CCNA 实验题 EIGRP排错对照翻译

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ccna第二章答案

1. Which statements correctly identify the role of intermediary devices in the network? (Choose three.)determine pathways for data 确定数据通路initiate data communicationsretime and retransmit data signals 重分发originate the flow of datamanage data flows 管理数据final termination point for data flow2. Select the statements that are correct concerning network protocols. (Choose three.)define the structure of layer specific PDU'sdictate how to accomplish layer functionsoutline the functions necessary for communications between layers limit the need for hardware compatibilityrequire layer dependent encapsulationseliminate standardization among vendors3. What are two functions of encapsulation? (Choose two.)tracks delay between end devicesenables consistent network paths for communicationallows modification of the original data before transmissionidentifies pieces of data as part of the same communicationensures that data pieces can be directed to the correct receiving end device4. What is a primary function of the trailer information added by the data link layer encapsulation?supports error detection 支持错误检测‘ensures ordered arrival of dataprovides delivery to correct destinationidentifies the devices on the local networkassists intermediary devices with processing and path selection5. Which statements correctly identify the role of intermediary devices in the network? (Choose three.)determine pathways for datainitiate data communicationsretime and retransmit data signalsoriginate the flow of datamanage data flowsfinal termination point for data flow6. What is a PDU?corruption of a frame during transmissiondata reassembled at the destinationretransmitted packets due to lost communicationa layer specific encapsulation 一个具体的封装层7. Which characteristic correctly refers to end devices in a network?manage data flowsoriginate data flow 原数据流retime and retransmit data signalsdetermine pathways for data8.Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"the destination devicean end devicean intermediate devicea media device9.Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown?(Choose three.)Network A -- WANNetwork B -- WANNetwork C -- LANNetwork B -- MANNetwork C -- WANNetwork A -- LAN10. Which three statements best describe a Local Area Network (LAN)? (Choose three.)A LAN is usually in a single geographical area.The network is administered by a single organization.The connection between segments in the LAN is usually through a leased connection.The security and access control of the network are controlled by a service provider.A LAN provides network services and access to applications for users within a common organization.Each end of the network is generally connected to a Telecommunication Service Provider (TSP).11.Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?pipingPDUstreamingmultiplexingencapsulation12. What is the primary purpose of Layer 4 port assignment?to identify devices on the local mediato identify the hops between source and destinationto identify to the intermediary devices the best path through the network to identify the source and destination end devices that are communicating to identify the processes or services that are communicating within the end devices13. What device is considered an intermediary device?1．file serve2.IP phone ptop 4.printer 5.switch14.Refer to the exhibit. Which term correctly identifies the device type that is included in the area B? sourceendtransferintermediary 中间设备15.Refer to the exhibit. What type of network is shown?WANMANLANWLAN16. Which layer encapsulates the segment into packets?physicaldata linknetwork 网络层封装的是数据包transport17. What can be identified by examining the network layer header?the destination device on the local mediathe destination host address 网络层头部封装目的主机的地址the bits that will be transferred over the mediathe source application or process creating the data18. What is the purpose of the TCP/IP Network Access layer?path determination and packet switchingdata presentationreliability, flow control, and error detectionnetwork media control 接入层控制网络媒体the division of segments into packets19. During the encapsulation process, what occurs at the data link layer? No address is added.The logical address is added.The physical address is added. 数据链路层添加一个物理地址The process port number is added.20.Refer to the exhibit. Which set of devices contains only end devices? A, C, DB, E, G, HC, D, G, H, I, JD, E, F, H, I, JE, F, H, I, J21. What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?4physical, network, application, data link, presentation, session, transportapplication, physical, session, transport, network, data link, presentationapplication, presentation, physical, session, data link, transport, networkapplication, presentation, session, transport, network, data link, physicalpresentation, data link, session, transport, network, physical, application22. Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)34NetworkTransportPhysicalData Link TCP/IP 工作在第一层和第二层Session。

CCNA综合试卷

CCNA集训队综合试卷一、选择题( 40分)1．交换机进行数据转发时，依据的是（）。

（A）IP地址（B）MAC地址（C）主机名称（D）网络标识2．对交换机配置时，应将配置线缆插入（）。

（A）Ethernet口（B）AUX口（C）Serial口（D）Console口3．下列哪个服务提供域名到IP地址的解析服务（）。

A．DNS B．DHCP C．WWW D．SMTP4．哪种路由选择协议使用最短路径优先算法?( )A. 距离向量B. 链路状态C. 混合D. 以上都不对5．不支持可变长子网掩码的路由协议是( )A. RIP v1B. RIP v2C. OSPFD. IS-IS 6．Cisco的专用协议有( )A. RIPB. BGPC. EIGRPD. OSPF7．默认时，管理距离大于90的有( ) （本题多选）A. RIPB. IGRPC. OSPFD. EIGRP 8．路由协议存在路由自环问题的是( )A. RIPB. BGPC. OSPFD. IS-IS9．MAC地址与IP地址的长度分别是（）。

（A）48位、48位（B）32位、32位（C）48位、32位（D）32位、48位10．以下网络互连设备中，属于物理层的设备是（）。

（A）集线器（B）交换机（C）路由器（D）网关11．下列IP地址属于标准B类IP地址的是（）（A）172.19.3.245/24 （B）190.168.12.7/16 （C）120.10.1.1/16 （D）10.0.0.1/16 12．以太网交换机组网中有环路出现也能正常工作，则是由于运行了（）协议。

（A）801.z （B）802.3 （C）Trunk （D）Spanning Tree13．对IP地址为192.168.2.1的主机不停发送数据包的命令ping命令是（）。

（A）ping 192.168.2.1 –n （B）ping 192.168.2.1 -i（C）ping 192.168.2.1 –t （D）ping 192.168.2.1 -a14．要查看交换机端口加入VLAN的情况，可以通过（）命令来查看（A）show vlan （B）show running-config （C）show vlan.dat （D）show interface vlan 15．下列属于路由表的产生方式的是（）。

1-1简介思科CCNA认证的体系结构

任务1.2
（3）IP地址管理（IPv4/IPv6）部分描述使用私有或公共IP地址进行IPv4地址管理的操作及其必要性。识别恰当的IPv6地址框架以满足LAN/WAN环境下地址管理需求。采用VLSM识别恰当的IPv4地址管理框架以及满足LAN/WAN环境下地址管理需求。描述与IPv4一起运行IPv6的技术要求，例如双栈协议。描述IPv6地址：全球单播、组播、链路本地地址、唯一本地地址、EUI64、自动配置。
任务1.1
简介思科的认证体系等级CCNA/CCNP/CCIE
思科认证体系结构基本上可以分成3个等级：“A”、“P”、“E”。 “A”即Associate的缩写，在大中华区翻译为思科认证的网络工程师，但是笔者认为Associate更精准的翻译应该是预备工程师，或者工程师助理，因为它的英文本意带有“副级”职务的意思，它属于思科认证体系结构中的初级职称；“P”即Professional的缩写，在大中华区翻译为思科认证资深网络工程师，它属于思科认证体系结构中的中级职称；“E”即 Expert的缩写，在大中华区翻译为思科认证互联网专家，它属于思科认证体系结构中的最高职称，也是最具备实战工作意义的职称。关于3个认证级别的示意图如图1.1所示。
图1.3 关于CCNA的考试信息
任务1.2
考生报名方式
如果选择了相关的思科认证培训中心，则可以通过所在的培训中心注册和预约考试，这样可以省很多事。如果没有参加相关的思科认证培训，而是通过自学的方式来参加考试，则可以直接通过网站（VUE中国的官方网站）来进行注册与付费，通常在这种情况下需要使用信用卡以美元的价格支付考试费。还可以通过拨打VUE中国区的电话400-810-6035来注册与预约考试。
任务1.2

CCNA题库实验题

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RTR_1#show run ! ! interface FastEthernet0/0 ip address 192.168.77.33 255.255.255.252 ! interface Serial1/0 ip address 198.0.18.6 255.255.255.0 ! ! interface Serial0/0 ip address 192.168.36.13 255.255.255.252 clockrate 64000 ! interface Serial0/1 ip address 192.168.60.25 255.255.255.252 clockrate 64000 ! !
router eigrp 22 network 192.168.77.0 network 192.168.60.0 no auto-summary !
RTR_2#show ip route 192.168.60.0/28 is variably subnetted, 2 subnets C 192.168.60.80 is directly connected, FastEthernet1/0 C 192.168.60.64 is directly connected, FastEthernet0/1 192.168.77.0/30 is subnetted, 1 subnets C 192.168.77.32 is directly connected, FastEthernet0/0
!
router eigrp 212 network 192.168.60.0 !

CCNA第三学期中英文对照练习3

1、下列哪两种说法正确描述了VLAN的优点？（选择两项。

）45Which two statements describe the benefits of VLANs? (Choose two.)VLAN通过调节流量控制和窗口大小来提升网络性能。

VLANs improve network performance by regulating flow control and window size.VLAN使交换机可通过VLAN ID过滤将数据包路由到远程网络。

VLANs enable switches to route packets to remote networks via VLAN ID filtering.VLAN通过减少交换机上所需的物理端口数量来降低网络开销。

VLANs reduce network cost by reducing the number of physical ports required on switches. VLAN通过识别有权访问敏感数据和应用程序的用户来提升网络安全性。

VLANs improve network security by isolating users that have access to sensitive data and applications.VLAN将网络划分为较小的逻辑网络，这降低了网络对广播风暴的敏感性。

VLANs dividea network into smaller logical networks, resulting in lower susceptibility to broadcast storms.2、默认交换机配置中的VLAN1有哪两项特点？（选择两项。

）23What are two characteristics of VLAN1 in a default switch configuration? (Choose two.)VLAN1应重命名。

P4S CCNA802 ver 4[1].28(难题及实验)

本部分题库解析由武汉艾迪飞CCIE实验室论坛收集整理根据P4S CCNA802 v4.28版本讲解及制作Hotspot: Topology Based QuestionsQuestion 1:If router has a packet destination address 192.168.1.255. What describes the operation of the network?Answer:R1 will drop this packet because it is not a valid ip addressExplanation:The destination IP address 192.168.1.255 is broadcast address of thenetwork 192168.1.0 /24 on router R1.Network Address: 192.168.1.0 subnet mask: 255.255.255.0Network valid host range: 192.168.1.1 – 192.168.1.254Broadcast Address : 192.168.1.255Since router (R1) received a packet with destination IP address (192.168.1.255) which is broadcast address so it simply discards the packet as Forwarding broadcast packet can lead to severe storms of packets, and if uncontrolled could lead to network overload.Question 2:Users on the 192.168.1.0 /24 network must access files located on the server 1. What route could be configured on router R1 for the file requests to reach the server ?Answer:ip route 0.0.0.0 0.0.0.0 s 0/0/0Explanation:To enable users on 192.168.1.0 network to access files on server1, we need to establish a default static route.Static route syntax:ip route prefix mask {ip-address interface-type interface-number [ip-address]} [distance] [name] [permanent track number] [tag tag]From the options provided for this question the correct default static route is ip route0.0.0.0 0.0.0.0 S 0/0/0PS: As per best practices static route to server1 on R1 should have beenip route 209.165.200.0 255.255.255.0 209.165.100.200(or)ip route 209.165.200.0 255.255.255.0 s 0/0/0Question 3:When a packet is sent from Host1 to Server1,in how many different frames will the packet be encapsulated as it is sent across the internetwork?Answer:3Explanation:First: Host1 encapsulates the packet into frames and forwards to the switch. Switch in turn forwards the same frame to router R1.Second: Router R1 receives the frame on one interface and it is encapsulates into new packet once it leaves the router R1 towards the direction of server1. Third: R2 receives this packet and it also encapsulates the frame into new packet when it is forwarded to server1 on different interface of R2. Therefore the packet is sent using three different frames to reach from Host1 to server1.Question 4:What must be configured on the network in order for users on the internet to view web pages located on web server2?Answer:On router R1, configure a NAT to translate address on 209.165.100.0 to 192.168.1.0 network.Question 5:The router address 192.168.1.250 is the default gateway for both web server2 and host 1. What is the correct subnet mask for this network?Answer:255.255.255.0Explanation:Given subnet mask for this network is 255.255.255.0 based on the exhibit.To find the correct subnet mask for this network based on number of devices shown in the exhibit that are already configured with IP address and by not wasting IP addresses scheme.The network 192.168.1.0 consists of only three devices as per the exhibits which are configured with IP address.R1(fa 0/0) : 192.168.1.250 ( default gateway as per the question)Host1: 192.168.1.10Web server 2: 192.168.1.106correct subnet mask that will cover all above IP address is 255.255.255.0( Thanks to Helmut who identified the exhibit IP address to be considered forthis selection of correct subnet mask)CCNA 640-802: NAT SIMQuestion:A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 –192.168.100.30 .CLICK ON IMAGE TO VIEWNAT SIM Configuration:The following configuration translates between inside hosts (Weaver LAN) addressed from 192.168.100.16 /28 network (192.168.100.17 – 192.168.100.30) to the globally unique pool of address provided by ISP 198.18.184.105 –198.18.184.110 /29.Weaver>enableWeaver#configure terminalBefore starting the NAT configuration verify that router hostname currently configured is weaver. If not change hostname to Weaver using the command Router(config)#hostname weaverStep1:Create an access-list to match all the Weaver LAN address that need to be the candidates for NAT translationsWeaver(config)#access-list 10 permit 192.168.100.16 0.0.0.15Step2:Create a NAT Pool with pool name isp_adr and specify the pool address range provided by ISP with their netmask.Weaver(config)#ip nat pool isp_adr 198.18.184.105 198.18.184.110netmask 255.255.255.248Step3:Packets that match access-list 10 will be translated to an address from the pool called "isp_adr".Overload keyword specify to use Port based NATing to support all the Weaver LAN address range.Weaver(config)#ip nat inside source list 10 pool isp_adr overloadSIM Question already provides that appropriate interfaces have been configured for NAT Inside and NAT Outside statements.For your information configuration would have been like thisWeaver(config)#interface fastethernet 0/0Weaver(config-if)#ip nat insideWeaver(config)#interface serial 0/0Weaver(config-if)#ip nat outsideFunctionality Test:Our requirements are to allow the hosts (Weaver LAN) the ability to communicate with the Internet. For this test, we ping the Internet device (ISP router S0/1) from Host for testing.Step1:Go to host for testing:C:\>ping 192.0.2.114PING should be success to 192.0.2.114 since SIM question provides that static route is already configured on router.Step2:On console of router (Weaver) :Issue show ip nat translation command to verify the NAT translations. Sample output:Considering host for testing IP address is 192.168.100.17weaver# show ip nat translationPro Inside global Inside local Outside local Outside globalicmp 198.18.184.105:434 192.168.100.17:434 192.0.2.113:434 192.0.2.114:434 icmp 198.18.184.105:435 192.168.100.17:435 192.0.2.113:435 192.0.2.114:435 icmp 198.18.184.105:436 192.168.100.17:436 192.0.2.113:436 192.0.2.114:436icmp 198.18.184.105:437 192.168.100.17:437 192.0.2.113:437 192.0.2.114:437 icmp 198.18.184.105:438 192.168.100.17:438 192.0.2.113:438 192.0.2.114:438 Any Questions on SIMULATOR welcomed.Best of LUCK to your CCNA EXAMTopology Based LabLAB QUESTION:This topology contains 3 routers and 1 switch. Complete the topology.Drag the appropriate device icons to the labeled DeviceDrag the appropriate connections to the locations labeled Connections.Drag the appropriate IP addresses to the locations labeled IP address (Hint:use the given host addresses and Main router information)To remove a device or connection, drag it away from the topology.Use information gathered from the Main router to complete the configuration of any additional routers. No passwords are required to access the Main router . The config terminal command has been disabled for the HQ router. The router does not require any configuration.Configure each additional router with the followingConfigure the interfaces with the correct IP address and enable the interfaces.Set the password to allow console access to consolepwSet the password to allow telnet access to telnetpwSet the password to allow privilege mode access to privpwNote: Because routes are not being added to the configurations, you will not be able to ping through the internetwork.All devices have cable autosensing capabilities disabled.All hosts are PC’sANSWER:The question tells us that they are 3 routers and 1 Switch.Drag the appropriate device icons to the labeled DeviceDevice Router (1) and Router (2) are connected to main router directly.We can confirm this because the other Device labeled has Fa 0/2 and Fa 0/4interfaces therefore this device is a switch.Drag the appropriate connections to the locations labeledConnections.1. The Main router is connected over serial link to Router (2) because on Router (2) the exhibit provide S 0/0 IP address icon towards Main router.2. Router (1) is connected to Main router using a crossover cable. We require a crossover cable to connect two similar devices.3. To connect host A directly to Router (1) fast ethernet 0/1 we need a crossover cable4. Straight-through cable is used to connect a router (2) and switch together. Drag the appropriate IP addresses to the locations labeled IPaddress (Hint: use the given host addresses and Main routerinformation)Host A IP address given 192.168.152.129 /28.Host C IP address given 192.168.152.225 /28/28 = 11111111. 11111111.11111111.11110000= 255.255.255.240Subnet mask is 255.255.255.240Various subnet networks and its valid IP address ranges for the above subnet mask1 – 1516 – 3132 – 4748 – 6364 – 7980 – 9596 – 111112 -127128 – 143 (Host A IP address is part of this subnet network IP address range, So Router (1)Fa 0/1 address is 192.168.152.142)144 – 159160 – 175176 – 191192 – 207208 – 223224 – 239 (Host C IP address is part of this subnet network IP address range, Router (2)Fa 0/0 address is 192.168.1.238)240 – 255Use the console of Main router and issue show running-config commandat enable mode to verify the existing IP address configured on Main router Serial interface so has to identify the Network used in connecting Router (2) over serial link and depending on the network choose the appropriate IP address for S0/0 Router(2).Similarly verify the Fast Ethernet interface IP address configuration on main router and select a IP address for Router (1) fa 0/0 it should be from same network address range.Configure Router (1) and Router (2) with the followingconfiguration:Configure the interfaces with the correct IP address and enable the interfaces.Router (1): ConfigurationRouter1>enableRouter1#configure terminalRouter1(config)#interface fa 0/0Assigns IP address to Fa 0/0 and correct subnet maskRouter1(config-if)#ip address 192.168.152.190 255.255.255.240Enables the interfaceRouter1(config-if)#no shutdownRouter1(config-if)#interface fa 0/1Assigns IP address to Fa 0/1 and correct subnet maskRouter1(config-if)#ip address 192.168.152.142 255.255.255.240Enables the interfaceRouter1(config-if)#no shutdownSet the console, telnet and privilege mode access password asfollowsConsole: consolepw ; Telnet: telnetpw ; Privilege mode: privpwTo set console passwordRouter1(config)#line console 0Router1(config-line)#password consolepwRouter1(config-line)#loginRouter1(config-line)#exitTo set telnet passwordRouter1(config)#line vty 0 4Router1(config-line)#password telnetpwRouter1(config-line)#loginRouter1(config-line)#exitTo set privilege mode passwordRouter1(config)#enable password privpwRouter (2): ConfigurationRouter2>enableRouter2#configure terminalRouter2(config)#interface fa 0/0Assigns IP address to Fa 0/0 and correct subnet maskRouter2(config-if)#ip address 192.168.152.238 255.255.255.240 Enables the interfaceRouter2(config-if)#no shutdownRouter2(config-if)#interface serial 0/0Assigns IP address to serial 0/0 and correct subnet mask Router2(config-if)#ip address 192.168.152.174 255.255.255.240 Enables the interfaceRouter2(config-if)#no shutdownSet the console, telnet and privilege mode access password as followsConsole: consolepw ; Telnet: telnetpw ; Privilege mode: privpwSimilar configuration needs to be done for Router (2) to set the passwords for console, telnet and privilege mode as we did for Router(1).Implement and verify WAN linksCCNA (640-802) topic Implement and Verify WAN links answers thequestions from this topic in exam.Question 1:A default Frame Relay WAN is classified as what type of physical network? A: point-to-pointB: broadcast multi-accessC: nonbroadcast multi-accessD: nonbroadcast multipointE: broadcast point-to-multipointAnswers: CQuestion 2:The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command?A: This command should be executed from the global configuration mode. B: The IP address 10.121.16.8 is the local router port used to forward data. C: 102 is the remote DLCI that will receive the information.D: This command is required for all Frame Relay configurations.E: The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.Answers: EExplanation:When the frame-relay map command is included in the configuration with the broadcast keyword, it turns Frame Relay network as a broadcast network.Question 3:Refer to the exhibit. Which statement describes DLCI 17?A: DLCI 17 describes the ISDN circuit between R2 and R3.B: DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.C: DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.D: DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.Answers: CQuestion 4:How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?A: Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface.B: Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.C: Configure many sub-interfaces on the same subnet.D: Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces.Answers: AQuestion 5:What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)A:VLAN supportB:compressionC:authenticationD:sliding windowsE:multilink supportF:quality of serviceAnswers: B, C, EQuestion 6:Refer to the exhibit. What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?A: The Serial0/0 interface is passing traffic.B: The DLCI 100 was dynamically allocated by the router.C: The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server.D: The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud.E: The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP.Answers: EExplanation:Inverse ARP allows a Frame Relay network to discover the protocol address associated with the virtual circuit dynamically.Question 7:Which of the following describes the roles of devices in a WAN? (Choose three.)A:A CSU/DSU terminates a digital local loop.B:A modem terminates a digital local loop.C:A CSU/DSU terminates an analog local loop.D:A modem terminates an analog local loop.E:A router is commonly considered a DTE device.F:A router is commonly considered a DCE device.Answers: A, D, EQuestion 8:Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three.)A:HDLCB:EthernetC:Token RingD:PPPE:FDDIF:Frame RelayAnswers: A, D, FQuestion 9:The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?A: The Gallant router has the wrong LMI type configured.B: Inverse ARP is providing the wrong PVC information to the Gallant router. C: The S3 interface of the Steele router has been configured with theframe-relay encapsulation ietf command.D: The frame-relay map statement in the Attalla router for the PVC to Steele is not correct.E: The IP address on the serial interface of the Attalla router is configured incorrectly.Answers: DExplanation:In above exhibit we need to look at the status of each PVC to identify the problem.At atlanta we find the show command for first Map status deleted. Which is the PVC to Steele because the next map statement in show command is for Gallant and its status is active.Question 10:Which of the following are key characteristics of PPP? (Choose three.)A:can be used over analog circuitsB:maps Layer 2 to Layer 3 addressC:encapsulates several routed protocolsD:supports IP onlyE:provides error correctionAnswers: A, C, EQuestion 11:A Cisco router that was providing Frame Relay connectivity at a remote site was replaced with a different vendor's frame relay router. Connectivity is now down between the central and remote site. What is the most likely cause of the problem?A: incorrect IP address mappingB: mismatched encapsulation typesC: incorrect DLCID: mismatched LMI typesAnswers: BQuestion 12:Refer to the exhibit. The network administrator must complete the connection between the RTA of the XYZ Company and the service provider. To accomplish this task, which two devices could be installed at the customer site to provide a connection through the local loop to the central office of the provider? (Choose two.)A:WAN switchB:PVCC:ATM switchD:multiplexerE:CSU/DSUF:modemAnswers: E, FQuestion 13:When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined?A: It is supplied by the CSU/DSU.B: It is supplied by the far end router.C: It is determined by the clock rate command.D: It is supplied by the Layer 1 bit stream timing.Answers: AImplement, verify, and troubleshoot NAT and ACLsCCNA (640-802) exam topic Implement, verify, and troubleshoot NATand ACLs in a medium-size Enterprise branch office network .Question1:What are two reasons that a network administrator would use access lists? (Choose two.)A:to control vty access into a routerB:to control broadcast traffic through a routerC:to filter traffic as it passes through a routerD:to filter traffic that originates from the routerE:to replace passwords as a line of defense against security incursions Answers: A, CQuestion 2:Refer to the exhibit. The access list has been configured on the S0/0 interface of router RTB in the outbound direction. Which two packets, if routed to the interface, will be denied? (Choose two.)access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnetaccess-list 101 permit ip any anyA:source ip address: 192.168.15.5; destination port: 21B:source ip address:, 192.168.15.37 destination port: 21C:source ip address:, 192.168.15.41 destination port: 21D:source ip address:, 192.168.15.36 destination port: 23E:source ip address: 192.168.15.46; destination port: 23F:source ip address:, 192.168.15.49 destination port: 23Answers: D, EExplanation:access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnetaccess-list 101 permit ip any anyThe above two access-list statements are configured on RTB router and placed in outbound direction on S 0/0 interface.First ACL statement denies all telnet ( port 23) connections from source address range 192.168.15.32 - 192.168.15.47 to any destination hosts.Since we need to find the two packets that will be denied when routed outside s 0/0 interface .source ip address:, 192.168.15.36 destination port: 23 this matches the ACL statement so this packet is denied.source ip address: 192.168.15.46; destination port: 23also matches the ACL statment so this packet is denied.Question 3:Refer to the exhibit. Why would the network administrator configure RA in this manner?A: to give students access to the InternetB: to prevent students from accessing the command prompt of RAC: to prevent administrators from accessing the console of RAD: to give administrators access to the InternetE: to prevent students from accessing the InternetF: to prevent students from accessing the Admin networkAnswers: BExplanation:The above config entered on RA by administrator is to allow only Admin people (10.1.1.0) to access RA command prompt using telnet . Since there is an implicit deny any statement at the end of access-list 2, so rest all (students) are prevented from accessing command prompt of RA using telnet. Question 4:What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5?A: It creates a global address pool for all outside NAT transactions.B: It establishes a dynamic address pool for an inside static address.C: It creates dynamic source translations for all inside local PAT transactions. D: It creates a one-to-one mapping between an inside local address and an inside global address. E: It maps one inside source address to a range of outside global addresses.Answers: DExplanation:This command creates a static NAT translation entry for inside localaddress(10.1.1.5) to inside global address(172.35.16.5) .Question 5:What is the effect of the following access list condition?access-list 101 permit ip 10.25.30.0 0.0.0.255 anyA: permit all packets matching the first three octets of the source address to all destinationsB: permit all packets matching the last octet of the destination address and accept all source addressesC: permit all packets from the third subnet of the network address to all destinationsD: permit all packets matching the host bits in the source address to all destinationsE: permit all packets to destinations matching the first three octets in the destination addressAnswers: AExplanation:The wild card mask (0.0.0.255) " 0's in wildcard mask needs a definite match" .So for the above access-list wildcard mask specifies that it need to match first three octets of source address.Destination address for the ACL is any so it permits all packets that matches the first three octets of source address to all destinationsQuestion 6:What does the "Inside Global" address represent in the configuration of NAT? A: the summarized address for all of the internal subnetted addressesB: the MAC address of the router used by inside hosts to connect to the InternetC: a globally unique, private IP address assigned to a host on the inside networkD: a registered address that represents an inside host to an outside network Answers: DExplanation:Inside global address— A legitimate IP address assigned by the NIC or service provider that represents one or more inside local IP addresses to the outside world.Question 7:What three pieces of information can be used in an extended access list to filter traffic? (Choose three.)A:protocolB:VLAN numberC:TCP or UDP port numbersD:source switch port numberE:source IP address and destination IP addressF:source MAC address and destination MAC addressAnswers: A, C, EQuestion 8:An access list was written with the four statements shown in the graphic. Which single access list statement will combine all four of these statements into a single statement that will have exactly the same effect?A: access-list 10 permit 172.29.16.0 0.0.0.255B: access-list 10 permit 172.29.16.0 0.0.1.255C: access-list 10 permit 172.29.16.0 0.0.3.255D: access-list 10 permit 172.29.16.0 0.0.15.255E: access-list 10 permit 172.29.0.0 0.0.255.255Answers: CExplanation:To combine all four ACL statements into one ACL statement with same effect we need new network that matches all 4 statements network statement and new wildcard mask for the new network we will use.New Network for the ACL statement: AND operation needs to be perform onall four statements.AND operation: (AND: The output is true only when both inputs A and Bare true.)A -B = Output0 -0 = 0; 0-1 = 0 ; 1-0 = 0; 1-1= 1Following above AND operations procedure172.29.16.0 = 10101100.00011101.00010000.00000000172.29.17.0 = 10101100.00011101.00010001.00000000172.29.18.0 = 10101100.00011101.00010010.00000000172.29.19.0 = 10101100.00011101.00010011.00000000 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::172.29.16.0 = 10101100.00011101.00010000.00000000 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::new network after AND operation is 172.29.16.0Now to find out Wildcard mask to match all four networks we need to perform XOR operations.XOR operation:(XOR: The output is true when either inputs A or B are true, but not if both A and B are true.)A -B = Output0 - 0 = 0 ; 0 - 1 = 1 ; 1-0 = 1; 1 - 1 = 0Following above XOR operations procedure172.29.16.x = 10101100.00011101.00010000.x172.29.17.x = 10101100.00011101.00010001.x172.29.18.x = 10101100.00011101.00010010.x172.29.19.x = 10101100.00011101.00010011.x ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::0.0.3.x = 00000000.00000000.00000011.x ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::Since we are only concern about first three octets the last octet can be 255 so the new wildcard mask is 0.0.3.255The complete single acl statement with new network and wildcard mask that matches all four networks isaccess-list 10 permit 172.29.16.0 0.0.3.255Question 9:An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL? (Choose three.)A:FTPB:TelnetC:SMTPD:DNSE:HTTPF:POP3Answers: D, E, FExplanation:Ports 21, 23 and 25 are denied by ACL.21 = FTP ; 23= Telnet ; 25= SMTPRemaining ports are permited so DNS, HTTP and POP3 ports are permitted by ACL.Quesstion 10:Refer to the exhibit. The FMJ manufacturing company is concerned about unauthorized access to the Payroll Server. The Accounting1, CEO, Mgr1, and Mgr2 workstations should be the only computers with access to the Payroll Server. What two technologies should be implemented to help prevent unauthorized access to the server? (Choose two.)A:access listsB:encrypted router passwordsC:STPD:VLANsE:VTPF:wireless LANsAnswers: A, DExplanation:Access-lists are created to permit only Accounting1, CEO, Mgr1, and Mgr2 workstations to Payroll server.VLAN can be created which creates a separate Broadcast domain with vlan members only Accounting1, CEO, Mgr1, and Mgr2 workstations including Payroll server.Question 11:A network administrator would like to implement NAT in the network shown in the graphic to allow inside hosts to use a private addressing scheme. Where should NAT be configured?A: Corporate routerB: Engineering routerC: Sales routerD: all routersE: all routers and switchesAnswers: AQuestion 12:An access list has been designed to prevent HTTP traffic from the Accounting Department from reaching the HR server attached to the Holyoke router. Which of the following access lists will accomplish this task when grouped with the e0 interface on the Chicopee router?A: permit ip any anydeny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80B: permit ip any anydeny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80C: deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80permit ip any anyD: deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80permit ip any anyAnswers: DExplanation:.We need to create a ACL which denies Account department network from accessing HTTP on HR server.。

思科基础实验(中英文对照)CCNA-CCNP实验

目录实验一路由器基本配置............................................ 错误!未指定书签。

实验二静态路由......................................................... 错误!未指定书签。

实验三缺省路由......................................................... 错误!未指定书签。

实验四静态路由&缺省路由&CDP协议............... 错误!未指定书签。

实验五三层交换机实现VLAN间通信................. 错误!未指定书签。

实验六Vtp ................................................................... 错误!未指定书签。

实验七生成树STP ..................................................... 错误!未指定书签。

实验八RIP路由协议1 ............................................. 错误!未指定书签。

实验九RIP路由协议2 ............................................. 错误!未指定书签。

实验十OSPF单区域1 .............................................. 错误!未指定书签。

实验十一OSPF单区域2 ......................................... 错误!未指定书签。

实验十二OSPF单区域3 ......................................... 错误!未指定书签。

实验十三EIGRP ........................................................ 错误!未指定书签。

CCNA第二学期练习答案chapter1

1Which two statements correctly describe the components of a router? (Choose two.) RAM permanently stores the configuration file used during the boot sequence.ROM contains diagnostics executed on hardware modules.NVRAM stores a backup copy of the IOS used during the boot sequence.Flash memory does not lose its contents during a reboot.ROM contains the most current and most complete version of the IOS.Flash contains boot system commands to identify the location of the IOS.2Which interfaces in the exhibit could be used for a leased line WAN connection? (Choose tw1234563 If a router cannot find a valid configuration file during the startup sequence, what will occur?The startup sequence will reset.The router will prompt the user for a response to enter setup mode.The startup sequence will halt until a valid configuration file is acquired.The router will generate a default configuration file based on the last valid configuration.The router will monitor local traffic to determine routing protocol configuration requiremen4 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 IOS5 What is the default sequence for loading the configuration file?NVRAM, FLASH, ROMFLASH, TFTP,CONSOLENVRAM, TFTP, CONSOLEFLASH, TFTP, ROM6 From what location can a router load the Cisco IOS during the boot process? (Choose two.)RAMTFTP serverNVRAMsetup routineFlash memoryterminal7 Which are functions of a router? (Choose three.)packet switchingextension of network segmentssegmentation of broadcast domainsselection of best path based on logical addressingselection of best path based on physical addressing8 What three processes does a router execute when it receives a packet from one network thadestined for another network? (Choose three.)decapsulates the Layer 3 packet by stripping off the Layer 2 frame headeruses the destination MAC Address in the IP Header to look up the next-hop address in th tableleaves the Layer 2 frame header intact when decapsulating the Layer 3 packetuses the destination IP Address in the IP header to look up the next-hop address in the r tableencapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit iencapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exit i 9 The network administrator needs to connect two routers directly via their FastEthernet ports.cable should the network administrator use?straight-throughrollovercross-overserial10Refer to the exhibit. What can be concluded from the output of the running-configuration of a The passwords are encrypted.The current configuration was saved to NVRAM.The configuration that is shown will be the one used on the next reboot.The commands that are displayed determine the current operation of the router.11 Which two statements describe characteristics of load balancing? (Choose two.)Load balancing occurs when a router sends the same packet to different destination netwLoad balancing occurs when the same number of packets are sent over static and dynamLoad balancing allows a router to forward packets over multiple paths to the same destin network.Unequal cost load balancing is supported by EIGRP.If multiple paths with different metrics to a destinations exist, the router cannot support lo balancing.12Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (ChoThis router only has two interfaces.The router interfaces are not operational yet.This router is configured to forward packets to remote networks.The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP and the no shutdown command.An IP packet received by this router with a destination address of 198.18.9.1 will be forw of the Serial0/0/0 interface.13The serial connection shown in the graphic needs to be configured. Which configuration com must be made on the Sydney router to establish connectivity with the Melbourne site? (ChooSydney(config-if)# ip address 201.100.53.2 255.255.255.0Sydney(config-if)# no shutdownSydney(config-if)# ip address 201.100.53.1 255.255.255.224Sydney(config-if)# clock rate 56000Sydney(config-if)# ip host Melbourne 201.100.53.214 Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modesinterfaces that can be protected with passwords. (Choose three.)VTY interfaceconsole interfaceEthernet interfacesecret EXEC modeprivileged EXEC moderouter configuration mode15 What is the outcome of entering these commands?R1(config)# line vty 0 4R1(config-line)# password check123R1(config-line)# loginensures that a password is entered before entering user EXEC modesets the password to be used for connecting to this router via Telnetrequires check123 to be entered before the configuration can be savedcreates a local user account for logging in to a router or switch16Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the c networks or pings between router interfaces are not working. What is the most likely problem The destination networks do not exist.The IP addresses on the router interfaces must be configured as network addresses and addresses.The interfaces must be enabled with the no shutdown command.Each interface must be configured with the clock rate command.17 A network administrator has just entered new configurations into Router1. Which command sexecuted to save configuration changes to NVRAM?Router1# copy running-config flashRouter1(config)# copy running-config flashRouter1# copy running-config startup-configRouter1(config)# copy running-config startup-configRouter1# copy startup-config running-configRouter1(config)# copy startup-config running-config18Refer to the exhibit. All routers have a route in its routing table to each network that is shown exhibit. Default routes have not been issued on these routers. What can be concluded about packets are forwarded in this network? (Choose two.)If RouterC receives a packet that is destined for 10.5.1.1, it will be forwarded out interfacIf RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out in S0/0/1.If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interf S0/0/1.If RouterB receives a packet that is destined for 172.20.255.1, it will be forwarded out int S0/0/0.If RouterC receives a packet that is destined for 192.16.5.101, it will be forwarded out int S0/0/1.19 What header address information does a router change in the information it receives from anEthernet interface before information is transmitted out another interface?only the Layer 2 source addressonly the Layer 2 destination addressonly the Layer 3 source addressonly the Layer 3 destination addressthe Layer 2 source and destination addressthe Layer 3 source and destination address20Refer to the exhibit. Host A pings host B. When R4 accepts the ping the Ethernet interface, what two pieces of header information are included? (Choose two.)s ource IP address: 192.168.10.129s ource IP address: BBBB.3333.5677s ource MAC address: 5555.AAAA.6666d estination IP address: 192.168.10.33d estination IP address: 192.168.10.134d estination MAC address: 9999.DADC.123421Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?The subnet mask of host 2 is incorrect.Host 1 and host 2 are on different networks.The switch needs an IP address that is not configured.The router LAN interface and host 1 are on different networks.The IP address of host 1 is on a different network than is the LAN interface of the router.。

CCNA认证试题(中文+答案)

CCNA认证试题一（附答案和解析）中文版(一)1、目前，我国应用最为广泛的LAN标准是基于（）的以太网标准.(A) IEEE 802.1(B) IEEE 802.2(C) IEEE 802.3(D) IEEE 802.5答案：C参考知识点：现有标准：IEEE 802.1 局域网协议高层IEEE 802.2 逻辑链路控制IEEE 802.3 以太网IEEE 802.4 令牌总线IEEE 802.5 令牌环IEEE 802.8 FDDIIEEE 802.11 无线局域网记住IEEE802.1-------IEEE802.5的定义以太网是一种计算机局域网组网技术。

IEEE制定的IEEE 802.3标准给出了以太网的技术标准。

它规定了包括物理层的连线、电信号和介质访问层协议的内容。

以太网是当前应用最普遍的局域网技术。

它很大程度上取代了其他局域网标准，如令牌环、FDDI和ARCNET。

以太网的标准拓扑结构为总线型拓扑，但目前的快速以太网（100BASE-T、1000BASE-T标准）为了最大程度的减少冲突，最大程度的提高网络速度和使用效率，使用交换机（Switch）来进行网络连接和组织，这样，以太网的拓扑结构就成了星型，但在逻辑上，以太网仍然使用总线型拓扑的C***A/CD介质访问控制方法。

电气电子工程师协会或IEEE（Institute of Electrical and Electronics Engineers）是一个国际性的电子技术及信息科学工程师的协会。

建会于1963年1月1日。

总部在美国纽约市。

在150多个国家中它拥有300多个地方分会。

目前会员数是36万。

专业上它有35个专业学会和两个联合会。

IEEE发表多种杂志，学报，书籍和每年组织300多次专业会议。

IEEE定义的标准在工业界有极大的影响。

下面列出：IEEE802．3以太网标准802.3--------- 10Base以太网标准802.3u-------- 100Base-T（快速以太网）802.3z-------- 1000Base-X（光纤吉比特以太网）802.3ab-------- 1000Base-T（双绞线吉比特以太网）2、对于这样一个地址,192.168.19.255/20,下列说法正确的是: （）(A) 这是一个广播地址(B) 这是一个网络地址(C) 这是一个私有地址(D) 地址在192.168.19.0网段上(E) 地址在192.168.16.0网段上(F) 这是一个公有地址答案：CE注：IP地址中关键是看她的主机位，将子网掩码划为二进制，1对应上面的地址是网络位，0对应的地址是主机位192.168.19.255/20划为二进制为：11000000.10101000.00010011.1111111111111111.11111111.11110000.00000000主机位变成全0表示这个IP的网络地址主机槐涑扇?表示这个IP的广播地址RFC1918文件规定了保留作为局域网使用的私有地址：10.0.0.0 - 10.255.255.255(10/8 prefix)172.16.0.0 - 172.31.255.255 (1 72.16/12 prefix)192.168.0.0 - 192.168.255.255 (192.168/16 prefix)3、Quidway系列路由器在执行数据包转发时，下列哪些项没有发生变化（假定没有使用地址转换技术）？（）(A) 源端口号(B) 目的端口号(C) 源网络地址(D) 目的网络地址(E) 源MAC地址(F) 目的MAC地址答案：ABCD参考知识点：路由功能就是指选择一条从源网络到目的网络的路径，并进行数据包的转发。

CCNA考试题库中英文翻译版及答案

CCNA考试题库中英文翻译版及答案1[1]1. What are two reasons that a network administrator would use access lists? (Choose two.)1.出于哪两种理由，网络管理员会使用访问列表?A. to control vty access into a routerA.控制通过VTY访问路由器B. to control broadcast traffic through a routerB.控制广播流量穿越路由器2.一个默认的帧中继WAN被分类为哪种物理网络类型?A. point-to-pointA.点到点B. broadcast multi-accessB.广播多路访问C. nonbroadcast multi-accessC.非广播多路访问D. nonbroadcast multipointD.非广播多点E. broadcast point-to-multipointE.广播点到多点Answer: C3. A single 802.11g access point has been configured and installed in the center of a squarA few wireless users are experiencing slow performance and drops while most users are oat peak efficiency. What are three likely causes of this problem? (Choose three.)3.一个802.11接入点被部署在一个方形办公室的中央，当大多数用户在大流量传输数一些无线用户发现无线网络变得缓慢和出现丢包A. mismatched TKIP encryptionB. null SSIDC. cordless phonesD. mismatched SSIDE. metal file cabinetsF. antenna type or directionAnswer: CEF4. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?根据下图，图中的拓扑中存在多少个广播域?A. one A.1B. two B.2C. three C.3D. four D.4E. five E.5F. six F.6Answer: C5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)5.根据下图，WLAN diagram决定了哪两个事实A. The area of overlap of the two cells represents a basic service set (BSS).A. 两个 cells的overlap的区域描述了一个basic service setB. The network diagram represents an extended service set (ESS).B. 网络描述了一个extended service setC. Access points in each cell must be configured to use channel 1.C. 再每个CELL中的AP必须被配置成使用channel 1D. The area of overlap must be less than 10% of the area to ensure connectivity.D. 为了确保连通性,重叠区域必须小于10%E. The two APs should be configured to operate on different channels.E. 两个访问点应该被配置成工作在不同的频道Answer: BE6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router.Which of the following statements is true concerning this command?6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast，以下选项正确的是?A. This command should be executed from the global configuration mode.A.该命令应该在全局配置模式下被执行B. The IP address 10.121.16.8 is the local router port used to forward data.B.IP地址10.121.16.8是本地路由器用来转发数据的接口C. 102 is the remote DLCI that will receive the information.C.102是远端的DLCI它将接受信息。

CCNA实验教程

福建最好的培训中心福建最大的CISCO实验室3名CCIE,100多套CISCO设备PIX防火墙，3550交换机，7000路由器，两条ISDN线路基带MODEM，电话交换机，NETSCREEN防火墙登录微思实验室：远程: telnet://本地: telnet:192.168.10.251• Lab 1 - Basic Router Configuration• Lab 2 - Advanced Router Configuration• Lab 3 - CDP• Lab 4 - Telnet• Lab 5 - TFTP• Lab 6 - RIP• Lab 7 - IGRP• Lab 8 - EIGRP• Lab 9 - OSPF• Lab 10 – Catalyst 1900 Switch Configuration• Lab 11 - VLANs & Trunking (Catalyst 1900)• Lab 12 - Catalyst 2950 Switch Configuration• Lab 13 - VLANs and Trunking (Catalyst 2950)• Lab 13-1 Routing inter VLAN(Dot1q)• Lab 14 - IP Access Lists• Lab 15 - NAT/PAT• Lab 16 - PPP & CHAP• Lab 17 - ISDN BRI-BRI using Legacy DDR• Lab 18 - ISDN BRI-BRI using Dialer Profiles• Lab 19 - ISDN PRI using Dialer Profiles• Lab 20 - Frame RelayLAB 1 –基本配置3. 用户模式Router>4. Router> enable //用户模式敲入enable进入到特权模式Router#5. Router# ? //敲入问号看帮助6. Router# disable //特权模式敲入disable退到用户模式Router>7. Router> enable //用户模式敲入enable进入到特权模式Router# configure terminal //特权模式敲入configure terminal进入配置模式Router(config)# //配置模式8. 配置路由器名字(主机名)如…R1‟ (注：如果你用的实验台号是03，则命名为na03r1,如果为12，则命名na12r1,依次类推).Router(config)# hostname na12r1 //把第12号实验台的第一台路由器命名为na12r1na12r1(config)#9. 配置路由器的密码:●配置console 口密码:R1(config)#line console 0R1(config-line)#loginR1(config-line)#password ciscoR1(config-line)#设置密码后:00:29:42: %SYS-5-CONFIG_I: Configured from console by consoleUser Access VerificationPassword:Password: //这里要输入console口密码●配置enable 密码//从用户模式到enable模式的密码问题A: when both encrypted and unencrypted enable passwords are configured, which one is used?R1(config)# enable password cisco//密码显示为明文R1(config)# enable secret wisdom//密码为加密过的,显示为乱码注:用命令show running-config 可以看到密码cisco为明文,密码wisdom显示为乱码,当两个密码都配置时,只有enable secret所跟的密码生效,两个密码不可以配置一样的密码.配置vty密码//远程登陆telnet 的密码R1(config)#line vty 0 4R1(config-line)#loginR1(config-line)#password ciscoR1(config-line)#telnet命令的使用: telnet +IP address or hostname of a remote system例如: telnet 192.168.10.25110. 配置路由器接口ethernet0的IP address:R1>enableR1#configure terminalR1(config)#interface ethernet 0R1(config-if)#ip address 11.1.1.1 255.255.255.0R1(config-if)#no shutdown11. 在Serial0口配置R1(config-if)# int serial 0R1(config-if)# ip address 12.1.1.1 255.255.255.0R1(config-if)# no shutdown12. 测试ctrl-z的作用R1(config-if)# ctrl-z 任何模式下敲入ctrl-z都会退回到特权模式R1# 特权模式13. 退出路由器R1# logout 完全退出路由器14. 回到特权模式R1> enablepassword: cisco 输入enable secret 的密码为ciscoR1#15.显示接口的基本概况:R1# show ip interface brief16. 显示详细信息:show interface +接口类型+接口偏号例如:R1# show interfaces ethernet0 或是show interface serial 0R1#show interfaces ethernet 0Ethernet0 is up, line protocol is downHardware is Lance, address is 0000.0c92.8164 (bia 0000.0c92.8164)Internet address is 11.1.1.1/24MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 145/255, load 1/255 ……………….…………17.显示内存信息(也就是路由器正在运行的配置):R1# show running-config //当前正在远行的配置18. 显示NVRAM? If not, why not?R1# show startup-config 显示已经保存过的配置19. 保存配置:R1# copy running-config startup-config或是R1#write保存配置:copy running-config startup-config等同于write20. 现在显示NVRAM.R1# show startup-config21. 使用Show version:问题A: What IOS release is running在R1? 查看IOS的版本问题B: What are the contents of the configuration register? 查看寄存器的值R1# show version22. 查看运行的协议问题A:which protocols are currently running on the router?R1# show ip protocols23. 进入另一台Router.Router> enableRouter# configure terminalRouter(config)#24. 配置主机名，配置密码.Router(config)# hostname R2R2(config)# enable secret cisco25. 配置以太网IP.R2(config)# interface e0R2(config-if)# ip address 220.1.1.2 255.255.255.0R2(config-if)# no shutdown26. 显示所有接口简单信息R2(config-if)# ctrl-zR2# show ip interface briefR1#show ip interface briefInterface IP-Address OK? Method Status ProtocolEthernet0 11.1.1.1 YES manual up down Serial0 unassigned YES unset administratively down down Serial1 unassigned YES unset administratively down down3. 配置登陆信息Banner”Welcome to WISDOM LAB - Authorized Users Only”.R1(config)# banner motd #Welcome to WISDOM LAB - Authorized Users Only #4. 退出路由器,重新登录.R1# logoutenterpassword: ciscoR1> enablepassword: cisco6. 在R1上将R2和12.1.1.2对应起来（相当于Windows里的Hosts文件的作用）。

CCNA 4 - Final Exam (B)

CCNA 4 - Final Exam (B)Posted by beotron at 9:23 PM1. Identify the factors that contribute to congestion on an Ethernet LAN. (Choose three.)• improper placement of enterprise level servers• addition of hosts to a physical segment• replacement of hubs with workgroup switches• increasing use of bandwidth intensive network applications• migration to full-duplex Ethernet within the LAN2. Which of the following are examples of TCP/IP application layer protocols? (Choose three.)• a terminal emulation protocol that supports remote console connections with various network devices • a protocol created by IBM that makes it easier for mainframes to connect t o remote offices• a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet• a protocol that controls the rate at which data is sent to another computer• a protocol that exchanges network management information between a network device and a management console3. Which of the following eliminates switching loops?• hold-down timers• poison reverse• spanning tree protocol• time to live• split horizon protocol4. The show cdp neighbors command is a very useful network troubleshooting tool. Using the output in the graphic, select the statements that are true. (Choose two.)• CDP operates at the network layer of the OSI model.• The output of this command displays information about directly connected Cisco devices only.• The switch is attached to the SanJose1 FastEthernet0/21 interface.• SanJose1 is running CDP version 12.0.• SanJose1 has two fully operational, cdp-enabled Cisco switches directly connected to it.• SanJose2 is a 2600 series router running several routed protocols5. A network administrator can ping the Denver router, but gets a ‘Password Required but None Set’ message when trying to connect remotely via Telnet. Which command sequence must be applied to the Denver router to allow remote access?• Router(c onfig)# line console 0Router(config-line)# loginRouter(config-line)# password cisco• Router(config)# line vty 0 4Router(config-line)# loginRouter(config-line)# password cisco• Router(config)# line virtual terminalRouter(config-line)# enable loginRouter(config-line)# password cisco• Router(config)# line vty 0 4Router(config-line)# enable secretRouter(config-line)# password ciscoRouter(config)# enable secret ciscoRouter(config)# enable cisco6. Which of the following is associated with link-state routing protocols?• low processor overhead• poison reverse• routing loops• split horizon• shortest-path first calculations7. A router does not load its configuration after a power failure. After running the showstartup-configuration command, the adminstrator finds that the original configuration is intact. What is the cause of this problem?• The configuration register is set for 0×2100.• The configuration register is set for 0×2101.• The configuration register is set for 0×2102.• The configurati on register is set for 0×2142.• Boot system commands are not configured.• Flash memory is empty causing the router to bypass the configuration in NVRAM• Nederst på formularen8. Which commands are used to verify the content and placement of access control lists? (Choose three.) • show ip interface• show ip route• show processes• show running-config• show cdp neighbor• show access-lists9. Which of the following are required when creating a standard access control list? (Choose two.)• destination ad dress and wildcard mask• source address and wildcard mask• subnet mask and wildcard mask• access list number between 100 and 199 or 2000 and 2699• access list number between 1 and 99 or 1300 to 199910. Which of the following are keywords that can be used in an access control list to replace a dotted decimal wildcard mask? (Choose two.)• most• host• all• any• some• sum11. Refer to the diagram. All ports on Switch A are in the Sales VLAN and all ports on Switch B are in the Accounting VLAN. How many broadcast domains and how many collision domains are shown? (Choose two).• 3 collision domains• 3 broadcast domains• 5 broadcast domains• 9 collision domains• 10 collision domains• 13 collision domains12. Refer to the graphic. Using the most efficient IP addressing scheme and VLSM, which address can be configured on one of the serial interfaces?• 192.168.16.63/27• 192.168.16.158/27• 192.168.16.192/27• 192.168.16.113/30• 192.168.16.145/30• 192.168.16.193/3013. What is the purpose of the Spanning Tree Protocol (STP)?• prevents Layer 2 loops• prevents routing loops on a router• creates smaller collision domains• creates smaller broadcast domains• allows Cisco devices to exchange routing table updates14. What is the purpose of a loopback address when using the OSPF routing protocol?• activates the OSPF neighboring process• ensures a persistent router ID for the OSPF process• provides a backdoor for connectivity during the convergence process• streamlines and speeds up the convergence pr ocess15. Which statement is true regarding states of the IEEE 802.1d Spanning Tree Protocol?• Ports are manually configured to be in the forwarding state.• Ports listen and learn before going into the forwarding state.• Ports must be blocked before the y can be placed in the disabled state.• It takes 15 seconds for a port to go from blocking to forwarding16. Which sequence of commands is used to configure a loopback address on a router?• Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1Router1(config)# interface serial 0/0• Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1Router1(config)# interface serial 0/0• Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.0• Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.25517. Which routing protocols are classful and do not support VLSM? (Choose two.)• EIGRP• OSPF• RIP v1• RIP v2• IGRP18. Refer to the graphic. Two switches are connected together through a trunk port. SW2 displays the message shown. Which of the following will solve the duplex mismatch?• SW1(config)# interface fastethernet 0/1SW1(config-if)# duplex full• SW1(config)# interface fastethernet 0/1SW1(config-if)# full-duplex• SW2(config)# interface fastethernet 0/1SW2(config-if)# duplex full• SW2(config)# interface fastethernet 0/1SW2(config-if)# full-duplex19. Refer to the graphic. Two routers have been configured to use EIGRP. Packets are not being forwarded between the two routers. What could be the problem?• EIGRP does not support VLSM.• The routers were not configured to monitor neighbor adjacency changes.• The default bandwidth was used on the routers.• An incorrect IP address was configured on a router interface.20. According to the the provided router output, which of the following statements is true regarding PPP operation?• Only the link-establishment phase completed successfully.• Only the network-layer phase completed successfully.• Neither the link-establishment phase nor the the network-layer phase completed successfully.• Both the link-establishment and network-layer phase completed successfully21. Frame Relay is configured over a point-to-point connection between two routers. The output of the show frame-relay pvc command indicates that the status of this PVC is inactive. Which of the following devices could be the source of the problem? (Choose two.)• local router• local Frame Relay switch• remote router• remote Frame Relay switch• R3 has the following configuration:• R3# show running-config• –some output text omitted–• interface serial0/0• bandwidth 128• ip address 192.168.11.2 255.255.255.0• encapsulation frame-relay• frame-relay map ip 192.168.11.2 30 broadcast22. After the command R3# debug frame-relay packet is executed, a ping is issued from R3 to R1 but is unsuccessful. Based on the output of the debug command shown in the graphic and the router configuration, what might be problem?• No clock rate assigned.• There is an incorrect DLCI number in the map statement.• An incorrect IP address exists in the map statement.• The encapsulation command is missing the broadcast keywor d23. Which statements are true regarding the Frame Relay LMI? (Choose three.)• The LMI provides a virtual circuit (VC) status mechanism.• The LMI type must always be manually configured.• The available LMI types are NI1, DMS100 and 5ESS.• The LMI types supported by Cisco routers are CISCO and IETF.• The LMI type configured on the router must match the one used on the Frame Relay switch.• The LMI uses reserved DLCIs to exchange messages between the DTE and DCE24. Which statement describes the process that occurs in Network Address Translation (NAT) overloading?• Multiple private IP addresses are mapped to one public IP address.• The number of usable addresses assigned to a company is divided into smaller manageable groups.• A pool of IP addres ses are mapped to one or more MAC addresses.• The router acts as a DHCP server and assigns multiple public IP addresses for each private IP address configured25. Which two statements are true about the committed information rate on a Frame Relay link? (Choose two.)• The sum of the CIRs for all PVCs must be less than the port speed.• The sum of the CIRs for all PVCs must equal the port speed.• The sum of the CIRs for all PVCs can be greater than the port speed.• The DE bit will be set on frames that ar e transmitted in excess of the CIR.• Frames that are transmitted at greater than the CIR will be discarded at the source.• It is impossible to transmit frames at a rate in excess of the CIR26. Which of the following commands would be used to troubleshoot the processing of call control functions such as call setup, signaling, and termination?• show interface bri0/0• show isdn active• debug isdn q921• debug isdn q931• debug ppp negotiation• debug ppp authentication27. Which of the following statements are true regarding PPP? (Choose three.)• PPP can use synchronous and asynchronous physical media.• PPP can only be used between two Cisco devices.• PPP carries packets from several network layer protocols in LCPs.• PPP uses LCPs to establish, config ure, and test the data link connection.• PPP uses LCPs to agree on format options such as authentication, compression, and error detection28. A network administrator is evaluating authentication protocols for a PPP link. Which of the following reasons might lead to the selection of CHAP over PAP as the authentication protocol? (Choose three.) • establishes identities with a two-way handshake• uses a three-way authentication periodically during the session to reconfirm identities• control by the remote h ost of the frequency and timing of login events• transmits login information in encrypted format• uses an unpredictable variable challenge value to prevent playback attacks• makes authorized network administrator intervention a requirement to establish each session29. Why are static routes often used with ISDN DDR?• They are more stable than dynamic routing protocols.• They are more accurate than dynamic routing protocols because they are put in by a network administrator.• They are easier to modify when a faster technology is installed.• They prevent the unnecessary activation of the link30. Assuming that four bits have been borrowed to make subnets, identify the subnet network addresses. (Choose three.)• 192.168.14.8• 192.168.14.16• 192.168.14.24• 192.168.14.32• 192.168.14.148• 192.168.14.20831. A switch can be configured for three different forwarding modes based on how much of a frame is received before the forwarding process begins. Each of the numbered arrows in the accompanying graphic signifies the point in a frame where a particular forwarding mode will begin. Which one of the following groups reflects the sequence of forwarding modes signified by the numbered arrows?• 1) fast forward• 2) fragment free• 3) store-and-forward• 1) sto re-and-forward2) fragment free3) fast forward• 1) fragment free2) fast forward3) store-and-forward• 1) fast forward2) store-and-forward3) fragment free32. Which of the following commands will display a communication message on a router before the router prompt is shown?• banner motd * Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW. *• message Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW.• banner * Property of TLC. UNAU THORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW. *• hostname (Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW.)• Øverst på formularen33. A router needs to be added to OSPF area 0. Which commands should be used to enable OSPF on the router? (Choose two.)• RouterA(config)# router ospf• RouterA(config)# router ospf 1• RouterA(config-router)# network 192.168.2.0 0.0.0.255 0• RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0• RouterA(config-router)# network 192.168.2.0 255.255.255.0 034. Refer to the graphic. Which of the following commands will configure router A for OSPF?• router ospf 1network 192.168.10.0• router ospf 1network 192.168.10.64 0.0.0.63 area 0network 192.168.10.192 0.0.0.3 area 0• router ospf 1network 192.168.10.64 255.255.255.192network 192.168.10.192 255.255.255.252• router ospf 1network 192.168.10.0 area 035. Which of the following protocols would exchange information between routers to share network addresses and their metrics?• TCP• RIP• CSMA/CD• Ethernet36. Which ISDN device can be directly connected to a two-wire local loop in a North American city?• a router with a serial interface• a router with an S/T interface• a router with a U interface• an ISDN terminal adapter37. The output of the show ip interfaces brief command indicates that Serial0 is up but the line protocol is down. Which of the following are possible causes for the line protocol being in the down state? (Choose two.)• The clock rate is not set on the DTE.• An incorrect default gateway is set on the router.• A network is missing from the routing protocol configuration.• The encapsulation on the Serial0 interface is incorrect.• Keepalives are not being sent by the remote device38. Which of the following is a characteristics of TCP? (Choose two.)• data transport reliability• best path determination• establishing, maintaining, and terminating virtual circuits• encapsulation of packets in a data frame with source and destination MAC addresses• best-effort datagram delivery39. Which statement is true regarding the command ip route 192.168.7.24 255.255.255.248 192.168.7.9? (Choose two.)• A packet destined for host 192.168.7.30 will be forwarded to address 192.168.7.9.• 192.168.7.9 i s the destination network for this route.• 192.168.7.24 is the next-hop router in this command.• This command is issued from the interface configuration mode.• This command is used to define a static route40. Which of the following application layer protocols use TCP? (Choose three.)• SMTP• FTP• SNMP• HTTP• TFTP• DHCP41. Which terms refer to Frame Relay congestion management mechanisms? (Choose three.)• BECN• DLCI• DE• FECN• LMI• Inverse ARP42. Which of the following router commands will verify that a path exists to a destination network?• Router# show ip interfaces brief• Router# show ip route• Router# show cdp neighbors• Router# show running-config• Router# show protocols43. When EIGRP is configured on a router, which table of DUAL information is used to calculate the best route to each destination router?• router table• topology table• DUAL table• CAM table• ARP table44. Refer to the graphic. Routers A and B have EIGRP configured and automatic summarization has been disabled on both routers. Which of the following commands is used on router A to summarize the attached routes, and to which interface is this command applied? (Choose two)• ip summary-address eigrp 1 192.168.10.64 255.255.255.192• ip area-range eigrp 1 192.168.10.80 255.255.255.224• summary-address 192.168.10.80 0.0.0.31• ip summary-address eigrp 1 192.168.10.64 0.0.0.63• serial interface on router A• serial interface on router B45. A router with two LAN interfaces, two WAN interfaces, and two loopback interfaces configured is operating with OSPF as its routing protocol. What is used by the OSPF process to assign the router ID? • the IP address of the interface configured with priority 0• the OSPF area ID configured on the interface with the highest IP addres s• the loopback with the highest IP address configured• the highest IP address on the LAN interfaces• the highest IP address configured on the WAN interfaces46. Given the IP address and subnet mask of 172.16.134.56 255.255.255.224, on which subnetwork does this address reside?• 172.0.0.0• 172.16.134.0• 172.16.134.32• 172.16.134.48• 172.16.134.47• 172.16.134.6347. Which commands show when the last IGRP routing update was received? (Choose two.)• Router# show ip protocols• Router# show version• Router# show interfaces• Router# show ip updates• Router# show ip route48. When using access control lists to filter traffic, which of the following is used to track multiple sessions occurring between hosts?• IP addresses• subnet masks• port numbers• routed protocols• routing protocols• interfaces49. Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address?• This is a useable host address.• This is a broadcast address.• This is a network address.• This is not a valid address50. The company network shown in the drawing has to be subnetted. The company has leased the ClassC IP address of 200.1.2.0. Which of the following network addresses and masks would be appropriate for one of the subnetworks?• 200.1.2.96 255.255.255.192• 200.1.2.160 255.255.255.224• 200.1.2.80 255.255.255.224• 200.1.2.32 255.255.255.240。

CCNP902必考的6个实验(拓扑搭建,配置详解)

GIve it everything you've got.
CCNP902 必考的 6 个实验
目录 CCNP902 必考的 6 个实验............................................................................................................... 1 一、 EIGRP-OSPF 重分发(配置 distance).................................................................................. 2 1.1 拓扑环境....................................................................................................................... 2 1.2 搭建实验环境............................................................................................................... 2 1.3 题目要求....................................................................................................................... 5 1) 不配置 distance，正常配置 .................................................................................... 5 2) 配置 dist

CCNA指令总结

OSPF配置：Router(config)#router ospf process_IDRouter(config-router)#network IP_address wildcard_mask area area_#进程ID用于区分同一路由器上的不同OSPF进程，仅有本地意义，不需要在不同路由器间配置。

如果所有接口都放入区域0，可以用如下命令：Router(config)#router ospf 1Router(config-router)#network 0.0.0.0 255.255.255.255 area 0创建环回接口：Router(config)#interface loopback port_#Router(config-if)#ip address IP_address subnet_mask默认路由传播：Router(config)#ip route 0.0.0.0 0.0.0.0 ISP_interface_or_IP_addressRouter(config)#router ospf process_idRouter(config-router)#default-information originate该命令使边界路由器成为自治系统边界路由器（ASBR）手动更改接口成本：Router(config)#interface ##Router(config-if)#ip ospf cost cost_value成本值从1-65535，成本值需匹配，否则会造成路由器持续运行SPF算法，影响路由器性能。

配置接口带宽：Router(config-if)#bandwidth speed_in_kbit/s该命令必须用于同步串行链路上，使带宽度量值与接口时钟速率匹配。

默认带宽是1544kbit更改最大路径：Router(config-router)#maximum-paths # 最多16条，默认4条。

ccna实验手册

东莞斯瑞教育中心CCNA实验手册V5.0CCNA实验手册实验一基础实验一、拓扑图如下：二、实验目的1、掌握CISCO设备的基础配置。

2、2台设备能够ping 通。

3、熟练使用各种show命令查看设备状态。

三、实验要求：假设公司架设了一条东莞到香港的专线,作为网络管理员的你需要完成设备的基本配置,两台设备要PING通。

四、实验步骤：1、按照拓扑图所示，搭建实验平台2、完成CISCO设备的基础配置➢基本配置包括。

➢设置主机名称和设备标识。

➢关闭设备的DNS查询功能。

➢开启光标跟随功能。

➢设置超时时间,要求HongKong超时时间是10分30秒,DongGuan永远不超时。

➢配置控制台密码,配置VTY密码,配置特权密码,启用密码加密服务。

➢完成基本和辅助配置之后，按照拓扑图配置好设备的IP地址，测试相邻设备之间能否ping通。

➢使用CDP协议查看邻居设备信息,可以对设备进行远程telnet。

➢保存配置文件后，备份IOS软件和配置文件。

3、配置如下：设备命名：Router(config)#hostname dongguanDongguan(config)#关闭DNS查询：Router(config)#no ip domain-lookup注释：IOS软件会把未知的命令当做网络上设备的主机名称，通过广播去查找这台设备，这个过程需要比较久的时间，用这个命令可以避免DNS查询过程，节省时间。

启用光标跟随：Router(config)#line console 0Router(config-line)#logging synchronous注释：IOS软件会对系统状态变化自动的跳出提示信息，这会打乱我们的命令输入会影响我们命令的输入，启动光标跟随可以解决这个问题。

设置超时时间Router(config)#line console 0Router(config-line)#exec-timeout 0（分） 0 （秒）『永不超时』注释：当我们一段时间没有对设备进行操作后，会自动跳出登录，好比windows系统在多长时间没有活动后自动锁定，需要我们重新登录。

Packet Tracer 5——9Cisco EIGRP

Packet Tracer 5.0建构CCNA实验攻略(9)——Cisco EIGRP
EIGRP(Enhanced Interior Gateway Routing Protocol，增强型内部网关路由协议)是Cisco内部专有协议，其它公司的网络产品是不会拥有该协议的。

一、配置实例拓扑图
图一共有四个Cisco 2811路由器，共六个网段
二、配置Cisco EIGRP的基本命令
Router(config)#router eigrp 100开启EIGRP进程，100为AS编号(1——65535)
Router(config-router)#network 10.0.0.0在网络上通告自己所直接连接的网段
三、配置Cisco EIGRP实例
１、基本配置
图二以Router2为例２、启用EIGRP
图三
图四Router1的配置
图五Router2的配置
图六Router3的配置
图七Router4的配置
图八查看路由表
３、校验与排错
把个网段的PC配置好IP地址及网关，用PC4 ping 所有网段都可以ping 通。

图九
图十show ip eigrp neighbors命令查看EIGRP的邻接关系
图十一show ip eigrp interfaces
图十二show ip eigrp topology查看拓扑表
图十三show ip eigrp traffic
图十四debug eigrp packets
EIGRP支持MD5加密认证，但是我们的这个模拟器不支持，这个试验就不做了。

CISCO-CCNA 中文

测试 4 实际的，100% 正确的答案！！！100% 正确的答案！！！100% 正确的答案！！！100% 正确的答案！！！帮助你通过任何的资讯考试！思科 640-802思科 640-802思科 640-802思科 640-802检定 NetworkAssociate 的思科问答集 V3.17问答集 V3.17问答集 V3.17问答集 V3.17英语：大的 5:亿位元组：www.测试 4 亿位元组：www.测试 4 亿位元组：www.测试 4 亿位元组：1.实验室答案：Bomar(Config)#interface fa0/0 BomarConfig-if)#ip nat insideBomar(Config)#interface S0/0Bomar(Config-if)#ip nat outsideBomar(Config-if)#exitBomar(Config)#access-list 1 permit 192.168.16.33 0.0.0.15Bomar(Config)#access-list 1 deny anyBomar(Config)#ip nat pool nat_test 198.18.237.225 198.18.237.230 prefix-length 29 Bomar(Config)#ip nat inside source list 1 pool nat_test overload2.答案：步骤1:查证乙太网络电缆连接步骤2:查证 NIC 操作步骤3:查证 IP 结构步骤4:查证网址3.答案：fromtop：VTY password, console password, access-group, service password encryption, enable secret4.答案：Straight-through is switch to router; crossover is switch to switch; rollover is PC to swith5.答案：没有答案Router>enableRouter#config terminalRouter(config)#hostnameGothaGotha(config)#enable secret mi222keGotha(config)#line console 0Gotha(config-line)#password G8tors1Gotha(config-line)#exitGotha(config)#line vty 0 4Gotha(config-line)#password dun63labGotha(config-line)#loginGotha(config-line)#exitGotha(config)#interface fa0/0Gotha(config-if)#ip address 209.165.201.1 255.255.255.224Gotha(config)#interface s0/0/0Gotha(config-if)#ip address 192.0.2.176 255.255.255.240Gotha(config-if)#no shutdownGotha(config-if)#exitGotha(config)#router ripGotha(config-router)#version 2Gotha(config-router)#network 209.165.201.0Gotha(config-router)#network 192.0.2.176Gotha(config-router)#endGotha#copy run start6.哪些二个位置能被当做一个来源为 IOS 长靴系统的图像配置指令？（选择二。

第4期final-2

此试题参考以下领域的内容：CCNA Exploration: 接入WAN∙7.1.4 配置DHCP 服务器如果将命令ip dhcp excluded-address 10.10.4.1 10.10.4.5添加到配置为DHCP 服务器的本地路由器该路由器将丢弃发往10.10.4.1 和10.10.4.5 的流量。

不会路由地址处于10.10.4.1 到10.10.4.5 之间的客户端所发出的流量。

DHCP 服务器不会分配10.10.4.1 到10.10.4.5 之间的地址。

该路由器将忽略来自地址处于10.10.4.1 到10.10.4.5 之间的DHCP 服务器的流量。

此试题参考以下领域的内容：CCNA Exploration: 接入WAN∙7.1.8 DHCP 故障排除请参见图示。

连接到Fa0/0 的主机无法从此DHCP 服务器获取IP 地址。

debug ip dhcp server命令的输出为："DHCP address pool for 192.168.1.1"。

问题出在哪里？DHCP 地址池中排除了地址192.168.1.1。

192Network 的地址池不正确。

网络地址池的默认路由器不正确。

地址192.168.1.1 已经用在接口Fa0/0 上。

此试题参考以下领域的内容：CCNA Exploration: 接入WAN7.2.2 何谓NAT？请参见图示。

R1 针对内部网络10.1.1.0/24 执行NAT 过载。

主机 A 向web 服务器发送了一个数据的目的IP 地址是什么？10.1.1.2:1234172.30.20.1:1234172.30.20.1:3333192.168.1.2:80此试题参考以下领域的内容：CCNA Exploration: 接入WAN7.3.8 配置用于IPv6 的RIPng请参见图示。

网络管理员对Router1 和Router2 上发出图示中的命令。