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思科CCNA1第八章试题及答案英文版

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CCNA中英对照题库(0-10.pdf

CCNA中英对照题库(0-10.pdf

CCNA中英对照题库(0-10.pdfCCNA （200-120）题库中英对照整理于：2015 年 3 月 31 日版本：1.2 声明：本题库来源互联网（鸿鹄论坛）本题库为英文考试原版左右选择题中文考试为随机抽取英文题的中译版此题库非中文考试题库，而是英文题库手动翻译此题库为手工个人翻译，存在错误和不妥难免，不代表任何官方机构和组织本题库旨在更好的理解英文原本题库，也可以用于中文考试参考用。

如发现任何错误或不当之处，可以自行修改，但请更新版本以免混乱，也可致上传者。

QUESTION 001 Refer to the exhibit. What will Router1 do when it receives the data frame shown? (Choose three.) 参照下图，这个图示显示了Ｒ１接受到如图所示数据帧的时候会怎么做？ A. Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965. Ｒ１会剥离源ＭＡＣ地址，以 0000：0C36.6965 代替。

B. Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1. Ｒ１会剥离源 IP 地址，1/ 10以 192.168.40.1 代替。

C. Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320. Ｒ１会剥离源ＭＡＣ地址，以 0000：0C36.6965 代替。

D. Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1. Ｒ１会剥离目的 IP 地址，以 192.168.40.1 代替。

CCNA认证基础课程-课后作业.习题答案

CCNA认证基础课程-课后作业.习题答案

CCNA认证基础-习题分析讲义第一部分第一章1. Convert the binary number 10111010 into its hexadecimal equivalent. Select thecorrect answer from the list below. （3）1) 852) 903) BA4) A15) B36) 1C2. Convert the Hexadecimal number A2 into its Base 10 equivalent. Select thecorrect answer from the list below. （4）1) 1562) 1583) 1604) 1625) 1646) 1663. Which binary number is a representation of the decimal number 248? （3）1) 111010002) 111101003) 111110004) 111110104. Which of the following will test the internal loopback of a node? （3）1) ping 10.10.10.12) ping 192.168.1.13) ping 127.0.0.14) ping 223.223.223.2235) ping 255.255.255.2555. What can be verified by successfully pinging the reserved loopback address ona host? （2）1) Connectivity exists between two hosts on the LAN.2) The TCP/IP stack of the local host is configured correctly.3) A connection exists between a host and the default gateway.4) The route a packet takes from the local host to a remote host is valid.6. Which of the following commands could be used on a Windows-basedcomputer to view the current IP configuration of the system? (Choose two.) （3，4）1) configip2) ifconfig3) ipconfig4) winipcfg5) Winipconfig7.Refer to the exhibit. What must be configured on Host B to allow it to communicate withthe Host C? (Choose three.) （2，4，6）1)the MAC address of RTA router interface connected to Switch 12) a unique host IP address3)the IP address of Switch 14)the default gateway address5)the MAC address of Host C6)the subnet mask for the LAN8. What are important characteristics to consider when purchasing a networkinterface card? (Choose two.) （2，3）1) security used on the network2) media used on the network3) system bus used on the computer4) software installed on the network5) diagnostic tools installed on the network第二章1. Select the necessary information that is required to compute the estimated timeit would take to transfer data from one location to another. (Choose two.) （1，5）1) file size2) data format3) network in use4) type of medium5) bandwidth of the link2. Using the data transfer calculation T=S/BW, how long would it take a 4MB file tobe sent over a 1.5Mbps connection? （2）1) 52.2 seconds2) 21.3 seconds3) 6.4 seconds4) 2 seconds5) 0.075 seconds6) 0.0375 seconds3. What are features of the TCP/IP Transport layer? (Choose two.) （3，5）1) path determination2) handles representation, encoding and dialog control3) uses TCP and UDP protocols4) packet switching5) reliability, flow control and error correction4. Which of the following is the Layer 4 PDU? （4）1) bit2) frame3) packet4) Segment5. What is important to remember about the data link layer of the OSI model whenconsidering Peer to Peer communication? (Choose three.) （3，4，5）1) It links data to the transport layer.2) It encapsulates frames into packets.3) It provides a service to the network layer.4) It encapsulates the network layer information into a frame.5) Its header contains a physical address which is required to complete the datalink functions.6) It encodes the data link frame into a pattern of 1s and 0s (bits) for transmissionon the medium.6. Which statement describes a star topology? （2）1) Each host in the network is connected to a backbone cable that is terminated atboth ends.2) Each host is connected to a hub or switch, either of which acts as a central pointfor all network connections.3) Each host is directly connected to two other hosts to form a long chain of hosts.4) Each host has a connection to all other hosts in the network.7. Which statements describe the logical token-passing topology? (Choose two.)（2）1) Network usage is on a first come, first serve basis.2) Computers are allowed to transmit data only when they possess a token.3) Data from a host is received by all other hosts. Electronic tokens are passedsequentially to each other.4) Token passing networks have problems with high collision rates.8. Which technologies are considered to be LAN technologies? (Choose two.) （2，5）1) DSL2) Token Ring3) Frame Relay4) ISDN5) Ethernet9.Refer to the exhibit. Host A wants to send a message to host B. Place the following stepsin the correct order so that the message can be sent. （4）A - add network layer addressesB - transmit bitsC - create application dataD - add data link layer addresses1) B, A, D, C2) D, A, C, B3) A, D, A, B4) C, A, D, B5) C, D, A, B6) C, B, A, D10.After an uns u ccessful ping to the local router, the technician decides to investigate therouter. The technician observes that the lights and fan on the router are not operational.In which layer of the OSI model is the problem most likely occurring? （4）1) transport2) network3) data link4) physical11. Refer t o the exhibit. What is the order of the TCP/IP Protocol Data Units as datais moved as indicated through the OSI model? （3）1) data, segments, frames, packets, bits2) data, packets, segments, frames, bits3) data, segments, packets, frames, bits4) data, packets, frames, segments, bits第三章1. Which combinations of charges will be repelled by electric force? (Choose two.)（4，6）1) neutral and neutral2) neutral and positive3) neutral and negative4) positive and positive5) positive and negative6) negative and negative2. Which of the following are considered the best media for use in data networkcommunications? (Choose three.) （2，3，6）1) glass2) fibers3) copper4) gold5) plastic6) silicon7) Silver3. Which of the following wireless standards increased transmission capabilitiesto 11 Mbps? （2）1) 802.11a2) 802.11b3) 802.11c4) 802.11d4. What is attenuation? （3）1) opposition to the flow of current2) measurement of electrical signals relative to time3) degradation of a signal as it travels along the medium4) amount or volume of traffic that is flowing on the medium5. Which cable specifications are indicated by 10BASE-T? （3）1) 10 Mbps transmission speed, baseband signal, 500 meter cable length, coaxialcable2) 10 Mbps transmission speed, broadband signal, 100 meter cable length, coaxialcable3) 10 Mbps transmission speed, baseband signal, 100 meter cable length,twisted-pair cable4) 10 Gbps transmission speed, broadband signal, 500 meter cable length,twisted-pair cable6. For which Ethernet installations would fiber optic rather than Cat5 UTP be abetter media choice? (Choose two.) （2，4）1) a 3 meter connection between two 10BASE-T hubs2) an environment with many potential sources of EMI and RFI3) a peer to peer connection between two NICs with RJ45 connectors4) an installation between two buildings that are located 500 meters apart5) a single building installation where installation costs are the major concern7. Refer to the exhibit. Which type of UTP cable should be used to connect Host Ato Switch1? （4）1) rollover2) console3) crossover4) straight-through8. Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernetconnection between Host A and Host B? （3）1) coax cable2) rollover cable3) crossover cable4) straight-through cable第四章1. During cable testing, which of the following are used to calculate theinformation carrying capacity of a data cable? (Choose two.) （2，5）1) bit speed2) attenuation3) wire map4) saturation limit5) analog bandwidth2. What type of wiring problem is depicted in this sample of a cable tester? （3）1) a fault2) a short3) an open4) a split a good map3. In a new network installation, the network administrator has decided to use amedium that is not affected by electrical noise. Which cable type will best meet this standard? （5）1) coaxial2) screened twisted pair3) shielded twisted pair4) unshielded twisted pair5) fiber optic4. How does network cable length affect attenuation? （3）1) Category 5 cable that is run in metal conduit has the highest attenuation in theshortest distance.2) Shorter cable lengths have greater signal attenuation.3) Longer cable lengths have greater signal attenuation.4) The length of the cable has no effect on signal attenuation.第五章1. The highest capacity Ethernet technologies should be implemented in whichareas of a network? (Choose three.) （3，4，5）1) between workstation and backbone switch2) between individual workstations3) between backbone switches4) between enterprise server and switch5) on aggregate access links2. What device must be used between an AUI port of a networking device and themedia to which it is being connected? （3）1) a transducer2) a transmitter3) a transceiver4) a transponder5) a port replicator3. An ISDN Basic Rate Interface (BRI) is composed of how many signalingchannels? （1）1) 12) 23) 34) 44. Which layer of the OSI model covers physical media? （1）1) Layer 12) Layer 23) Layer 34) Layer 45) Layer 56) Layer 65. What type of network cable is used between a terminal and a console port? （3）1) cross-over2) straight-through3) rollover4) patch cable6. What is the recommended maximum number of workstations configured on apeer-to-peer network? （3）1) 252) 153) 104) 55) 27. Which of the following increases the potential for a collision to occur? （4）1) the use of an active hub instead of an intelligent hub2) the use of an intelligent hub instead of an active hub3) a reduction in the number of devices attached to the hub4) an increase in the number of devices attached to the hub8. What is the maximum length of a media segment used for 100BASE-TX? （1）1) 100 meters2) 185 meters3) 400 meters4) 500 meters9. Which cable diagram displays the end to end pinout for a crossover cable usedwith Cisco devices? （3）1) Cable A2) Cable B3) Cable C4) Cable D第六章1. What does the "10" in 10Base2 indicate about this version of Ethernet? （2）1) The version uses Base10 numbering within the frames.2) The version operates at a transmission rate of 10 Mbps.3) Frames can travel 10 meters unrepeated.4) The maximum frame length is 10 octets.2. How is a MAC address represented? （4）1) four groups of eight binary digits separated by a decimal point2) four Base10 digits separated by a decimal point3) six hexadecimal digits4) twelve hexadecimal digits5) twenty-four Base10 digits3. Which of the following statements are correct about CSMA/CD? (Choose three.)（1，3，6）1) It is a media access method used in LANs.2) It is a media access method used in FDDI WANs.3) When a device needs to transmit, it checks to see if the media is available.4) A device sends data without checking media availability because all deviceshave equal access.5) Multiple devices can successfully transmit simultaneously.6) Only one device can successfully transmit at a time.4. Which devices shown in the graphic must have a MAC address? （5）1) only PC2) only router3) PC and router4) PC, hub, and router5) PC, printer, and router第七章1. Which of the following items are common to all 100BASE technologies?(Choose three.) （1，4，5）1) frame format2) media3) connectors4) timing5) multi-part encoding2. Which of the following does 1000BASE-T use to accomplish gigabit speeds onCat 5e cable? （4）1) the use of four conductors in full-duplex mode2) the use of two multiplexed pairs of wires, simultaneously3) the use of three pairs of wires for data and the fourth for stabilization andforward error correction4) the use of all four pairs of wires in full-duplex mode, simultaneously3. For which of the following is Ethernet considered the standard? (Choose three.)（1，4，5）1) inter-building connection2) mid-length voice3) video conferencing4) vertical wiring5) horizontal wiring6) diagonal wiring4. To make sure timing limitations are not violated when implementing a 10 MbpsEthernet network involving hubs or repeaters, a technician should adhere to which rule? （4）1) the 4-5-3 rule2) the 6-4-2 rule3) the 3-4-5 rule4) the 5-4-3 rule5. What is the maximum distance that 10BASE-T will transmit data before signalattenuation affects the data delivery? （1）1) 100 meters2) 185 meters3) 300 meters4) 500 meters6. When using Category 5 UTP cable, which RJ-45 pin pairs are used to exchangedata between hosts on an Ethernet network? （2）1) 1 and 2; 4 and 52) 1 and 2; 3 and 63) 3 and 6; 7 and 84) 4 and 5; 7 and 8第八章1. John has been hired as the network administrator of a local company and hasdecided to add more hubs to the company's existing network. Which of the following has been caused by John's inexperience? （1）1) collision domain extended2) an increased number of collision domains3) increased network performance4) increased bandwidth5) extended bandwidth2. "CompA" is trying to locate a new computer named "CompB" on the network.Which of the following does "CompA" broadcast to find the MAC address of "CompB"? （2）1) MAC request2) ARP request3) ping4) Telnet5) proxy ARP3. Which of the following is a term associated with replacing hubs with switchesto increase the number of collision domains? （3）1) encapsulation2) latency3) segmentation4) layered model5) broadcast domain6) Extended4. The accumulation of traffic from which of the following can cause a networkcondition called broadcast radiation? (Choose three.) （3，5，6）1) anonymous FTP servers2) telnet sessions3) video over IP applications4) NAS services5) ARP requests6) RIP updates5. Which of the following describes the use of Spanning Tree Protocol (STP)? （4）1) resolve routing loops2) eliminate Split Horizon errors3) limit collisions4) resolve switching loops6. Which term describes the delay in time that occurs when a frame leaves itssource device and reaches its destination? （4）1) collision2) backoff3) attenuation4) latency5) broadcast7. Based on the graphic above, which of the following occurs as each host systemcomes on line in the topology? （2）1) The switch sends its MAC address to each host.2) The switch adds MAC address to the bridge table as each host sends a frame.3) Each host exchanges MAC addresses with each other.4) The switch listens for data traffic to block since the switch lacks an IP address. 8. Which devices segment collision domains? (Choose two.) （2，3）1) transceiver2) router3) switch4) hub5) media9. Which protocol is used to eliminate switching loops? （3）1) Transmission Control Protocol2) Routing Information Protocol3) Spanning Tree Protocol4) Interior Gateway Routing Protocol5) Internetworking Protocol10. Refer to the exhibit. A network associate needs to establish an Ethernetconnection between Host A and Host B. However, the distance between the two hosts is further than the cabling standards allow. Which two devices that operate at the physical layer of the OSI can be used to allow Host A and Host B to communicate? （2，5）1) switch2) hub3) bridge4) router5) repeater第九章1. Which term describes an ARP response by a router on behalf of a requestinghost? （3）1) ARP2) RARP3) Proxy ARP4) Proxy RARP2. Which protocol functions at the internet layer of the TCP/IP protocol suite? （4）1) File Transfer Protocol (FTP)2) Trivial File Transfer Protocol (TFTP)3) Transmission Control Protocol (TCP)4) Internet Protocol (IP)5) User Datagram Protocol (UDP)6) Simple Mail Transport Protocol (SMTP)3. Which of these workstation installation and setup tasks are concerned withnetwork access layer functions? (Choose two.) （2，4）1) configuring the e-mail client2) installing NIC drivers3) configuring IP network settings4) connecting the network cable5) using FTP to download application software updates4. Which part of an IP address identifies a specific device on a network? （4）1) first two octets2) third and fourth octets3) network portion4) host portion5) only the fourth octet5. Which of the following are features of the Internet Protocol (IP)? (Choose two.)（1，3）1) It is the most widely implemented global addressing scheme.2) It allows two hosts to share a single address on a local area network.3) It is a hierarchical addressing scheme allowing addresses to be grouped.4) It is only locally significant, used primarily on local area networks.6. Which of the following are useable Class A IP addresses with a default subnetmask? (Choose three.) （2，3，5）1) 127.0.39.12) 111.9.28.303) 123.1.2.1324) 128.50.38.25) 105.1.34.16) 0.23.92.37. Which application layer protocols use UDP at the transport layer? (Choose two.)（2，4）1) FTP2) SNMP3) Telnet4) DHCP5) SMTP第十章1. Which OSI layer encapsulates data into packets? （3）1) session2) transport3) network4) data link2. Which OSI layer defines the functions of a router? （3）1) physical2) data link3) network4) transport5) session3. Which of the following are Cisco proprietary routing protocols? (Choose two.)（2，6）1) RIPv22) IGRP3) OSPF4) BGP5) RIPv16) EIGRP4. A company with a Class B license needs to have a minimum of 1,000 subnetswith each subnet capable of accommodating 50 hosts. Which mask below is the appropriate one? （4）1) 255.255.0.02) 255.255.240.03) 255.255.255.04) 255.255.255.1925) 255.255.255.2245. A small company has a class C network license and needs to create five usablesubnets, each subnet capable of accommodating at least 20 hosts. Which of the following is the appropriate subnet mask? （3）1) 255.255.255.02) 255.255.255.1923) 255.255.255.2244) 255.255.255.2406. When a network administrator applies the subnet mask 255.255.255.248 to aClass A address, for any given subnet, how many IP addresses are available to be assigned to devices? （6）1) 10222) 5103) 2544) 1265) 306) 67. Host A is assigned the IP address 10.18.97.55 /21. How many more networkdevices can be assigned to this subnetwork if Host A is the only one that has an IP address assigned so far? （4）1) 2542) 5093) 10214) 20455) 40946) 81908.Refe r to the exhibit. The network administrator wants to create a subnet for thepoint-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?1) 255.255.255.1922) 255.255.255.2243) 255.255.255.2404) 255.255.255.2485) 255.255.255.2529. What is the correct number of usable subnetworks and hosts for the IP networkaddress 192.168.35.0 subnetted with a /28 mask?1) 6 networks / 64 hosts2) 14 networks / 32 hosts3) 14 networks / 14 hosts4) 30 networks / 64 hosts10. Which subnet masks would be valid for a subnetted Class B address? (Choosetwo.) （5，6）1) 255.0.0.02) 255.254.0.03) 255.224.0.04) 255.255.0.05) 255.255.252.06) 255.255.255.19211. Refer to the exhibit. How will the Fohi router dynamically learn routes to the192.168.16.16/28, 192.168.16.32/28, and 192.168.16.48/28 subnetworks? （3）1) with a static route2) with a routed protocol3) with a routing protocol4) with a directly connected route12. How many broadcast domains are shown in the diagram? （1）1) three2) four3) five4) six5) seven6) eight13. How many collision domains are shown in the diagram? （5）1) three2) four3) five4) six5) seven6) eight14. A router interface has been assigned an IP address of 172.16.192.166 with amask of 255.255.255.248. To which subnet does the IP address belong?1) 172.16.0.02) 172.16.192.03) 172.16.192.1284) 172.16.192.1605) 172.16.192.1686) 172.16.192.17615. Refer to the exhibit. Host A is sending data to Host B. Once R2 determines thatdata from Host A must be forwarded to R1 to reach Host B, which layer of the OSI model will R2 use to address and build the frames destined for R1?1) physical2) data link3) network4) transport5) session6) presentation16. Which type of address is 192.168.170.112/28?1) host address2) subnetwork address3) broadcast address4) multicast address17. Which type of address is 223.168.17.167/29?1) host address2) multicast address3) broadcast address4) subnetwork address18. Which combination of network id and subnet mask correctly identifies all IPaddresses from 172.16.128.0 through 172.16.159.255?1) 172.16.128.0 255.255.255.2242) 172.16.128.0 255.255.0.03) 172.16.128.0 255.255.192.04) 172.16.128.0 255.255.224.05) 172.16.128.0 255.255.255.19219. Refer to the exhibit. The internetwork in the exhibit has been assigned the IPaddress 172.20.0.0. What would be the appropriate subnet mask to maximize the number of networks available for future growth?1) 255.255.224.02) 255.255.240.03) 255.255.248.04) 255.255.252.05) 255.255.254.06) 255.255.255.0第十一章1. If a network administrator needed to download files from a remote server, whichprotocols could the administrator use to remotely access those files? (Choose two.) （3，5）1) NFS2) ASCII3) TFTP4) IMAP5) FTP6) UDP2. What is established during a connection-oriented file transfer betweencomputers? (Choose two.) （2，5）1) a temporary connection to establish authentication of hosts2) a connection used for ASCII or binary mode data transfer3) a connection used to provide the tunnel through which file headers aretransported4) a command connection which allows the transfer of multiple commands directlyto the remote server system5) a control connection between the client and server3. Which of the following protocols are used for e-mail transfer between clientsand servers? (Choose three.) （3，4，5）1) TFTP2) SNMP3) POP34) SMTP5) IMAP46) postoffice4. Which type of institution does the domain suffix .org represent? （4）1) government2) education3) network4) non-profit5. Which of the following services is used to translate a web address into an IPaddress? （1）1) DNS2) WINS3) DHCP4) Telnet6. Which part of the URL http://www.awsb.ca/teacher gives the name of thedomain? （4）1) www2) http://3) /teacher4) awsb.ca7. Which protocols are TCP/IP application layer protocols? (Choose two.) （2，4）1) UDP2) FTP3) IP4) SMTP5) TCP8. What are three characteristics of the TCP protocol? (Choose three.) （3，4，6）1) has less overhead than UDP2) is used for IP error messages3) forces the retransmission undelivered packets4) creates a virtual session between end-user applications5) carries the IP address of destination host in the TCP header6) is responsible for breaking messages into segments and reassembling9. Two peer hosts are exchanging data using TFTP. During the current session, adatagram fails to arrive at the destination. Which statement is true regarding the retransmission of the datagram? （2）1) Datagram retransmission requires user authentication.2) Datagram retransmission is controlled by the application.3) Datagram retransmission relies on the acknowledgements at transport layer.4) Datagram retransmission occurs when the retransmission timer expires in thesource host.案例学习1. 子网计算练习：Answer2. 子网号及广播地址计算练习Answer3. 子网规划练习：已知：给定一个C类地址201.16.5.0/24。

思科CCNA考证习题答案

思科CCNA考证习题答案

1. what could be possible causes for the "Serial0/0 is down"interface status? 这可能是为“Serial0 / 0的可能原因是向下”接口的状态？TWOA.a layer 1 problem exists.1层存在问题D.an incorrect cable is being used。

2.before installing a new,upgraded version of the ios,what should be checked on the router,and which command should be used to gather this information?在安装一个新的，升级的IOS版本，应该怎样检查路由器上，并命令应该被用来收集这些资料？B.the amount of avaiable flash and ram 缴费的闪存和RAM的数量D.show version 显示版本3.refer to the exhibit. which two statements are true about inter VLAN routing in the topology that is shown in the exhibit?（choose two）指展览。

这两个语句是对国际米兰的是在展会上展出的拓扑路由的VLAN是否属实？D. the FastEthernet 0/0 inerface on router1 must be configured with subinterfaces.关于路由器1的在FastEthernet 0/0 inerface 必须配置子接口F.the FastEthernet 0/0 interface on router1 and switch2 trunk ports must be configured using the same encapsulation type. 对在FastEthernet 0/0 接口上路由器1和交换器2中继端口必须配置使用相同的封装类型。

思科第一学期期末考试最新考题CCNA1

思科第一学期期末考试最新考题CCNA1

1R efer to the exhibit. Which Layer 2 protocol could be used inside nework A and network C?IPTCPUDPEthernet2R efer to the exhibit. Whic contains only intermediary devices?A, B, D, GA, B, E, FC, D, G, IG, H, I, J3R efer t The headers added at each layer are shown. Which layer adds the destination and source process numbers to ensure that data is deliv correct application?physical layerdata link layernetwork layertransport layer4The Layer 4 header contains which type of information to aid in the delivery of data?service port numberhost logical addressdevice physical addressvirtual connection identifier5Which fiber connector supports full-duplex Ethernet?6Which device should be used for routing a packet to a remote network?access switchDHCP serverhubrouter7R efer to the exhibit. Host A sends a frame to hos destination MAC address CC. The MAC address for host C is not in the MAC table of switch SW1. How will SW1 handle the frame?Switch SW1 will drop the frame.Switch SW1 will forward the frame to host C.Switch SW1 will flood the frame out all ports.Switch SW1 will flood the frame out all ports except port Fa0/1.8R efer to the exhibit. A network technician has made changes to R1 since the configuration has last been saved. The modified configuration did not produce the desired changes. The techn store a backup copy of the saved configuration on a TFTP server before reloading. Which action will cause the unmodified data to be s TFTP server?9Which three statements are true about network layer addressing? (Choose three.)It uniquely identifies each host.It assists in forwarding packets across internetworks.It uses a logical 32-bit IPv4 address.It is not a configurable address.It is a physical address.It identifies the host from the first part of the address.1 0What is the result of using the clock rate 56000 command at the serial interface of the router?The interface is configured as a DCE device.The interface timers are cleared.The FastEthernet interface is made to emulate a serial interface by assigning it a timing signal.The IP address for the serial interface is configured.1 1E xamine the graphic with configurations. Host A in the Clerical office failed and was replaced. Although a ping to 127.0.0.1 was successful, the replacement com access the company network. With proxy ARP disabled on the Fa0/0 interface of the New York router, what is the likely cause of the pnetwork card failurenetwork cables unpluggedIP address incorrectly enteredsubnet mask incorrectly entered1 2As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?255.255.0.0255.255.248.0255.255.252.0255.255.254.0255.255.255.0255.255.255.1281 3Which OSI layer uses a connection-oriented protocol to ensure reliable delivery of data?application layerpresentation layersession layertransport layer1 4A network has grown too large for technicians to configure network addresses and hosts files for name resolution. Which two apservices should be added to the server to allow these needs to be satisfied dynamically? (Choose two.)DNSFTPDHCPHTTPSMTP15R efer Host A wants to access the Internet. Which combination of a Layer 2 address and a Layer 3 address will enable this access from host ADestination MAC: 0030.8596.DE83 Default gateway: 209.165.202.130Destination MAC: 0030.8596.DE82 Default gateway: 172.16.9.2Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1Destination MAC: 0030.8517.44C4 Default gateway: 209.165.202.1301 6A network administrator is asked to design a new addressing scheme for a corporate network. There are 60 users in the main offthe branch office, 28 users in manufacturing, 12 in the sales office, and 4 users in the research office. Which VLSM addressing scheme 192.168.88.0/24 network will fulfill the requirements while wasting the fewest addresses?192.168.88.0/26 main 192.168.88.32/26 branch 192.168.88.64/26 manufacturing 192.168.88.96/27 sales 192.168.88.128/28192.168.88.0/26 main 192.168.88.64/26 branch 192.168.88.128/27 manufacturing 192.168.88.160/28 sales 192.168.88.176/192.168.88.0/27 main 192.168.88.32/27 branch 192.168.88.64/28 manufacturing 192.168.88.80/29 sales 192.168.88.88/30 r192.168.88.0/27 main 192.168.88.64/28 branch 192.168.88.80/28 manufacturing 192.168.88.96/29 sales 192.168.88.104/301 7Which physical connector type is used for a serial V.35 connection to the CSU/DSU?1 8R efer to the exhibit. Which two facts can be determined a topology? (Choose two.)Four collision domains are present.One logical network is represented.Two broadcast domains are present.Three networks are needed.Three logical address ranges are required.1 9What are three characteristics of CSMA/CD? (Choose three.)It monitors the media for presence of a data signal.After detecting a collision, hosts can resume transmission after a random timer has expired.A jam signal is used to ensure that all hosts are aware that a collision has occurred.Devices can be configured with a higher transmission priority.Data is transmitted only when the data signal is present.It uses a token system to avoid collisions.2R efer to the exhibit. The serial interface of the router was configured with the u commands that are shown. The router cannot ping the router that is directly connected to interface serial 0/0/0. What should the net technician do to solve this problem?Configure the description at interface serial 0/0/0.Configure an IP address on interface serial 0/0/0.Remove the no shutdown command at interface serial 0/0/0Reboot the router.2 1Which OSI layer uses the header information to reassemble the data segments into streams?application layernetwork layerpresentation layersession layertransport layer22R efer The NAT functionality of the router is enabled to provide Internet access to the PC. However, the PC is still unable to access the Intern address should be changed to 209.165.201.1 to enable the PC to access the Internet?192.168.1.191192.168.1.101192.168.1.1192.168.1.25423the exhibit. A technician uses the nslookup command on the PC and views the output that is displayed in the exhibit. What is the IP ad primary domain name server used by the host?10.10.10.32192.168.1.5192.168.1.99192.168.2.1002 4Which memory contents will change as a result of using the Router# erase startup-config command on a router?RAMROMflashNVRAM2 5While configuring a router, a network technician wants to name the router. Which prompt should the technician see when enterhostname command?Router>Router#Router(config)#Router(config-line)#26R efer The PC, the routing table of which is displayed, is configured correctly. To which network device or interface does the IP address 192.1 belong?PCswitchrouter interface fa0/0router interface fa0/127R exhibit. A network administrator is troubleshooting a link that is down between Router1 and Router2. To correct the problem, which w to be switched on one of the Ethernet cable ends?pair 1 and pair 2pair 1 and pair 3pair 2 and pair 3pair 2 and pair 428R efer to the exhib connected to a network. Which action will verify that the PC can communicate with its default gateway?Use the ping 127.0.0.1 command.Use the ipconfig command.Use the ipconfig/all command.Use the ping 10.0.0.254 command.29R efer to the exhibit. Host B was power change will occur in the MAC table of the switch?The table will remain unaffected.The switch will remove the MAC address at Fa0/19.The switch will retain the MAC address until host B is powered on again.The switch will rebuild the MAC table by assigning the FFFF.FFFF.FFFF address to port Fa0/19.3 0What information is contained in the header of Layer 3 to help data delivery?port numberdevice physical addressdestination host logical addressvirtual connection identifier3 1A network technician is tasked with setting up a network for six users, but the users should be able to use their accounts to log othe six computers. What type of network should be used?workgroupP2P applicationspeer-to-peer networkclient-server network32R efer to the exhibit. A web browser is running on h an IP address 10.10.2.2/24. A dynamic port number of 49152 is assigned to the browser. The browser sends a request for a web page server with an IP address 192.168.1.254/24. Which statement is true?The session is established using TCP, and the socket number for the web server is 192.168.1.254: 80.The session is established using TCP, and the socket number for the web server is 192.168.1.254: 49152.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 80.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 49152.33R efer to the exhibit. An administrator on PC1 wants to view so code from a web page housed on the web server. Which client application will allow this request to be started?34R efer to the exhibit. What is required on host A for a netw to create the initial configuration on Router1?an FTP clienta Telnet clienta terminal emulation programa web browser3 5What are two characteristics of the data link layer? (Choose two.)It segments and reorders the data.It exchanges the frames between nodes.It defines the method by which network devices place data onto the media.It manages the transfer of data between the processes that run on each host.It retrieves signals from the media and restores them to their bit representations.3 6A network administrator wants to restrict access to the router privileged EXEC mode. Which password should the administrator uenableauxconsoleVTY3 7Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)172.16.4.63 /26172.16.4.129 /26172.16.4.191 /26172.16.4.51 /27172.16.4.95 /27172.16.4.221 /2738R efer to the exhibit. Host X is unable communicate with host Y. Which command can be run at host X to determine which intermediary device is responsible for this failuretelnet 192.168.1.1ping 192.168.1.1ftp 192.168.1.1tracert 192.168.1.139R efer to the exhibit. W shows the correct topology given the configuration of Router1?4 0If an administrator wished to return a router to the default state, what additional step must be taken after issuing the commandconfig?Reload the device.Issue the command copy running-config start-up config.Perform a show running-config to verify that the file was removed.Enter the interface commands to allow the device to connect to the network.4 1By using the ipconfig command, a network administrator determines that a workstation has the address 192.168.3.38 with 29 bisubnet mask. To what network does the workstation belong?192.168.3.8192.168.3.16192.168.3.24192.168.3.324 2Which statement is true about router hostnames?A hostname should be unique on each router.A router hostname cannot contain capital letters.A router hostname is configured in privileged executive mode.A router hostname must be created before any other configurations can be added to the device.4 3A user types the enable command. What task can be performed at the privileged EXEC mode?Configure the device.Configure individual interfaces.Configure individual terminal lines.Issue show and debug commands.4 4R efer to the logical topology describes the exhibited network?starringpoint-to-pointmulti-access45R efer to the exh wants to access the Internet from the PC. A part of the running configuration of the router is shown. Which default gateway IP addres configured at the PC to enable this access?10.1.192.110.1.192.210.1.192.54192.31.7.14 6Which statement is true about the ICMP protocol?It is an application layer protocol.It is designed to make IP a reliable protocol.It is often filtered out of networks for security purposes.If a host does not respond to an ICMP echo request, the host is not functioning.47R efer to the exhibit. At which OSI lay interface 0/0/1 experiencing problems?Layer 1Layer 2Layer 3Layer 448R efer to the exhibit. The h disconnected from switch 2 and connected to switch 1. Which combination of IP address, subnet mask, and default gateway should b this host to allow it to function in the network?IP address: 10.10.9.37 Subnet mask: 255.255.255.240 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.29 Subnet mask: 255.255.255.248 Default gateway: 10.10.9.35IP address: 10.10.9.32 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 196.1.105.6IP address: 10.10.9.63 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.3549R efer to the exhibit. The d represents the process of sending email between clients. Select the list below that correctly identifies the component or protocol used numbered stage of the diagram.1.MUA2.MDA3.MTA4.SMTP5.MTA6.POP7.MDA8.MUA1.MUA2.POP3.MDA4.SMTP5.MTA6.MDA7.SMTP8.MUA1.MUA2.POP3.SMTP4.MDA5.MTA6.SMTP7.POP8.MUA1.MDA2.SMTP3.MTA4.SMTP5.MTA6.MUA7.POP8.MDA1.MUA2.SMTP3.MTA4.SMTP5.MTA6.MDA7.POP8.MUA5 0What is the Cisco IOS?system software for Cisco devicesRead Only Memory in Cisco devicesnon-volatile storage for device configurationsan initial operating system that is used for boot functions。

思科第一学期期末考试最新答案CCNA1

思科第一学期期末考试最新答案CCNA1

要将数据包发送到远程网络，应使用哪种设备？访问交换机DHCP 服务器集线器路由器OSI 哪一层使用面向连接的协议来确保数据的可靠传输？应用层表示层会话层传输层请参见图示。

根据显示的IP 配置回答，主机 A 和主机 B 无法在本地网络外通信的原因是什么？对主机 A 分配了网络地址。

对主机 B 分配了组播地址。

主机 A 和主机 B 属于不同的网络。

对网关地址分配了广播地址。

请参见图示。

包含路由器 B 的网络遇到问题。

助理网络工程师已确定此网络的问题出在路由行什么操作可以纠正该网络问题？在接口Serial 0/0/0 上发出clock rate命令在接口Serial 0/0/1 上发出description命令在接口FastEthernet 0/0 上发出ip address命令在接口FastEthernet 0/1 上发出no shutdown命令请参见图示。

对于从主机 A 向Web 服务器发出的网页请求，正确的目的套接字数字是什么00-08-a3-b6-ce-46198.133.219.25:80C 172.18.0.0/24 is directly connected, FastEthernet0/0在Cisco IOS 设备中，启动配置文件存储于何处？闪存NVRAMRAMROM在配置路由器时，网络技术人员想要命名路由器。

输入hostname命令后，技术人员会看到下列示？Router>Router#Router(config)#Router(config-line)#下列哪三个IPv4 地址代表子网的广播？（选择三项）172.16.4.63 /26172.16.4.129 /26172.16.4.191 /26172.16.4.51 /27172.16.4.95 /27172.16.4.221 /27网络管理员想要限制访问路由器的特权执行模式。

管理员应该使用哪一种口令？使能aux控制台VTY请参见图示。

CCNA英文试题_(含答案)

CCNA英文试题_(含答案)

1. Refer to the exhibit. What could bepossible causes for the "Serial0/0 is down"interfacestatus? (Choosetwo.)A. A Layer 1 problem exists.B. The bandwidth is set too low.C. A protocol mismatch exists.D. An incorrect cable is being used.E. There is an incorrect IP address on the Serial 0/0 interface.Answer: AD2. Before installing a new, upgraded version of the IOS, what should be checked on the router, andwhichcommand should be used to gather this information? (Choose two.)A. the amount of available ROMB. the amount of available flash and RAM memoryC. the version of the bootstrap software present on the routerD. show versionE. show processesF. show running-configAnswer: BD3. Refer to the exhibit. Which two statements are true about interVLAN routing in the topologythat is shownin the exhibit? (Choose two.)中国思科华为3COM 网络技术发布A. Host E and host F use the same IP gateway address.B. Router1 and Switch2 should be connected via a crossover cable.C. Router1 will not play a role in communications between host A and hostD.D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces.E. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit.F. The FastEthernet 0/0 interface on Router1 and Switch2 trunk ports must be configured using thesameencapsulation type.Answer: DF4. Refer to the exhibit. Which two statements are true about the loopback address that isconfigured onRouterB? (Choose two.)A. It ensures that data will be forwarded by RouterB.B. It provides stability for the OSPF process on RouterB.中国思科华为3COM 网络技术发布C. It specifies that the router ID for RouterB should be 10.0.0.1.D. It decreases the metric for routes that are advertised from RouterB.E. It indicates that RouterB should be elected the DR for the LAN.Answer: BC5. A network administrator is explaining VTP configuration to a new technician. What should thenetworkadministrator tell the new technician about VTP configuration? (Choose three.)A. A switch in the VTP client mode cannot update its local VLAN database.B. A trunk link must be configured between the switches to forward VTP updates.C. A switch in the VTP server mode can update a switch in the VTP transparent mode.D. A switch in the VTP transparent mode will forward updates that it receives to other switches.E. A switch in the VTP server mode only updates switches in the VTP client mode that have a higherVTPrevision number.F. A switch in the VTP server mode will update switches in the VTP client mode regardless of the configured VTP domain membership.Answer: ABD6. Which two locations can be configured as a source for the IOS image in the boot system command?(Choose two.)A. RAMB. NVRAMC. flash memoryD. HTTP serverE. TFTP serverF. TelnetserverAnswer: CE7. What are two reasons a network administrator would use CDP? (Choose two.)A. to verify the type of cable interconnecting two devicesB. to determine the status of network services on a remote deviceC. to obtain VLAN information from directly connected switchesD. to verify Layer 2 connectivity between two devices when Layer 3 failsE. to obtain the IP address of a connected device in order to telnet to the deviceF. to determine the status of the routing protocols between directly connected routersAnswer: DE中国思科华为3COM 网络技术发布8. Refer to the exhibit. Both switches are using a default configuration. Which two destinationaddresses willhost 4 use to send data to host 1? (Choose two.)A. the IP address of host 1B. the IP address of host 4C. the MAC address of host 1D. the MAC address of host 4E. the MAC address of the Fa0/0 interface of the R1 routerF. the MAC address of the Fa0/1 interface of the R1 routerAnswer: AF9. Refer to the exhibit. The router has been configured with these commands:hostname Gatewayinterface FastEthernet 0/0ip address 198.133.219.14 255.255.255.248no shutdowninterface FastEthernet 0/1ip address 192.168.10.254 255.255.255.0no shutdowninterface Serial 0/0ip address 64.100.0.2 255.255.255.252no shutdownip route 0.0.0.0 0.0.0.0 64.100.0.1What are the two results of this configuration? (Choose two.)中国思科华为3COM 网络技术发布A. The default route should have a next hop address of 64.100.0.3.B. Hosts on the LAN that is connected to FastEthernet 0/1 are using public IP addressing.C. The address of the subnet segment with the WWW server will support seven more servers.D. The addressing scheme allows users on the Internet to access the WWW server.E. Hosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internetwithoutaddress translation.Answer: DE10. A company is installing IP phones. The phones and office computers connect to the same device.Toensure maximum throughput for the phone data, the company needs to make sure that the phonetraffic ison a different network from that of the office computer data traffic. What is the best networkdevice to whichto directly connect the phones and computers, and what technology should be implemented on thisdevice?(Choose two.)A. hubB. routerC. switchD. STPE. subinterfacesF. VLANAnswer: CF11. What are two benefits of using VTP in a switching environment? (Choose two.)中国思科华为3COM 网络技术发布A. It allows switches to read frame tags.B. It allows ports to be assigned to VLANs automatically.C. It maintains VLAN consistency across a switched network.D. It allows frames from multiple VLANs to use a single interface.E. It allows VLAN information to be automatically propagated throughout the switching environment.Answer: CE12. Which two statements are true about the command ip route172.16.3.0 255.255.255.0 192.168.2.4?(Choose two.)A. It establishes a static route to the 172.16.3.0 network.B. It establishes a static route to the 192.168.2.0 network.C. It configures the router to send any traffic for an unknown destination to the 172.16.3.0network.D. It configures the router to send any traffic for an unknown destination out the interface withthe address192.168.2.4.E. It uses the default administrative distance.F. It is a route that would be used last if other routes to the same destination exist.Answer: AE13. What are two advantages of Layer 2 Ethernet switches over hubs? (Choose two.)A. decreasing the number of collision domainsB. filtering frames based on MAC addressesC. allowing simultaneous frame transmissionsD. increasing the size of broadcast domainsE. increasing the maximum length of UTP cabling between devicesAnswer: BC14. Refer to the exhibit. A network associate needs to configure the switches and router in thegraphic sothat the hosts in VLAN3 and VLAN4 can communicate with the enterprise server in VLAN2. Which twoEthernet segments would need to be configured as trunk links? (Choose two.)中国思科华为3COM 网络技术发布A. AB. BC. CD. DE. EF. FAnswer: CF15. Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)A. amount of RAMB. bridge priorityC. IOS versionD. IP addressE. MAC addressF. speed of the linksAnswer: BE16. Refer to the exhibit. Assume that the routing protocol referenced in each choice below isconfigured withits default settings and the given routing protocol is running onall the routers. Which twoconditionalstatements accurately state the path that will be chosen between networks 10.1.0.0 and 10.3.2.0for therouting protocol mentioned? (Choose two.)中国思科华为3COM 网络技术发布A. If OSPF is the routing protocol, the path will be from R1 to R3to R4 to R5.B. If OSPF is the routing protocol, the path will be from R1 to R2to R5.C. If OSPF is the routing protocol, the path will be from R1 to R5.D. If RIPv2 is the routing protocol, the path will be from R1 to R3to R4 to R5.E. If RIPv2 is the routing protocol, the path will be from R1 to R5.Answer: AE17. Refer to the exhibit. A network administrator is adding two new hosts to SwitchA. Which threevaluescould be used for the configuration of these hosts? (Choose three.)A. host A IP address: 192.168.1.79。

ccna1章节及期末试题答案

ccna1章节及期末试题答案

第一章：正确答案：2.4.5解析：由于不需要使用网络设备和专用服务器，对等网络易于创建，复杂性更低，且成本更少。

而且对等网络也没有集中管理。

这种网络安全性更低，不可扩展，而且那些同时充当客户端和服务器的设备可能性能更差正确答案：1解析：正确答案： 3.5解析：选择网络介质的条件包括：所选介质可以成功传送信号的距离、要安装所选介质的环境、必须传输的数据量和速度以及介质和安装的成本。

正确答案：3和4解析：终端设备上的应用程序可以生成数据，更改数据内容并且负责启动封装过程。

正确答案：1和4解析：终端设备会发出通过网络传输的数据。

中间设备会在链路发生故障时通过备用路径传输数据，并且会过滤数据传输以增强安全性。

网络介质提供网络消息的传输通道。

正确答案：4解析：外联网是公司外部的人或企业合作伙伴访问数据的网络区域。

内部网只描述通常仅供内部人员访问的网络区域。

当设备连接到有线网络时，有线LAN 会受BYOD（自带设备）影响。

使用大学无线LAN 的设备多为平板电脑和智能手机。

大学生主要使用无线WAN 来访问他们的手机运营商网络。

.正确答案：2解析：由于通过Internet 可以联系在线供应商，所以家庭用户通过Internet 进行网上购物。

内联网基本上是仅供内部使用的局域网。

外联网是外部合作伙伴访问组织内部特定资源的网络。

家庭用户并不一定使用LAN 来访问Internet。

例如，PC 可以通过调制解调器直接连接到ISP。

正确答案：1解析：内部网这个术语用于表示一个组织的私有局域网和广域网连接。

内部网的设计旨在仅允许该组织的成员、员工或其他获得授权的人员进行访问。

正确答案：2和4解析：电缆和DSL 均能实现高带宽、始终联网，并提供到主机计算机或LAN 的以太网连接。

10正确答案：2和3解析：移动电话连接需要使用移动电话网络。

卫星连接通常用于家庭或企业外部不便使用物理布线的位置。

11正确答案：2解析：当对网络资源的请求超出了可用容量时，网络就会变得拥堵。

CCNA测试题英文版(题目)

CCNA测试题英文版(题目)

CCNA Test：Selection：1. A receiving host computes the checksum on a frame and determines that determinesthat the frame is damaged. The frame is then discarded. At witch OSI layer did this happen?A：session B：network C：physical D：data link E：transport2.Where does routing occur within the DoD TCP/IP reference model?A：application B：internet C：network D：transport3.Which command can be a router to verify the layer 3 path to a host?A：traceroute address B：tracert address C：ssh address D：telnet address 4.Which are valid modes for a switch port used as a VLAN trunk？（Choose Three）A：transparent B：auto C：on D：Desirable E：blocking F：forwarding5.What is on benefit of PVST+?A：PVST+ reduces the CPU cycles for all the switches in the networkB：PVST+ automatically selects the root bridge location, to provide optimizedbandwidth usage.C：PVST+ allow the root switch location to be optimized per vlan.D：PVST+ supports Layers 3 load balancing loops6.If IP routing is enable, which command that you can configure a default-router in aroute?A：ip default-gateway 0.0.0.0B：ip route 172.16.2.1 0.0.0.0 0.0.0.0C：ip default-route 0.0.0.0 0.0.0.0 172.16.2.1D：ip route 0.0.0.0 0.0.0.0 172.16.2.17.Which command is userd to display the collection of OSPF link states?A：show ip ospf lsa databaseB：show ip ospf link-stateC：show ip ospf neighborsD：show ip ospf database8.Which command displays IOS version?A：show protocolB：show processC：show systemD：show version9.Which is the update time and the Multicast update address of RIPv2 Protocol?A：30s，255.255.255.255B：30s：224.0.0.9C：10s：255.255.255.255D：10s：224.0.0.910.Which command enable PVST+ on a switch?A：spanning-tree mode rapid-pvstB：spanning-tree uplinkfastC：spanning-tree backbonefastD：spanning-tree mode mstCompletion：1.Write out administrate distance of the following routing protocol：Connect_____、Static_____、RIP_____、OSPF_____、interior EIGRP_____，External EIGRP_____.2.Which modes of a switch in VTP domain?And what it is ?__________________________.3.Which command used to copy IOS file to TFTP server?____________________________.4.The largest hop of Routing Information Protocol is________________________________.5.Which command can configure the routing function in a Layer 3 Switch?______________.Question:Refer to the exhibit.Each of these four switches has been configured with a hostname, as well as being configured to run RSTP.No other configuration changes have been made. Please Find out the root bridge , root port ,designed port, blocking port of this spanning-tree.Configuration：Refer to the exhibit.What commands must be configured on the 2950 switch and the router to allow communication between host 1 and host 2?Please write out the configuration of the 2950 switch and the router in detail.。

CCNA1全书练习题（所有章节chapter1至11）

CCNA1全书练习题（所有章节chapter1至11）

CCNA1全书练习题（所有章节chapter1至11）CCNA Exploration: 网络基础知识(版本4.0)第2章1. TCP/IP 网络接入层有何作用？A．路径确定和数据包交换B. 数据表示、编码和控制C. 可靠性、流量控制和错误检测D. 详细规定构成物理链路的组件及其接入方法E. 将数据段划分为数据包2．在封装过程中，数据链路层执行什么操作？A. 不添加地址。

B. 添加逻辑地址。

C. 添加物理地址。

D. 添加进程的端口号。

3. 请参见图示。

下列哪组设备仅包含终端设备？A. A、C、DB. B、E、G、HC. C、D、G、H、I、JD. D、E、F、H、I、JE. E、F、H、I、J4. 下列哪些陈述正确指出了中间设备在网络中的作用？（选择三项）A. 确定数据传输路径B. 发起数据通信C. 重新定时和重新传输数据信号D. 发送数据流E. 管理数据流F. 数据流最后的终止点5. 下列哪三项陈述是对局域网(LAN) 最准确的描述？（选择三项）A. LAN 通常位于一个地域内。

B. 此类网络由由一个组织管理。

C. LAN 中的不同网段之间一般通过租用连接的方式连接。

D. 此类网络的安全和访问控制由服务提供商控制。

E. LAN 为同一个组织内的用户提供网络服务和应用程序访问。

F. 此类网络的每个终端通常都连接到电信服务提供商(TSP)。

6. 通过检查网络层报头可以确定什么？A. 本地介质上的目的设备B. 用于到达目的主机的路径C. 将要通过介质传输的比特D. 创建数据的源应用程序或进程7. 哪种设备被视为中间设备？A. 文件服务器B. IP 电话C. 笔记本电脑D. 打印机E. 交换机8. OSI 模型各层从最高层到最低层的正确顺序如何？A. 物理层、网络层、应用层、数据链路层、表示层、会话层、传输层B. 应用层、物理层、会话层、传输层、网络层、数据链路层、表示层C. 应用层、表示层、物理层、会话层、数据链路层、传输层、网络层D. 应用层、表示层、会话层、传输层、网络层、数据链路层、物理层E. 表示层、数据链路层、会话层、传输层、网络层、物理层、应用层9. 请参见图示。

思科第一学期期末考试最新考题CCNA1备课讲稿

思科第一学期期末考试最新考题CCNA1备课讲稿

思科第一学期期末考试最新考题C C N A11Refer to the exhibit. Which Layer 2 protocol could be used inside nework A and network C?IPTCPUDPEthernet2Refer to the exhibit. Which set of devices contains only intermediary devices?A, B, D, GA, B, E, FC, D, G, IG, H, I, J3Refer to the exhibit. The headers added at each layer are shown. Which layer adds the destination and source process num ensure that data is delivered to the correct application?physical layerdata link layernetwork layertransport layer4The Layer 4 header contains which type of information to aid in the delivery of data?service port numberhost logical addressdevice physical addressvirtual connection identifier5Which fiber connector supports full-duplex Ethernet?6Which device should be used for routing a packet to a remote network?access switchDHCP serverhubrouter7Refer to the exhibit. Host A sends a frame to host C with a destination MAC address CC. The MAC address for host C is no table of switch SW1. How will SW1 handle the frame?Switch SW1 will drop the frame.Switch SW1 will forward the frame to host C.Switch SW1 will flood the frame out all ports.Switch SW1 will flood the frame out all ports except port Fa0/1.8Refer to the exhibit. A network technician has made several changes to R1 since the configuration has last been saved. Th configuration did not produce the desired changes. The technician wants to store a backup copy of the saved configuration server before reloading. Which action will cause the unmodified data to be saved on the TFTP server?9Which three statements are true about network layer addressing? (Choose three.)It uniquely identifies each host.It assists in forwarding packets across internetworks.It uses a logical 32-bit IPv4 address.It is not a configurable address.It is a physical address.It identifies the host from the first part of the address.10What is the result of using the clock rate 56000 command at the serial interface of the router?The interface is configured as a DCE device.The interface timers are cleared.The FastEthernet interface is made to emulate a serial interface by assigning it a timing signal.The IP address for the serial interface is configured.11Examine the graphic with current configurations. Host A in the Clerical office failed and was replaced. Although a ping to 12 successful, the replacement computer cannot access the company network. With proxy ARP disabled on the Fa0/0 interfacnetwork card failurenetwork cables unpluggedIP address incorrectly enteredsubnet mask incorrectly entered12As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?255.255.0.0255.255.248.0255.255.252.0255.255.254.0255.255.255.0255.255.255.12813Which OSI layer uses a connection-oriented protocol to ensure reliable delivery of data?application layerpresentation layersession layertransport layer14 A network has grown too large for technicians to configure network addresses and hosts files for name resolution. Which twlayer services should be added to the server to allow these needs to be satisfied dynamically? (Choose two.)DNSFTPDHCPHTTPSMTP15Refer to the exhibit. Host A wants to access the Internet. Which combination of a Layer 2 address and a Layer 3 address w access from host A?Destination MAC: 0030.8596.DE83 Default gateway: 209.165.202.130Destination MAC: 0030.8596.DE82 Default gateway: 172.16.9.2Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1Destination MAC: 0030.8517.44C4 Default gateway: 209.165.202.13016 A network administrator is asked to design a new addressing scheme for a corporate network. There are 60 users in the musers in the branch office, 28 users in manufacturing, 12 in the sales office, and 4 users in the research office. Which VLSM scheme that uses the 192.168.88.0/24 network will fulfill the requirements while wasting the fewest addresses?192.168.88.0/26 main192.168.88.32/26 branch192.168.88.64/26 manufacturing192.168.88.96/27 sales192.168.88.128/28 research192.168.88.0/26 main192.168.88.64/26 branch192.168.88.128/27 manufacturing192.168.88.160/28 sales192.168.88.176/29 research192.168.88.0/27 main192.168.88.32/27 branch192.168.88.64/28 manufacturing192.168.88.80/29 sales192.168.88.88/30 research192.168.88.0/27 main192.168.88.64/28 branch192.168.88.80/28 manufacturing192.168.88.96/29 sales192.168.88.104/30 research17Which physical connector type is used for a serial V.35 connection to the CSU/DSU?18Refer to the exhibit. Which two facts can be determined about the topology? (Choose two.)Four collision domains are present.One logical network is represented.Two broadcast domains are present.Three networks are needed.Three logical address ranges are required.19What are three characteristics of CSMA/CD? (Choose three.)It monitors the media for presence of a data signal.After detecting a collision, hosts can resume transmission after a random timer has expired.A jam signal is used to ensure that all hosts are aware that a collision has occurred.Devices can be configured with a higher transmission priority.Data is transmitted only when the data signal is present.It uses a token system to avoid collisions.20Refer to the exhibit. The serial interface of the router was configured with the use of the commands that are shown. The rou ping the router that is directly connected to interface serial 0/0/0. What should the network technician do to solve this probleConfigure the description at interface serial 0/0/0.Configure an IP address on interface serial 0/0/0.Remove the no shutdown command at interface serial 0/0/0Reboot the router.21Which OSI layer uses the header information to reassemble the data segments into streams?application layernetwork layerpresentation layersession layertransport layer22Refer to the exhibit. The NAT functionality of the router is enabled to provide Internet access to the PC. However, the PC is to access the Internet. Which IP address should be changed to 209.165.201.1 to enable the PC to access the Internet?192.168.1.191192.168.1.101192.168.1.1192.168.1.25423the IP address of the primary domain name server used by the host?10.10.10.32192.168.1.5192.168.1.99192.168.2.10024Which memory contents will change as a result of using the Router# erase startup-config command on a router?RAMROMflashNVRAM25While configuring a router, a network technician wants to name the router. Which prompt should the technician see when e hostname command?Router>Router#Router(config)#Router(config-line)#26Refer to the exhibit. The PC, the routing table of which is displayed, is configured correctly. To which network device or inte the IP address 192.168.1.254 belong?PCswitchrouter interface fa0/0router interface fa0/127Refer to the exhibit. A network administrator is troubleshooting a link that is down between Router1 and Router2. To correc which wire pairs need to be switched on one of the Ethernet cable ends?pair 1 and pair 2pair 1 and pair 3pair 2 and pair 3pair 2 and pair 428Refer to the exhibit. A PC is connected to a network. Which action will verify that the PC can communicate with its default gUse the ping 127.0.0.1 command.Use the ipconfig command.Use the ipconfig/all command.Use the ping 10.0.0.254 command.29Refer to the exhibit. Host B was powered off. What change will occur in the MAC table of the switch?The table will remain unaffected.The switch will remove the MAC address at Fa0/19.The switch will retain the MAC address until host B is powered on again.The switch will rebuild the MAC table by assigning the FFFF.FFFF.FFFF address to port Fa0/19.30What information is contained in the header of Layer 3 to help data delivery?port numberdevice physical addressdestination host logical addressvirtual connection identifier31 A network technician is tasked with setting up a network for six users, but the users should be able to use their accounts toany of the six computers. What type of network should be used?workgroupP2P applicationspeer-to-peer networkclient-server network32Refer to the exhibit. A web browser is running on host PC1 with an IP address 10.10.2.2/24. A dynamic port number of 491 assigned to the browser. The browser sends a request for a web page to the web server with an IP address 192.168.1.254 statement is true?The session is established using TCP, and the socket number for the web server is 192.168.1.254: 80.The session is established using TCP, and the socket number for the web server is 192.168.1.254: 49152.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 80.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 49152.33Refer to the exhibit. An administrator on PC1 wants to view some HTML code from a web page housed on the web server.application will allow this request to be started?34Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on Router1?an FTP clienta Telnet clienta terminal emulation programa web browser35What are two characteristics of the data link layer? (Choose two.)It segments and reorders the data.It exchanges the frames between nodes.It defines the method by which network devices place data onto the media.It manages the transfer of data between the processes that run on each host.It retrieves signals from the media and restores them to their bit representations.36 A network administrator wants to restrict access to the router privileged EXEC mode. Which password should the administrenableauxconsoleVTY37Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)172.16.4.63 /26172.16.4.129 /26172.16.4.191 /26172.16.4.51 /27172.16.4.95 /27172.16.4.221 /2738Refer to the exhibit. Host X is unable to communicate with host Y. Which command can be run at host X to determine which intermediary device is responsible for this failure?telnet 192.168.1.1ping 192.168.1.1ftp 192.168.1.1tracert 192.168.1.139Refer to the exhibit. Which option shows the correct topology given the configuration of Router1?40If an administrator wished to return a router to the default state, what additional step must be taken after issuing the comma start-up config?Reload the device.Issue the command copy running-config start-up config.Perform a show running-config to verify that the file was removed.Enter the interface commands to allow the device to connect to the network.41By using the ipconfig command, a network administrator determines that a workstation has the address 192.168.3.38 with the subnet mask. To what network does the workstation belong?192.168.3.8192.168.3.16192.168.3.24192.168.3.3242Which statement is true about router hostnames?A hostname should be unique on each router.A router hostname cannot contain capital letters.A router hostname is configured in privileged executive mode.A router hostname must be created before any other configurations can be added to the device.43 A user types the enable command. What task can be performed at the privileged EXEC mode?Configure the device.Configure individual interfaces.Configure individual terminal lines.Issue show and debug commands.44Refer to the exhibit. Which logical topology describes the exhibited network?starringpoint-to-pointmulti-access45Refer to the exhibit. A user wants to access the Internet from the PC. A part of the running configuration of the router is sho default gateway IP address should be configured at the PC to enable this access?10.1.192.110.1.192.210.1.192.54192.31.7.146Which statement is true about the ICMP protocol?It is an application layer protocol.It is designed to make IP a reliable protocol.It is often filtered out of networks for security purposes.If a host does not respond to an ICMP echo request, the host is not functioning.47Refer to the exhibit. At which OSI layer is serial interface 0/0/1 experiencing problems?Layer 1Layer 2Layer 3Layer 448Refer to the exhibit. The host was disconnected from switch 2 and connected to switch 1. Which combination of IP address mask, and default gateway should be assigned to this host to allow it to function in the network?IP address: 10.10.9.37 Subnet mask: 255.255.255.240 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.29 Subnet mask: 255.255.255.248 Default gateway: 10.10.9.35IP address: 10.10.9.32 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 196.1.105.6IP address: 10.10.9.63 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.3549Refer to the exhibit. The diagram represents the process of sending email between clients. Select the list below that correc the component or protocol used at each numbered stage of the diagram.1.MUA2.MDA3.MTA4.SMTP5.MTA6.POP7.MDA8.MUA1.MUA2.POP3.MDA4.SMTP5.MTA6.MDA7.SMTP8.MUA1.MUA2.POP3.SMTP4.MDA5.MTA6.SMTP7.POP8.MUA1.MDA2.SMTP3.MTA4.SMTP5.MTA6.MUA7.POP8.MDA1.MUA2.SMTP3.MTA4.SMTP5.MTA6.MDA7.POP8.MUA50What is the Cisco IOS?system software for Cisco devicesRead Only Memory in Cisco devicesnon-volatile storage for device configurationsan initial operating system that is used for boot functions。

思科CCNA考试答案(全)

思科CCNA考试答案(全)

CCNA思科考试答案（全）第 1 章考试1一家拥有10 名员工的小型公司使用单个LAN 在计算机之间共享信息。

哪种类型连接适合此公司？由当地电话服务提供商提供的拨号连接能够使公司方便且安全地连接员工的虚拟专用网络通过当地服务提供商建立的私有专用线路通过当地服务提供商提供的宽带服务（如DSL）答案：4解析：对于这种小型办公室，比较适合通过被称为数字用户线路(DSL) 的常见宽带服务实现Internet 连接，这种服务由当地的电话服务提供商提供。

由于员工人数很少，带宽的问题并不突出。

如果公司较大，在远程站点有分支机构，则专用线路会更加适合。

如果公司员工需要通过Internet 与公司联系，则采用虚拟专用网。

2哪种网络情况需要使用WAN？员工工作站需要获取动态分配的IP 地址。

员工在出差时需要通过VPN 连接到公司电子邮件服务器。

分支机构的员工需要与同一园区网络上的另一座建筑物内的公司总部共享文件。

员工需要访问托管在其建筑物内DMZ 中的公司Web 服务器上的网页。

答案：2解析：当出差的员工需要通过WAN 连接到公司电子邮件服务器时，VPN 将通过WAN 连接在员工笔记本电脑与公司网络之间创建一个安全隧道。

通过DHCP 获取动态IP 地址是LAN 通信的功能。

在企业园区的不同建筑物之间共享文件可通过LAN 基础设施来实现。

DMZ 是企业LAN 基础设施内一个受保护的网络。

3以下哪项描述了WAN 的特征？WAN 和LAN 在同一地理范围内运行，但有串行链路。

WAN 网络归运营商所有。

所有串行链路均被视为WAN 连接。

WAN 可提供到园区主干网的终端用户网络连接。

答案：2解析：WAN 可用于将企业LAN 互连到远程分支机构站点LAN 和远程工作人员站点。

WAN 归运营商所有。

虽然WAN 连接一般通过串行接口实现，但并不是所有串行链路均连接至WAN。

LAN（而非WAN）可在组织中提供终端用户网络连接。

4电路交换WAN 技术的两个常见类型是什么？（请选择两项。

思科第一学期第8章测试答案

思科第一学期第8章测试答案

1 Which type of cable run is most often associated with fiber-optic cable?**backbone cablehorizontal cablepatch cablework area cable2 In most business LANs, which connector is used with twisted-pair networking cable?BNCRJ-11**RJ-45Type F3 When is a straight-through cable used in a network?when connecting a router through the console portwhen connecting one switch to another switch**when connecting a host to a switchwhen connecting a router to another router4 With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?**the magnetic field around the adjacent pairs of wirethe use of braided wire to shield the adjacent wire pairsthe reflection of the electrical wave back from the far end of the cablethe collision caused by two nodes trying to use the media simultaneously5 Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?PresentationTransportData Link**Physical6 An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?light injector**OTDRTDRmultimeter7 XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)coaxCat4 UTP**Cat5 UTP**Cat6 UTPSTP8 What is a possible effect of improperly applying a connector to a network cable? Data will be forwarded to the wrong node.**Data transmitted through that cable may experience signal loss.An improper signaling method will be implemented for data transmitted on that cable.The encoding method for data sent on that cable will change to compensate for the improper connection.9 What are three measures of data transfer? (Choose three.)**goodputfrequencyamplitude**throughputcrosstalk**bandwidth10Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?coax cablerollover cable**crossover cablestraight-through cable11 In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?coax**fiberCat5e UTPCat6 UTPSTP12 Which fiber connector supports full duplex Ethernet?13 Which method of signal transmission uses radio waves to carry signals? electricaloptical**wirelessacoustic14 Which characteristics describe fiber optic cable? (Choose two.)**It is not affected by EMI or RFI.Each pair of cables is wrapped in metallic foil.It combines the technique of cancellation, shielding and twisting to protect data. It has a maximum speed of 100 Mbps.**It is the most expensive type of LAN cabling.15 Which of the following is a characteristic of single-mode fiber-optic cable? generally uses LEDs as the light sourcerelatively larger core with multiple light pathsless expensive than multimode**generally uses lasers as the light source16 What is considered a benefit of wireless as a media choice?**more host mobilitylower security risksreduced susceptibility to interferenceless impact of the surroundings on the effective coverage area17 What characteristic of UTP cable helps reduce the effects of interference?the metal braiding in the shieldingthe reflective cladding around core**the twisting of the wires in the cablethe insulating material in the outer jacket18 What is a primary role of the Physical layer in transmitting data on the network? **create the signals that represent the bits in each frame on to the mediaprovide physical addressing to the devicesdetermine the path packets take through the networkcontrol data access to the media。

思科8章练习答案

思科8章练习答案

下列哪一术语用于边界路由器与防火墙之间的公共网络？“清洁的”LAN内部网DMZ外联网***学生答案无法显示，因为没有提交答案。

一家公司想配置防火墙监控所有通信通道，同时只允许属于已知连接的流量通过。

应部署哪种包过滤代理状态包侦测无状态包侦测***学生答案无法显示，因为没有提交答案。

某个黑客已获取访问敏感网络文件的权限。

通过对此攻击进行分析，发现该黑客通过网络的无线部分获取该无线网络上仅设置有一个安全措施，就是MAC 地址过滤。

该黑客很可能是怎样获取网络访问权限的黑客使用软件工具破解了共享的十六进制密钥。

黑客获取了一个可以访问主机的MAC 地址，然后克隆到他的无线笔记本电脑网卡上。

黑客发起了一个拒绝服务攻击，攻破防火墙之后进入无线LAN。

黑客获取了无线访问MAC 地址数据库的权限，然后将他自己的MAC 地址添加到允许地址列表。

***学生答案无法显示，因为没有提交答案。

使用WPA 保护无线网络有何优点？使用128 位预共享十六进制密钥阻止未经授权的无线访问。

使用不会在主机和访问点之间传输的高级加密密钥可以在旧式无线硬件上使用，因此可以为企业设备提供最大的兼容性。

请求无线访问的网络设备MAC 地址必须处于认可的MAC 地址里。

***学生答案无法显示，因为没有提交答案。

关闭窗口SNMP 使用什么来存储收集到的网络信息？网络管理站网络管理数据库管理信息库数据库信息代理***学生答案无法显示，因为没有提交答案。

SNMP 网络代理使用哪种通信机制向网络管理站提供重要但未经请求的信息？查询广播ICMP ping陷阱轮询***学生答案无法显示，因为没有提交答案。

哪三个协议用于带内管理？（选择三项。

）FTPHTTPSNMPTelnetTFTPDHCP***学生答案无法显示，因为没有提交答案。

syslog 客户端生成并转发到syslog 服务器的日志消息中通常包含哪三个项目？（选择三项。

）消息的日期和时间发送设备的ID消息的长度消息ID校验和字段社区ID***学生答案无法显示，因为没有提交答案。

(完整版)ccna1章节与期末答案

(完整版)ccna1章节与期末答案

第一章：正确答案：2.4.5•解析：由于不需要使用网络设备和专用服务器，对等网络易于创建，复杂性更低，且成本更少。

而且对等网络也没有集中管理。

这种网络安全性更低，不可扩展，而且那些同时充当客户端和服务器的设备可能性能更差正确答案：1解析：正确答案： 3.5解析：选择网络介质的条件包括：所选介质可以成功传送信号的距离、要安装所选介质的环境、必须传输的数据量和速度以及介质和安装的成本。

正确答案：3和4解析：终端设备上的应用程序可以生成数据，更改数据内容并且负责启动封装过程。

正确答案：1和4解析：终端设备会发出通过网络传输的数据。

中间设备会在链路发生故障时通过备用路径传输数据，并且会过滤数据传输以增强安全性。

网络介质提供网络消息的传输通道。

正确答案：4解析：外联网是公司外部的人或企业合作伙伴访问数据的网络区域。

内部网只描述通常仅供内部人员访问的网络区域。

当设备连接到有线网络时，有线LAN 会受BYOD（自带设备）影响。

使用大学无线LAN 的设备多为平板电脑和智能手机。

大学生主要使用无线WAN 来访问他们的手机运营商网络。

.正确答案：2解析：由于通过Internet 可以联系在线供应商，所以家庭用户通过Internet 进行网上购物。

内联网基本上是仅供内部使用的局域网。

外联网是外部合作伙伴访问组织内部特定资源的网络。

家庭用户并不一定使用LAN 来访问Internet。

例如，PC 可以通过调制解调器直接连接到ISP。

正确答案：1解析：内部网这个术语用于表示一个组织的私有局域网和广域网连接。

内部网的设计旨在仅允许该组织的成员、员工或其他获得授权的人员进行访问。

正确答案：2和4解析：电缆和DSL 均能实现高带宽、始终联网，并提供到主机计算机或LAN 的以太网连接。

10正确答案：2和3解析：移动电话连接需要使用移动电话网络。

卫星连接通常用于家庭或企业外部不便使用物理布线的位置。

11正确答案：2解析：当对网络资源的请求超出了可用容量时，网络就会变得拥堵。

CCNA第一学期Finalexam考试英文版答案

CCNA第一学期Finalexam考试英文版答案

CCNA第一学期Finalexam考试英文版答案(R&S.)C 1A medium-sized business is researching available options for connecting to the Internet.Thecompany is looking for a high speed option with dedicated, symmetric access.Whichconnection type should the company choose?DSLdialupsatelliteleased linecable modem2What is the purpose of having a converged network?to provide high speed connectivity to all end devicesto make sure that all types of data packets will be treated equallyto achieve fault tolerance and high availability of data network infrastructure devicesto reduce the cost of deploying and maintaining thecommunication infrastructure3What characteristic of a network enables it to quickly grow to support new users andapplications without impacting the performance of the service being delivered to existing users?reliabilityscalabilityquality of serviceaccessibility4Which connection provides a secure CLI session with encryption to a Cisco switch?a console connectionan AUX connectiona Telnet connectionan SSH connection5A network technician is attempting to configure an interface by entering the followingcommand:SanJose(config)#ip address192.168.2.1255.255.255.0.The command isrejected by the device.What is the reason for this? The command is being entered from the wrong mode of operation.The command syntax is wrong.The subnet mask information is incorrect.The interface is shutdown and must be enabled before the switch will accept the IP address.6After several configuration changes are made to a router, the copy running-configurationstartup-configuration command is issued.Where will the changes be stored?flashROMNVRAMRAMthe configuration registera TFTP server7Refer to the exhibit.From global configuration mode,an administrator is attempting to create a message-of-the-day banner by using thecommand banner motd V Authorized access only!Violators will be prosecuted!V When users log in using Telnet,the banner does not appear correctly.What is the problem? The banner message is too long.The delimiting character appears in the banner message.The symbol“!”signals the end of a banner message.Message-of-the-day banners will only appear when a user logs in through the console port.8What are three characteristics of an SVI?(Choose three.) It is designed as a security protocol to protect switch ports.It is not associated with any physical interface on a switch.It is a special interface that allows connectivity by different types of media.It is required to allow connectivity by any device at any location.It provides a means to remotely manage a switch.It is associated with VLAN1by default.9A technician configures a switch with these commands: SwitchA(config)#interface vlan1SwitchA(config-if)#ip address192.168.1.1255.255.255.0 SwitchA(config-if)#no shutdownWhat is the technician configuring?Telnet accessSVIpassword encryptionphysical switchport access10In computer communication,what is the purpose of message encoding?to convert information to the appropriate form for transmissionto interpret informationto break large messages into smaller framesto negotiate correct timing for successful communication11What protocol is responsible for controlling the size of segments and the rate at whichsegments are exchanged between a web client and a web server?TCPIPHTTPEthernet12What are two benefits of using a layered network model? (Choose two.)It assists in protocol design.It speeds up packet delivery.It prevents designers from creating their own model.It prevents technology in one layer from affecting other layers.It ensures a device at one layer can function at the next higher layer.13What is the process of dividing a data stream into smaller pieces before transmission?segmentationencapsulationencodingflow control14When IPv4addressing is manually configured on a web server,which property of the IPv4configuration identifies the network and host portion for an IPv4address?DNS server addresssubnet maskdefault gatewayDHCP server address15A network administrator is troubleshootingconnectivity issues on a ing a tester,the administrator notices that the signals generated by the server NIC are distorted and not usable.In which layer of the OSI model is the error categorized?presentation layernetwork layerphysical layerdata link layer16A network engineer is measuring the transfer of bits across the company backbone for amission critical database application.The engineer notices that the network throughputappears lower than the bandwidth expected.Which three factors could influence thedifferences in throughput?(Choose three.)the amount of traffic that is currently crossing the networkthe sophistication of the encapsulation method applied to the datathe type of traffic that is crossing the networkthe latency that is created by the number of network devices that the data is crossingthe bandwidth of the WAN connection to the Internetthe reliability of the gigabit Ethernet infrastructure of the backbone17Which type of UTP cable is used to connect a PC to a switch port?consolerollovercrossoverstraight-through18What is a characteristic of the LLC sublayer?It provides the logical addressing required that identifies the device.It provides delimitation of data according to the physical signaling requirements of the medium.It places information in the frame allowing multiple Layer 3protocols to use the same network interface and media.It defines software processes that provide services to the physical layer.19What are the three primary functions provided by Layer 2data encapsulation?(Choosethree.)error correction through a collision detection methodsession control using port numbersdata link layer addressingplacement and removal of frames from the mediadetection of errors through CRC calculationsdelimiting groups of bits into framesconversion of bits into data signals20What will a host on an Ethernet network do if it receives a frame with a destination MACaddress that does not match its own MAC address?It will discard the frame.It will forward the frame to the next host.It will remove the frame from the media.It will strip off the data-link frame to check the destination IP address.21What are two actions performed by a Cisco switch? (Choose two.)building a routing table that is based on the first IP address in the frame headerusing the source MAC addresses of frames to build and maintain a MAC address tableforwarding frames with unknown destination IP addresses to the default gatewayutilizing the MAC address table to forward frames via the destination MAC addressexamining the destination MAC address to add new entries to the MAC address table22What are two examples of the cut-through switching method?(Choose two.)store-and-forward switchingfast-forward switchingCRC switchingfragment-free switchingQOS switching23Refer to the exhibit.If host A sends an IP packet to host B,what will the destination address be in the frame when it leaves host A?DD:DD:DD:DD:DD:DD172.168.10.99CC:CC:CC:CC:CC:CC172.168.10.65BB:BB:BB:BB:BB:BBAA:AA:AA:AA:AA:AA24What are two services provided by the OSI network layer?(Choose two.)performing error detectionrouting packets toward the destinationencapsulating PDUs from the transport layerplacement of frames on the mediacollision detection25What information is added during encapsulation at OSI Layer3?source and destination MACsource and destination application protocolsource and destination port numbersource and destination IP address26What are two functions of NVRAM?(Choose two.)to store the routing tableto retain contents when power is removedto store the startup configuration fileto contain the running configuration fileto store the ARP table27Refer to the exhibit.The network administrator for a small advertising company has chosen to use the192.168.5.96/27 network for internal LAN addressing.As shown in the exhibit,a static IP address is assigned to the company web server.However,the web server cannot access the Internet.The administrator verifies that local workstations with IP addresses that are assigned by a DHCP server can access the Internet,and the web server is able to ping local workstations.Which component is incorrectly configured?subnet maskDNS addresshost IP addressdefault gateway address28Why does a Layer3device perform the ANDing process on a destination IP address andsubnet mask?to identify the broadcast address of the destination networkto identify the host address of the destination hostto identify faulty framesto identify the network address of the destination network29What are the three ranges of IP addresses that are reserved for internal private use?(Choosethree.)10.0.0.0/864.100.0.0/14127.16.0.0/12172.16.0.0/12192.31.7.0/24192.168.0.0/1630Which three addresses are valid public addresses? (Choose three.)198.133.219.17192.168.1.24510.15.250.5128.107.12.117192.15.301.24064.104.78.22731What type of IPv6address is FE80::1?loopbacklink-localmulticastglobal unicast32Refer to the exhibit.On the basis of the output,which two statements about network connectivity are correct? (Choose two.)There is connectivity between this device and the device at192.168.100.1.The connectivity between these two hosts allows for videoconferencing calls.There are4hops between this device and the device at 192.168.100.1.The average transmission time between the two hosts is2 milliseconds.This host does not have a default gateway configured.33Which subnet would include the address192.168.1.96as a usable host address?192.168.1.64/26192.168.1.32/27192.168.1.32/28192.168.1.64/2934How many hosts are addressable on a network that has a mask of255.255.255.248?268141625435Which statement is true about variable-length subnet masking?Each subnet is the same size.The size of each subnet may be different,depending on requirements.Subnets may only be subnetted one additional time.Bits are returned,rather than borrowed,to create additional subnets.36Refer to the exhibit.Consider the IP address of 192.168.10.0/24that has been assigned to a high school building.The largest network in this building has100 devices.If192.168.10.0is the network number for the largest network,what would be the network number for thenext largest network,which has40devices?192.168.10.0192.168.10.128192.168.10.192192.168.10.224192.168.10.24037In what two situations would UDP be the preferred transport protocol over TCP?(Choosetwo.)when applications need to guarantee that a packet arrives intact,in sequence,and unduplicatedwhen a faster delivery mechanism is neededwhen delivery overhead is not an issuewhen applications do not need to guarantee delivery of the datawhen destination port numbers are dynamic38What important information is added to the TCP/IPtransport layer header to ensurecommunication and connectivity with a remote network device?timing and synchronizationdestination and source port numbersdestination and source physical addressesdestination and source logical network addresses39What is the TCP mechanism used in congestion avoidance? three-way handshakesocket pairtwo-way handshakesliding window40Which three statements characterize UDP?(Choose three.)UDP provides basic connectionless transport layer functions.UDP provides connection-oriented,fast transport of data at Layer 3.UDP relies on application layer protocols for error detection.UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.UDP relies on IP for error detection and recovery.UDP provides sophisticated flow control mechanisms.41Which two tasks are functions of the presentation layer? (Choose two.)compressionaddressingencryptionsession controlauthentication42Which two protocols operate at the highest layer of the TCP/IP protocol stack?(Choose two.)DNSEthernetIPPOPTCPUDP43Which two roles can a computer assume in a peer-to-peer network where a file is beingshared between two computers?(Choose two.)clientmasterserverslavetransient44What is the function of the HTTP GET message?to request an HTML page from a web serverto send error information from a web server to a web clientto upload content to a web server from a web clientto retrieve client email from an email server using TCP port11045A wireless host needs to request an IP address.What protocol would be used to process therequest?FTPHTTPDHCPICMPSNMP46When planning for network growth,where in the network should packet captures take place toassess network traffic?on as many different network segments as possibleonly at the edge of the networkbetween hosts and the default gatewayonly on the busiest network segment47When applied to a router,which command would help mitigate brute-force password attacksagainst the router?exec-timeout30service password-encryptionbanner motd$Max failed logins=5$login block-for60attempts5within6048Refer to the exhibit.An administrator is testing connectivity to a remote device with the IP address10.1.1.1.What does the output of this command indicate?Connectivity to the remote device was successful.A router along the path did not have a route to the destination.A ping packet is being blocked by a security device along the path.The connection timed out while waiting for a reply fromthe remote device.。

CCNA中英文试题两套-推荐下载

CCNA中英文试题两套-推荐下载

14 下列哪两项陈述说明了无线网络安全的特征？ （选择两项。）
4
请参见图示。 在 Linksys 集成路由器的 Wireless 菜单选项中，Network Mode 选项 Mixed 是什么意思？
路由器支持加密和身份验证。 路由器支持有线和无线两种连接。 路由器支持 802.11b、802.11g 和 802.11n 设备。 路由器支持通过红外和无线电射频连接。
5 接入点可以使用哪两种身份验证方法？ （选择两项。）
WEP WPA EAP ASCII 预共享密钥
6 哪项接入点功能允许网络管理员定义可以进入无线网络的数据类型？
加密 黑客攻击拦截 通信过滤 MAC 地址过滤 身份验证
对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料电试力卷保相护互装作置用调与试相技互术通关，1系电过，力管根保线据护敷生高设产中技工资术艺料0不高试仅中卷可资配以料置解试技决卷术吊要是顶求指层，机配对组置电在不气进规设行范备继高进电中行保资空护料载高试与中卷带资问负料题荷试2下卷2，高总而中体且资配可料置保试时障卷，各调需类控要管试在路验最习；大题对限到设度位备内。进来在行确管调保路整机敷使组设其高过在中程正资1常料中工试，况卷要下安加与全强过，看度并22工且22作尽22下可22都能22可地护以缩1关正小于常故管工障路作高高；中中对资资于料料继试试电卷卷保破连护坏接进范管行围口整，处核或理对者高定对中值某资，些料审异试核常卷与高弯校中扁对资度图料固纸试定，卷盒编工位写况置复进.杂行保设自护备动层与处防装理腐置，跨高尤接中其地资要线料避弯试免曲卷错半调误径试高标方中高案资等，料，编试要5写、卷求重电保技要气护术设设装交备备置底4高调、动。中试电作管资高气，线料中课并敷3试资件且、设卷料中拒管技试试调绝路术验卷试动敷中方技作设包案术，技含以来术线及避槽系免、统不管启必架动要等方高多案中项；资方对料式整试，套卷为启突解动然决过停高程机中中。语高因文中此电资，气料电课试力件卷高中电中管气资壁设料薄备试、进卷接行保口调护不试装严工置等作调问并试题且技，进术合行，理过要利关求用运电管行力线高保敷中护设资装技料置术试做。卷到线技准缆术确敷指灵设导活原。。则对对：于于在调差分试动线过保盒程护处中装，高置当中高不资中同料资电试料压卷试回技卷路术调交问试叉题技时，术，作是应为指采调发用试电金人机属员一隔，变板需压进要器行在组隔事在开前发处掌生理握内；图部同纸故一资障线料时槽、，内设需，备要强制进电造行回厂外路家部须出电同具源时高高切中中断资资习料料题试试电卷卷源试切，验除线报从缆告而敷与采设相用完关高毕技中，术资要资料进料试行，卷检并主查且要和了保检解护测现装处场置理设。备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。

思科第一学期期末考试考题CCNA1

思科第一学期期末考试考题CCNA1

1Refer to the exhibit. Which Layer 2 protocol could be used inside nework A and network C?IPTCPUDPEthernet2Refer to the exhibit. Which set of devices contains only intermediary devices?A, B, D, GA, B, E, FC, D, G, IG, H, I, J3Refer to the exhibit. The headers added at each layer are shown. Which layer adds the destination and source process num ensure that data is delivered to the correct application?physical layerdata link layernetwork layertransport layer4The Layer 4 header contains which type of information to aid in the delivery of data?service port numberhost logical addressdevice physical addressvirtual connection identifier5Which fiber connector supports full-duplex Ethernet?6Which device should be used for routing a packet to a remote network?access switchDHCP serverhubrouter7Refer to the exhibit. Host A sends a frame to host C with a destination MAC address CC. The MAC address for host C is no table of switch SW1. How will SW1 handle the frame?Switch SW1 will drop the frame.Switch SW1 will forward the frame to host C.Switch SW1 will flood the frame out all ports.Switch SW1 will flood the frame out all ports except port Fa0/1.8Refer to the exhibit. A network technician has made several changes to R1 since the configuration has last been saved. Th configuration did not produce the desired changes. The technician wants to store a backup copy of the saved configuration before reloading. Which action will cause the unmodified data to be saved on the T?9Which three statements are true about network layer addressing? (Choose three.)It uniquely identifies each host.It assists in forwarding packets across internetworks.It uses a logical 32-bit IPv4 address.It is not a configurable address.It is a physical address.It identifies the host from the first part of the address.10What is the result of using the clock rate 56000 command at the serial interface of the router?The interface is configured as a DCE device.The interface timers are cleared.The FastEthernet interface is made to emulate a serial interface by assigning it a timing signal.The IP address for the serial interface is configured.11Examine the graphic with current configurations. Host A in the Clerical office failed and was replaced. Although a ping to 12 successful, the replacement computer cannot access the company network. With proxy ARP disabled on the Fa0/0 interfac York router, what is the likely cause of the problem?network card failurenetwork cables unpluggedIP address incorrectly enteredsubnet mask incorrectly entered12As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?255.255.0.0255.255.248.0255.255.252.0255.255.254.0255.255.255.0255.255.255.12813Which OSI layer uses a connection-oriented protocol to ensure reliable delivery of data?application layerpresentation layersession layertransport layer14 A network has grown too large for technicians to configure network addresses and hosts files for name resolution. Which twlayer services should be added to the server to allow these needs to be satisfied dynamically? (Choose two.)DNSFTPDHCPHTTPSMTP15Refer to the exhibit. Host A wants to access the Internet. Which combination of a Layer 2 address and a Layer 3 address w access from host A?Destination MAC: 0030.8596.DE83 Default gateway: 209.165.202.130Destination MAC: 0030.8596.DE82 Default gateway: 172.16.9.2Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1Destination MAC: 0030.8517.44C4 Default gateway: 209.165.202.13016 A network administrator is asked to design a new addressing scheme for a corporate network. There are 60 users in the mausers in the branch office, 28 users in manufacturing, 12 in the sales office, and 4 users in the research office. Which VLSM scheme that uses the 192.168.88.0/24 network will fulfill the requirements while wasting the fewest addresses?192.168.88.0/26 main192.168.88.32/26 branch192.168.88.64/26 manufacturing192.168.88.96/27 sales192.168.88.128/28 research192.168.88.0/26 main192.168.88.64/26 branch192.168.88.128/27 manufacturing192.168.88.160/28 sales192.168.88.176/29 research192.168.88.0/27 main192.168.88.32/27 branch192.168.88.64/28 manufacturing192.168.88.80/29 sales192.168.88.88/30 research192.168.88.0/27 main192.168.88.64/28 branch192.168.88.80/28 manufacturing192.168.88.96/29 sales192.168.88.104/30 research17Which physical connector type is used for a serial V.35 connection to the CSU/DSU?18Refer to the exhibit. Which two facts can be determined about the topology? (Choose two.)Four collision domains are present.One logical network is represented.Two broadcast domains are present.Three networks are needed.Three logical address ranges are required.19What are three characteristics of CSMA/CD? (Choose three.)It monitors the media for presence of a data signal.After detecting a collision, hosts can resume transmission after a random timer has expired.A jam signal is used to ensure that all hosts are aware that a collision has occurred.Devices can be configured with a higher transmission priority.Data is transmitted only when the data signal is present.It uses a token system to avoid collisions.20Refer to the exhibit. The serial interface of the router was configured with the use of the commands that are shown. The rou ping the router that is directly connected to interface serial 0/0/0. What should the network technician do to solve this probleConfigure the description at interface serial 0/0/0.Configure an IP address on interface serial 0/0/0.Remove the no shutdown command at interface serial 0/0/0Reboot the router.21Which OSI layer uses the header information to reassemble the data segments into streams?application layernetwork layerpresentation layersession layertransport layer22Refer to the exhibit. The NAT functionality of the router is enabled to provide Internet access to the PC. However, the PC is to access the Internet. Which IP address should be changed to 209.165.201.1 to enable the PC to access the Internet?192.168.1.191192.168.1.101192.168.1.1192.168.1.25423Refer to the exhibit. A technician uses the nslookup command on the PC and views the output that is displayed in the exhthe IP address of the primary domain name server used by the host?10.10.10.32192.168.1.5192.168.1.99192.168.2.10024Which memory contents will change as a result of using the Router# erase startup-config command on a router?RAMROMflashNVRAM25While configuring a router, a network technician wants to name the router. Which prompt should the technician see when e hostname command?Router>Router#Router(config)#Router(config-line)#26Refer to the exhibit. The PC, the routing table of which is displayed, is configured correctly. To which network device or inte the IP address 192.168.1.254 belong?PCswitchrouter interface fa0/0router interface fa0/127Refer to the exhibit. A network administrator is troubleshooting a link that is down between Router1 and Router2. To correc which wire pairs need to be switched on one of the Ethernet cable ends?pair 1 and pair 2pair 1 and pair 3pair 2 and pair 3pair 2 and pair 428Refer to the exhibit. A PC is connected to a network. Which action will verify that the PC can communicate with its default gUse the ping 127.0.0.1 command.Use the ipconfig command.Use the ipconfig/all command.Use the ping 10.0.0.254 command.29Refer to the exhibit. Host B was powered off. What change will occur in the MAC table of the switch?The table will remain unaffected.The switch will remove the MAC address at Fa0/19.The switch will retain the MAC address until host B is powered on again.The switch will rebuild the MAC table by assigning the FFFF.FFFF.FFFF address to port Fa0/19.30What information is contained in the header of Layer 3 to help data delivery?port numberdevice physical addressdestination host logical addressvirtual connection identifier31 A network technician is tasked with setting up a network for six users, but the users should be able to use their accounts toany of the six computers. What type of network should be used?workgroupP2P applicationspeer-to-peer networkclient-server network32Refer to the exhibit. A web browser is running on host PC1 with an IP address 10.10.2.2/24. A dynamic port number of 491 assigned to the browser. The browser sends a request for a web page to the web server with an IP address 192.168.1.254 statement is true?The session is established using TCP, and the socket number for the web server is 192.168.1.254: 80.The session is established using TCP, and the socket number for the web server is 192.168.1.254: 49152.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 80.The session is established using UDP, and the socket number for the web server is 192.168.1.254: 49152.33Refer to the exhibit. An administrator on PC1 wants to view some HTML code from a web page housed on the web server.application will allow this request to be started?34Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on Router1?ana Telnet clienta terminal emulation programa web browser35What are two characteristics of the data link layer? (Choose two.)It segments and reorders the data.It exchanges the frames between nodes.It defines the method by which network devices place data onto the media.It manages the transfer of data between the processes that run on each host.It retrieves signals from the media and restores them to their bit representations.36 A network administrator wants to restrict access to the router privileged EXEC mode. Which password should the administrenableauxconsoleVTY37Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)172.16.4.63 /26172.16.4.129 /26172.16.4.191 /26172.16.4.51 /27172.16.4.95 /27172.16.4.221 /2738Refer to the exhibit. Host X is unable to communicate with host Y. Which command can be run at host X to determine which intermediary device is responsible for this failure?telnet 192.168.1.1ping 192.168.1.1tracert 192.168.1.139Refer to the exhibit. Which option shows the correct topology given the configuration of Router1?40If an administrator wished to return a router to the default state, what additional step must be taken after issuing the comma start-up config?Reload the device.Issue the command copy running-config start-up config.Perform a show running-config to verify that the removed.Enter the interface commands to allow the device to connect to the network.41By using the ipconfig command, a network administrator determines that a workstation has the address 192.168.3.38 with the subnet mask. To what network does the workstation belong?192.168.3.8192.168.3.16192.168.3.24192.168.3.3242Which statement is true about router hostnames?A hostname should be unique on each router.A router hostname cannot contain capital letters.A router hostname is configured in privileged executive mode.A router hostname must be created before any other configurations can be added to the device.43 A user types the enable command. What task can be performed at the privileged EXEC mode?Configure the device.Configure individual interfaces.Configure individual terminal lines.Issue show and debug commands.44Refer to the exhibit. Which logical topology describes the exhibited network?starringpoint-to-pointmulti-access45Refer to the exhibit. A user wants to access the Internet from the PC. A part of the running configuration of the router is sho default gateway IP address should be configured at the PC to enable this access?10.1.192.110.1.192.210.1.192.54192.31.7.146Which statement is true about the ICMP protocol?It is an application layer protocol.It is designed to make IP a reliable protocol.It is often filtered out of networks for security purposes.If a host does not respond to an ICMP echo request, the host is not functioning.47Refer to the exhibit. At which OSI layer is serial interface 0/0/1 experiencing problems?Layer 1Layer 2Layer 3Layer 448Refer to the exhibit. The host was disconnected from switch 2 and connected to switch 1. Which combination of IP address mask, and default gateway should be assigned to this host to allow it to function in the network?IP address: 10.10.9.37 Subnet mask: 255.255.255.240 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.29 Subnet mask: 255.255.255.248 Default gateway: 10.10.9.35IP address: 10.10.9.32 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 196.1.105.6IP address: 10.10.9.63 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.3549Refer to the exhibit. The diagram represents the process of sending email between clients. Select the list below that correc the component or protocol used at each numbered stage of the diagram.1.MUA2.MDA3.MTA4.SMTP5.MTA6.POP7.MDA8.MUA1.MUA2.POP3.MDA4.SMTP5.MTA6.MDA7.SMTP8.MUA1.MUA2.POP3.SMTP4.MDA5.MTA6.SMTP7.POP8.MUA1.MDA2.SMTP3.MTA4.SMTP5.MTA6.MUA7.POP8.MDA1.MUA2.SMTP3.MTA4.SMTP5.MTA6.MDA7.POP8.MUA50What is the Cisco IOS?system software for Cisco devicesRead Only Memory in Cisco devicesnon-volatile storage for device configurationsan initial operating system that is used for boot functions。

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

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，会使用访问列表?A. to control vty access into a routerA.控制通过VTY访问器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.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试题集(英文版)有详细讲解和答案

CCNA试题集(英文版)有详细讲解和答案

640-607Cisco Certified Network Associate 3.0CCNA 3.0Demo Version 4.0Important NotePlease Read CarefullyStudy TipsThis product will provide you questions and answers along with detailed explanations carefully compiled and written by our experts. Try to understand the concepts behind the questions instead of cramming the questions. Go through the entire document at least twice so that you make sure that you are not missing anything. Further MaterialFor this test TestKing also provides:* Study Guide. Concepts and labs.* Interactive Test Engine Examinator. Check out an Examinator Demo at/index.cfm?pageid=724Latest VersionWe are constantly reviewing our products. New material is added and old material is revised. Free updates are available for 90 days after the purchase. You should check your member zone at TestKing an update 3-4 days before the scheduled exam date.Here is the procedure to get the latest version:1.Go to 2.Click on Member zone/Log in3.The latest versions of all purchased products are downloadable from here. Just click the links.For most updates, it is enough just to print the new questions at the end of the new version, not the whole document.FeedbackFeedback on specific questions should be send to feedback@. You should state: Exam number and version, question number, and login ID.Our experts will answer your mail promptly.QUESTION NO: 1Which of the following troubleshooting tools use the protocol ICMP? (Choose two)A.PingB.TelnetC.ConfigureD.Trace routeE.Show commandsF.Standard access listAnswer: A, DExplanation: The two protocol tools that use ICMP messaged to perform their function are ping and trace route.Incorrect Answers:B: Telnet uses TCP.C:Configure is not a protocol tool.E:They are not part of ICMP, nor do they use ICMP.Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 217-218.QUESTION NO: 2Which one of the following is a layer two broadcast?A.The IP subnet used is 255.255.255.0B.The IP address used is 255.255.255.255C.The MAC address used is 00-00-00-00-00-00D.The MAC address used is FF-FF-FF-FF-FF-FF.Answer: DExplanation: The MAC address for a broadcast is FF-FF-FF-FF-FF-FF.Incorrect Answers:A and B: These are IP addresses and 802.3 uses MAC addresses.C:This is the address used for a multicast.Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 149-152.QUESTION NO: 1Exhibit:The network administrator of the TestKing1 router adds the following command to the router configuration: ip route 192.168.12.0 255.255.255.0 172.16.12.1What are the results of adding this command? (Choose two)A.The command establishes a static route.B.The command invokes a dynamic routing protocol for 192.168.12.0.C.Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.D.Traffic for all networks is forwarded to 172.16.12.1.E.This route is automatically propagated throughout the entire network.Answer: A, CExplanation:IP route command defines static route on a particular router, Traffic from 192.168.12.0 network is forwarded to 172.16.12.1 ( IP address of next hop interface).Incorrect answersB: It will not invoke any routing Protocol. It defines static route.D: Only traffic from 192.168.12.0 network is forwarded to 172.16.12.1.E: It will not propagate route automatically by using ip route command. Route will be propagated only if you defined routing protocol configured networks.QUESTION NO: 2What does a configuration Register Setting of 0x2105 indicate to the Router?A.The Boot IOS Code is Located in the NVRAM.B.Check NVRAM for boot system Commands.C.Bypass NVRAM Configurations.D.Boot the IOS Code Located in ROM.E.Perform a Password Recovery.F.Bypass The Code In ROM.Answer: BExplanation:It is stated in the book ICND by Steve McQuerry page 127 that if the configuration register boot field value is from 0x2 to 0xF, the bootstrap code parses any configuration in NVRAM for boot system commands. Incorrect Answers:A: Statement is wrong because IOS code is located in flash not NVRAM (startup-configuration)C: Register setting of 0x2105 where 5 is the boot field. Boot field value of 0x2 to 0xF will look for startup-configuration in the NVRAM and won't be bypass.D: Statement is wrong because IOS code is located in flash not ROM (RxBoot).E: This register is not for password recovery.F: This statement is wrong.QUESTION NO: 3Exhibit:After Configuring the router show in the exhibit, the TestKing technician decides to test and document the network, pings from the technician’s laptop to all of the interface on each router were successful, if a technician initiates a telnet session to Router TestKing1 and issues the show arp command, which of the following items will be among the entries displayed in the output?A.The MAC address of the S0 interface on Router TestKing1B.The MAC address of the E0 interface on Router TestKing1C.The MAC address of the S0 interface on Router TestKing2D.The MAC address of the E0 interface on Router TestKing2Answer: BExplanation: Because the question stated that the technician initiated a telnet session to Testking1 not TestKing2 so the layer 2 destination address will have the TestKing1 MAC address.Incorrect Answers:A, C: Serial interfaces don't have layer 2 addresses (MAC addresses)?D: Telnet initiated from Testking 1. It will not show Mac address of EO on Testking2QUESTION NO: 4Exhibit:*** Out Put Omitted***MTU 1500 bytes, Bw 10000 kbit, Dly 100 Usec.reliability 128/255, txload 1/255. rx 253/255Encapsulation Arpa, Loopback not setKeepalive set (10 sec)Arp type: Arpa Timeout 04:00:00Last Input 21:24:36, output 00:00:08, Output hang never*Out Put Omitted***Users have been complaining that network applications are running very slowly and responding to input commands intermittently. While troubleshooting the problem, a TestKing technician issues the slow interface E0 command on the router attached to the network. Based on the partial output shown in the exhibit.. Which of the following items indicates that interface E0 is overloaded and causing the networkto perform slowly?A.MTU 1500 bytesB.BW 10000 kbitC.DLY 1000 usecD.Reliability 128/255E.txload 1/255F.rxload 253/255Answer: DExplanation: Interface E0 is only 50% reliable (128/255) where 255/255 being 100% reliable.Incorrect Answers:A, B, C: Because those are default settings and those output are the output readings in normal operation.QUESTION NO: 5Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)A.Transport layer divides a data stream into segments & adds reliability & flow control informationB.Data link layer adds physical source & destination address & an FCS to the segmentC.Packets are created when the network layer encapsulate a frame with source & destination host address& protocol related control informationD.Packets are created when the network layers adds layers 3 address & control information to a segmentE.The presentation layer translated bits into bits into voltages for transmission across the physical link Answer: A, DExplanation:A: It is the function of Transport layer. TCP and UDP operates in this layerD: It is the function of the network layer.Incorrect answers:B: It will use frames instead of segments.C: The network layer can not encapsulate frame. It adds Layer 3 address to segment received from transport layer.E: It is not the function of Presentation layer. It is function of Physical layer.。

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1. 1. QuestionWhat is a result of connecting two or more switches together?o The number of broadcast domains is increased.o The size of the broadcast domain is increased.o The number of collision domains is reduced.o The size of the collision domain is increased.2. 2. QuestionRefer to the exhibit. How many broadcast domains are there?CCNA1 v6.0 Chapter 8 Exam 005o 1o 2o 3o43. 3. QuestionWhat are two reasons a network administrator might want to create subnets?(Choose two.)o simplifies network designo improves network performanceo easier to implement security policieso reduction in number of routers neededo reduction in number of switches needed4. 4. QuestionRefer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?CCNA1 v6.0 Chapter 8 Exam 007o 255.255.255.0o 255.255.255.128o 255.255.255.192o 255.255.255.224o 255.255.255.2405. 5. QuestionRefer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has beensubnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the newnetwork (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?CCNA1 v6.0 Chapter 8 Exam 004o IP address: 192.168.10.65 subnet mask: 255.255.255.240, default gateway: 192.168.10.76o IP address: 192.168.10.38 subnet mask: 255.255.255.240, default gateway: 192.168.10.33o IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33o IP address: 192.168.10.41 subnet mask: 255.255.255.248, default gateway: 192.168.10.46o IP address: 192.168.10.254 subnet mask: 255.255.255.0, defaultgateway: 192.168.10.16. 6. QuestionIf a network device has a mask of /28, how many IP addresses are available for hosts on this network?o 256o 254o 62o 32o 16o 147. 7. QuestionWhich subnet mask would be used if 5 host bits are available?o 255.255.255.0o 255.255.255.128o 255.255.255.224o 255.255.255.2408. 8. QuestionHow many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?o 510o 512o1022o 1024o 2046o 20489. 9. QuestionHow many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?o twoo threeo fouro five10. 10. QuestionA network administrator wants to have the same network mask for allnetworks at a particular small site. The site has the following networks and number of devices:IP phones – 22 addressesPCs – 20 addresses neededPrinters – 2 addresses neededScanners – 2 addresses neededThe network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?o 255.255.255.0o 255.255.255.192o 255.255.255.224o 255.255.255.240o 255.255.255.248o 255.255.255.25211. 11. QuestionA company has a network address of 192.168.1.64 with a subnet mask of255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks wouldachieve that? (Choose two.)o 192.168.1.16/28o 192.168.1.64/27o 192.168.1.128/27o 192.168.1.96/28o 192.168.1.192/2812. 12. QuestionA network administrator is variably subnetting a network. The smallestsubnet has a mask of 255.255.255.248. How many usable host addresses will this subnet provide?o 4o 6o 8o 10o 1213. 13. QuestionRefer to the exhibit. Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224 for all subnets, how many total host addresses are unused in the assigned subnets?CCNA1 v6.0 Chapter 8 Exam 001o 56o 60o 64o 68o7214. 14. QuestionRefer to the exhibit. Considering the addresses already used and having to remain within the 10.16.10.0/24 network range, which subnet address could be assigned to the network containing 25 hosts?CCNA1 v6.0 Chapter 8 Exam 002o 10.16.10.160/26o 10.16.10.128/28o 10.16.10.64/27o 10.16.10.224/26o 10.16.10.240/27o 10.16.10.240/2815. 15. QuestionA network administrator needs to monitor network traffic to and fromservers in a data center. Which features of an IP addressing scheme should be applied to these devices?o random static addresses to improve securityo addresses from different subnets for redundancyo predictable static IP addresses for easier identificationo dynamic addresses to reduce the probability of duplicate addresses 16. 16. QuestionWhich two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)o It eliminates most address configuration errors.o It ensures that addresses are only applied to devices that require apermanent address.o It guarantees that every device that needs an address will get one.o It provides an address only to devices that are authorized to be connected to the network.o It reduces the burden on network support staff.17. 17. QuestionA DHCP server is used to assign IP addresses dynamically to the hosts on anetwork. The address pool is configured with 192.168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts?o 254o251o 252o 25318. 18. QuestionRefer to the exhibit. A company is deploying an IPv6 addressing scheme for its network. The company design document indicates that the subnet portion of the IPv6 addresses is used for the new hierarchical network design, with the s ite subsection to represent multiple geographical sites of the company, the s ub-site section to represent multiple campuses at each site, and thes ubnet section to indicate each network segment separated by routers. With such a scheme, what is the maximum number of subnets achievedper sub-site?CCNA1 v6.0 Chapter 8 Exam 003o 0o 4o16o 25619. 19. QuestionWhat is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?o 2001:DB8:BC15o 2001:DB8:BC15:Ao 2001:DB8:BC15:A:1o 2001:DB8:BC15:A:1220. 20. QuestionConsider the following range of addresses:2001:0DB8:BC15:00A0:0000::2001:0DB8:BC15:00A1:0000::2001:0DB8:BC15:00A2:0000::…2001:0DB8:BC15:00AF:0000::The prefix-length for the range of addresses is /6021. 21. QuestionMatch the subnetwork to a host address that would be included within the subnetwork. (Not all options are used.)CCNA1 v6.0 Chapter 8 Exam 0122. 22. QuestionRefer to the exhibit. Match the network with the correct IP address and prefix that will satisfy the usable host addressing requirements for each network. (Not all options are used.)CCNA1 v6.0 Chapter 8 Exam 006。

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