.1.0 /24。

D、路由器有两个接口参与RIP 过程。

E、路由器将从接口Serial0/0/1 转发192.168.1.0 的更新。

答案：D15请参见图示。

当数据包发往哪两个网络时需要路由器执行递归查找？（选择两项。

）A、10.0.0.0/8B、64.100.0.0/16C、128.107.0.0/16D、172.16.40.0/24E、192.168.1.0/24F、192.168.2.0/24答案：AF16下列关于RIPv1 协议的叙述，哪一项是正确的？A、是一种链路状态路由协议。

B、路由更新中不包含子网信息。

C、使用DUAL 算法将备用路由插入拓扑表中。

D、在路由器上使用无类路由作为默认的路由方式。

答案：B17下列哪两项用于在配置OSPF 路由进程时确定路由器ID？（选择两项。

）A、第一个快速以太网接口的IP 地址B、任何逻辑接口的最大IP 地址C、任何物理接口的最大IP 地址D、默认网关的IP 地址E、优先级为1 的任何物理接口答案：BC18请参见图示。

路由器R2 经过适当配置，并且所有接口均运行正常。

最近安装了路由器R1。

主机A 无法ping 通主机B。

下列哪个步骤可解决此问题？A、使用R1 串行接口的IP 地址在R1 上配置一条静态路由。

B、使用R1 上的送出接口Fa0/0 在R1 上配置一条默认路由。

C、使用R2 S0/0/0 的IP 地址在R1 上配置一条静态路由。

D、使用R2 Fa0/0 的IP 地址在R1 上配置一条默认路由。

答案：C19路由器通过EIGRP 和RIP 协议获知到两条通往远程网络的等价路径。

两个协议都采用其默认配置。

哪条通往远程网络的路径会被添加到路由表中？A、通过EIGRP 获知的路径B、通过RIP 获知的路径C、度量值最大的路径D、负载均衡的两条路径都会添加到路由表中答案：A20下列哪两项是路由器的功能？（选择两项。

）A、路由器会向目的地转发数据包。

B、如果TTL 值为0，则路由器会将数据包转发到目的地。

C、将数据包转发到送出接口前，路由器会更改数据包的目的IP 地址。

D、路由器会根据目的MAC 地址确定最佳路径。

E、路由器相当于多个IP 网络的汇合点。

答案：AE21请参见图示。

在R1 上运行了show cdp neighbors 命令。

从输出中可以推断出新检测到的设备具有哪两项情况？（选择两项。

）A、ABCD 是连接到R1 的一台路由器。

B、ABCD 是连接到R1 的一台非CISCO 设备。

C、该设备连接到R1 的Serial0/0/1 接口。

D、R1 连接到设备ABCD 的S0/0/1 接口。

E、ABCD 不支持交换功能。

答案：AC22请参见图示。

从此输出可以得到什么结论？（选择两项。

）A、三台网络设备直接连接到Router2。

B、Router2 和Router3 之间的串行接口为开启状态。

C、Router1 和Router3 直接相连。

D、六台设备处于工作状态且在网络中运作。

E、路由器之间的第3 层功能已正确配置。

答案：AB23请参见图示。

R2 已正确配置。

网络管理员已配置了R1，如图所示。

下列有关R1 转发路由信息的陈述，哪两项是正确的？（选择两项。

）A、R1 会转发子网192.168.100.0/30 的路由信息。

B、R1 不会转发子网192.168.100.4.0/30 的路由信息。

C、R1 会转发管理距离设置为50 的路由信息。

D、R1 会转发网络192.168.100.0/24 的总结路由信息。

E、R1 会将子网10.10.10.0/30 的路由信息从串行接口转发出去。

答案：AB24下列路由器组件和操作的配对中，哪两项是正确的？（选择两项。

）A、DRAM - 加载bootstrapB、RAM - 存储操作系统C、闪存- 启动时执行诊断D、NVRAM - 存储配置文件E、ROM - 存储备份配置文件F、POST - 运行硬件模块诊断答案：DF25请参见图示。

要完成配置需要哪两个组件？（选择两项。

）A、交叉电缆B、DCE 设备C、DTE 设备D、调制解调器E、V.35 电缆答案：CE26路由器重新启动并进入设置模式。

此问题的原因是什么？A、IOS 映像损坏。

B、闪存中缺少Cisco IOS。

C、NVRAM 中缺少配置文件。

D、POST 过程检测到硬件故障。

答案：C27请参见图示。

主机 A 无法访问Internet。

此问题的原因是什么？A、主机A 的IP 地址不正确。

B、主机A 的默认网关不正确。

C、两台路由器的Fa0/1 接口配置了不同的子网。

D、R1 Fa0/0 的子网掩码不正确。

答案：C28请参见图示。

网络管理员想要减小R1 的路由表的大小。

哪项R1 路由表的部分信息可代表对R2 各子网进行的路由总结，且不包含任何多余子网？A、10.0.0.0/16 is subnetted, 1 subnetsD 10.5.0.0[90/205891] via 192.168.1.2, S0/0/0B、10.0.0.0/24 is subnetted, 4 subnetsD 10.5.0.0[90/205198] via 192.168.1.2, S0/0/0C、10.0.0.0/22 is subnetted, 1 subnetsD 10.5.0.0[90/205901] via 192.168.1.2, S0/0/0D、10.0.0.0/8 is subnetted, 4 subnetsD 10.5.0.0[90/205001] via 192.168.1.2, S0/0/0答案：C29请参见图示。