CCNA考试练习题

1、1) What were the two challenges of creating a network model (Select two) (创建网络模型所遇到的两个挑战是什么(选择2个) )？A. interconnectivityB. interactionC. internetworkingD. interoperability A，D。互通性和互操作性创建网络模型的挑战。2) The Advanced Research Projects Agency created what network(高级研究计划局( A R PA )创建了什么网络)？A. EthernetB. FDDI

2、C. ARPANETD. Token RingC。A R PA N E T由D A R PA项目创建。3) What does OSI stand for (OSI代表什么)？A. Organization for Standards InstituteB. Organization for Internet StandardsC. Open Standards InstituteD. Open Systems InterconnectionD。O S I代表开放系统互连。4) What are the layers of the OSI reference model, in order (

3、OSI参考模型有哪些层，按顺序回答)？A. application, transport, network, physicalB. application, presentation, session, network, transport, data link, physicalC. application, presentation, session, transport, network, data link, physicalD. application, session, transport, physical5) What is the term for wrapping a da

4、ta unit with a header and passing it to the next protocol(用报头包装一个数据信元并传递到下一个协议，代表这个过程的术语是什么)？A. WindowingB. EncapsulationC. WrappingD. Heading6) Which of the following is not defined at the physical layer of the OSI reference model (在O S I参考模型的物理层中没有定义下面的哪一个)？A. hardware addressesB. bitstream transm

5、issionC. voltage levelsD. physical interface7) Which standards institute created the 802 series of physical/data link layer standards (哪个标准协会创建了物理/数据链路层标准的8 0 2系列)？A. ANSIB. DIXC. ITU-TD. IEEE8) Who created Ethernet (谁创建了E t h e r n e t )？A. ANSIB. DIXC. ITU-TD. IEEE9) What is the function of CSMA/C

6、D (CSMA/CD的功能是什么)？A. It passes a token around a star topologyB. Nodes access the network and retransmit if they detect a collisionC. Nodes connect to a dual ring of fiber-optics and use a token-passing schemeD. Nodes break the frames into tiny cells and forward them through a cell-switching network.

7、10) What is a backoff algorithm? (什么是补偿算法)？A. It is the fault tolerance calculation for FDDIB. It is a routing calculation for determining the best routeC. It is the notification that a serious error has occurred on the networkD. It is the duration calculation to delay retransmission after a collisi

8、on, beforeretransmitting in Ethernet.11) IBMs Token Ring specification is nearly identical and compatible with IEEEs 802.5specification( IBM的令牌环网规范几乎和I E E E的8 0 2 . 5规范一样而且兼容)。A. TrueB. False12) What is beaconing (什么是信标)？A. It is the fault tolerance calculation for FDDIB. It is a routing calculatio

9、n for determining the best routeC. It is the notification that a serious error has occurred on the networkD. It is the duration calculation to delay retransmission after a collision, beforeretransmitting in Ethernet13) What two types of frames are found on a Token Ring network (在令牌环网中可以找到哪两种类型的帧)？A.

10、 TokenB. Frame check sequenceC. DataD. Address14) The FDDI specification includes which layers of the OSI reference model (FDDI规范包含O S I参考模型的哪层)？A. Physical and networkB. Physical and transportC. Physical and MAC sublayer of data linkD. Physical and data link15) What is RS-232 (什么是R S - 2 3 2 )？A. A

11、 standard serial port interfaceB. A high-speed serial interfaceC. An ISDN interfaceD. An ATM switch16) What is the maximum data transmission rate for HSSI (什么是H S S I的最大数据传输速率)？A. 64 KbpsB. 256 KbpsC. 100 MbpsD. 52 Mbps17) What does the hierarchical network layer address provide (层次式网络层地址提供了什么)？A. T

12、he hardware addressB. The node address and the hardware addressC. The network address and the node addressD. The network address mapped to the hardware address18) What qualities match TCP (TCP具有哪些特点)？A. connectionless, reliableB. connection-oriented, reliableC. connectionless, unreliableD. connectio

13、n-oriented, unreliable19) What layer of the OSI reference model specifies data formats, such as encryption (OSI参考模型的哪层规定了数据格式。例如加密)？A. applicationB. presentationB. sessionD. transportE. networkF. data linkG. physical20) What is out-of-band management (什么是带外管理)？A. It is the ability to manage a switch

14、 or hub from a networked workstationB. It is the addition of a network management module to a hubC. It is the fault tolerance feature of the dual ring FDDI creating a single ringD. It is the ability to manage a device using a connection other than the network.21) Interoperability means (互操作性的含义)：A.

15、Transfer of data between systemsB. Ability to make data understandable by machines that use different operating systems,hardware or languages.C. Agreement between two equipment vendors for processing dataD. Ability of LAN to communicate with WA N22) OSI is what kind of standard (OSI是何种类型的标准)？A. a st

16、andard created by major telecommunications service providersB. a de facto standardC. a de jure standardD. a standard created by major equipment manufacturers23) The layered approach of the OSI results in (OSI的分层方法的结果是)：A. Increased development costs for a specific vendor productB. Increased marketab

17、ility for a specific vendor productC. A hierarchical tool for network architectureD. All of the aboveE. B & C onlyF. A & C only24) Which of the following statements is true in general when an application at the sourcewishes to send data to an application at the destination address (当源端的一个应用程序希望发送数据到

18、目的地址的另一个应用程序时，下面的哪些陈述一般是正确的)？A. The lower layer at destination adds its own header information to the data it receives fromthe higher layerB. The lower layer at source adds its own header information to the data it receives from thehigher layerC. The lower layer at destination strips header informat

19、ion from the data added by the higherlayerD. The higher layer at source strips header information added to the data by the lower layer25) In the OSI model, encapsulation of the data may occur at (在O S I模型中，数据的封装发生在)：A. Layer 7 of the sourceB. Layer 1 of the destinationC. Layer 7 of the destinationD.

20、 All layers at sourceE. Layer 1 of the source26) The session layer functionality in the OSI model is usually implemented (OSI模型中的会话层功能通常如何实现)：A. At user premisesB. In hardwareC. In softwareD. In hardware and software27) At the physical layer in the OSI model the data is broken into (在O S I模型中的物理层中，数

21、据分解为)：A. cellsB. fragmentsC. bitsD. packets28) Collision in a CSMA/CD network is said to occur when (CSMA/CD网络中的冲突会在什么时候发生)：A. A node listens to the network and hears nothingB. A node receives a message from the networkC. Two nodes hear nothing and then transmit data simultaneouslyD. A node on the n

22、etwork has physical failure29) A broadcast system means (广播系统的含义是)：A. Only few nodes on the network see the data meant for these nodesB. All nodes on the network see all the data framesC. Network informs all the nodes of a network failureD. None of the above30) Which statements are true of a preambl

23、e in the IEEE 802.3 frame (对IEEE 802.3帧前导符的陈述哪一个是正确的)？A. It is an indication that a node is receiving a new frameB. It contains all zeroesC. It contains all onesD. It contains alternating zeros and onesE. A and B onlyF. A and D onlyG. A and C only31) A Frame Check Sequence (FCS) in the IEEE 802.3 fr

24、ame includes (IEEE 802.3帧中的帧校验序列( F C S )包括)：A. A receiving station addressB. A source station addressC. A Cyclic Redundancy Check (CRC) valueD. A sequence number of the frame32) In a Token Ring network architecture, what does it mean when a node possesses a token(在令牌环网结构中，当一个节点拥有令牌时，这意味着什么)？A. The

25、node has the ability to transmit the data to the networkB. The node has the right to pass the data to the networkC. The node has the right to retain the tokenD. None of the above33) In a Token Ring network architecture, if a node receives a token and has data to transmit,then (在令牌环网结构中，如果一个节点收到一个令牌，

26、并且有数据要传输，则)：A. The node does nothingB. The node waits for data to be transmittedC. The node converts the token into a start-of-frame fieldD. None of the above34) What is the main purpose of the dual ring architecture in Fiber Distributed Data Interface(FDDI) (光纤分布式数据接口( F D D I )中的双环体系结构的主要目的是什么)？A.

27、 To increase traffic on the networkB. To allow bi-directional traffic on the networkC. To provide fault toleranceD. To provide one path for traffic from selected nodes35) Which statement is true of the Media Access Control (MAC) address (对介质访问控制( M A C )地址的陈述中，哪一个是正确的)？A. It is dependent on the hard

28、ware locationB. It is dependent on the network typeC. It is assigned by a vendorD. It changes every time the hardware is plugged turned on and off36) The Basic Rate Interface (BRI) in ISDN has (ISDN中的基本速率接口( B R I )具有)：A. One B channel and one D channelB. 23 B channels and one D channelC. Two B chan

29、nels and one D channelD. Two D channels and one B channel37) Synchronization of network timing is done at which layer (网络计时的同步是在哪一层完成的)？A. Data link layerB. Transport layerC. Physical layerD. Session layer38) What is a Network Control Protocol (NCP) frame in a Point to Point Protocol (PPP) usedfor (

30、在点对点协议( P P P )中网络控制协议( N C P )帧的作用是什么)？A. Establishing and configuring a connectionB. Encryption of dataC. Assigning a dynamic addressD. Selecting and configuring the network layer protocol39) In a Frame Relay network, which statement is true of Forward Explicit Congestion(FECN) when the network is

31、 congested (在帧中继网络中，当网络拥塞时，关于F E C N的陈述，哪一个是正确的)？A. It is a bit that is set to “0”B. It is a bit that is set to “1”C. It is sent by DTE to upper protocol layersD. A and C onlyE. B and C only40) Data Link Connection Identifier (DLCI) in a Frame Relay network identifies what (帧中继网络中的数据链路连接标识符( D L C I

32、 )标识什么)？A. Data Terminal Equipment (DTE)B. Data Circuit Termination Equipment (DCE)C. A connection between two DTEsD. All of the above41) How does a Permanent Virtual Circuit (PVC) in a Frame Relay network differ from aSwitched Virtual Circuit (SVC) (帧中继网络中的永久虚电路( P V C )如何与交换虚电路( S V C )区分)？A. It i

33、s a permanently established linkB. It terminates after the call has endedC. It has a data transfer phaseD. It has an idle phase42) The ITU X.25 Standard describes protocol for which layer or layers (ITUX.25标准说明了哪个层或哪些层的协议)？A. physical layerB. session layerC. transport layerD. data link layerE. netwo

34、rk layerF. A, B and C onlyG. A, D and E onlyH. A,C and D only43) X.25 can handle data rates up to (X.25处理定义数据速率达到)：A. 1024 KbpsB. 256 KbpsC. 512 KbpsD. 768 Kbps44) Asynchronous Transfer Mode (ATM) is a (异步传输模式( AT M )是)：A. Packet-switching technologyB. Frame-switching technologyC. Cell-switching tec

35、hnologyD. Circuit-switching technology45) How many header formats are there in ATM terminology (在AT M术语中，共有多少个报头格式)？A. 5B. 4C. 3D. 2E. 146) Which of the following uses Internetwork Operating System (IOS) (下面的哪一个使用网络互联操作系统( I O S ) )？A. BridgesB. DMS-100C. 4ESSD. Cisco routersE. 5ESS47) How many swit

36、ching modes are included in Catalyst 1900/2820 switches (在C a t a l y s t1 9 0 0 / 2 8 2 0交换机中包含了多少个交换模式)？A. 1B. 2C. 3D. 41) What command would you use to log out of the router and end your session (Select two.)(你将使用什么命令在路由器上注销和结束会话？ (选择2个) )A. TERMINATEB. logoutC. exitD. session end2) If you type a

37、 command that the router doesnt recognize, what will the router do (如果输入了一个路由器无法识别的命令，路由器将如何动作)？A. Display an error messageB. Try to resolve the command to an IP addressC. Try to execute the closest command it can find in its command setD. Invalidate the configuration3) You can confirm that you are

38、in the privileged EXEC mode by which prompt (在哪种提示符下可以确认是处于特权E X E C模式)？A. RouterB. Router(config)#C. Router#第2章从Cisco IOS软件开始51下载D. Router(config-if)#4) A reload of the router is required to get the configuration changes to take place (为了使配置的改动生效，需要重新加载路由器)。A. TrueB. False5) By default, how many co

39、mmands are stored in the command history buffer (默认情况下，在命令历史缓冲区内存储了多少条命令)？A. 5B. 10C. 15D. 206) The IOS image is normally stored in (IOS映像通常保存在哪里)？A. RAMB. NVRAMC. SharedD. Flash7) The startup configuration file is stored in NVRAM (启动配置文件保存在N V R A M中)。A. TrueB. False8) To determine the operational

40、status of an interface, which command do you use (为确定接口的操作状态，要使用哪个命令)？A. DISPLAN INTERFACE STAT U SB. show interfaceC. show status interfaceD. display interface9) The boot field consists of (引导字段包括)：A. The lowest four bits of the configuration registerB. The same as the configuration registerC. The

41、highest four bits of the configuration registerD. Bits 4 through 7 of the configuration register10) A boot field value of 0x1 will cause the router to (引导字段值为0 x 1，这将导致路由器)：A. Boot from FlashB. Look for boot system commands in the startup configurationC. Look for an IOS image on a TFTP serverD. Boot

42、 from ROM11) To view the configuration register settings, which command do you enter (为查看配置注册表设置，你需要输入哪个命令)？A. SHOW RUNNING-CONFIGURAT I O N52 CCNA学习指南下载B. show startup-configurationC. show versionD. show controllers12) What command is required to send Debug output to a VTY session (为将调试输出发送到V T Y会话

43、中，需要哪个命令)？A. SHOW DEBUGB. show logC. terminal monitorD. debug all13) Which keystroke would you use to recall the previous command in the command historyb u ffer (回调命令历史缓冲区中的前一条命令，需要哪个键盘命令)？A. CTRL-NB. CTRL-PC. ESC-PD. ESC-F14) You must have an IP address assigned to an Interface in order for CDP to

44、operate (你必须具有指定给接口的I P地址，目的是使C D P工作)。A. TrueB. False15) What is the command to view the stored configuration in NVRAM (查看存储在N V R A M中的配置信息的命令是什么)？A. SHOW RUNNING-CONFIGB. show startup-configC. show versionD. show NVRAM16) When do configuration commands take effect (什么时候配置命令生效)？A. When you reload

45、the routerB. When they are saved in NVRAMC. As soon as you press the ENTER keyD. When you enter the command ENABLE.17) What command is needed to see if an interface is up and operational (为了解接口是否活跃并可操作，需要使用哪个命令)？A. SHOW CONTROLLERSB. show running-configC. show interfaceD. show buff e r s18) What is

46、the best command to enter to determine which release of IOS the router isrunning (为确定路由器正在运行的I O S的版本，最好输入哪个命令)？A. SHOW FLASHB. show running-configC. show startup-configD. show version19) What is the command needed to copy the current operational configuration to a TFTPserver (为将当前运行的配置复制到T F T P服务器

47、上，需要哪个命令)？A. COPY RUNNING-CONFIG TFTPB. copy startup-config tftpC. copy tftp running-configD. copy tftp startup-config20) What command would you use to see information about all the protocols enabled in therouter (为查看路由器中可以使用的所有协议的信息，你将使用哪个命令)？A. DISPLAY PROTOCOL INFORMAT I O NB. display protocolsC.

48、 show protocol routeD. show protocols21) What is the part of the IOS software that provides the user interface and interprets thecommands you type (IOS软件的哪一部分提供了用户界面和解释你输入的命令)？A. The virtual terminalB. The command executiveC. The console portD. The configuration register22) What command allows you t

49、o view the configuration in RAM (什么命令允许你查看R A M中的配置)？A. SHOW STA RT U P - C O N F I GB. show RAM-configC. show running-configD. show config23) Which of the following represents access via a physical connection of a terminal to arouter (下面的哪一种说法代表了通过终端到路由器的物理连接而进行访问)？A. Virtual terminalB. IOSC. Conso

50、leD. All of the above24) What command would you use to view the name of the filename in Flash memory (为查看闪存中的文件名称，将使用哪个命令)？A. SHOW MEMORY ALLB. show flashC. show filenameD. show flash partitions25) What is the level of access to the router in which you are allowed to change the routersconfiguration

51、(在哪个对路由器的访问级别中，可以允许你修改路由器的配置)？A. User EXEC modeB. High-level access modeC. Privileged EXEC modeD. Console mode26) Changes to the router configuration are allowed from the user EXEC mode (从用户模式可以修改路由器配置)。A. TrueB. False27) How can you confirm you are in privileged EXEC mode (如何可以确认你处于特权E X E C模式)？A.

52、By issuing the command CONFIRM MODEB. By viewing the output of the SHOW VERSION commandC. By noting the routers promptD. None of the above28)After giving the command INTERFACE ETHERENT0 from global configuration mode,the router is most likely to respond with ( 在从全局配置模式接收到命令I N T E R FA C EE T H E R

53、N E T 0之后，路由器最可能以什么形式作出响应)：A. router(config)#B. router#interfaceC. router(config-if)#D. router#(config-int)29) To completely get out of the interface configuration mode and back to privileged EXECmode, what should you use ( 为彻底退出接口配置模式和返回到特权E X E C模式，你必须使用)？A. CTRL-ZB. EXITC. END CONFIGD. LOGOUT30)

54、The response to the command ROUTER# CONFIGURE will be (对命令R E O U T E R #C O N F I G U R E的响应应该是)：A. Connect, copy, configureB. Various paths from source to destinationC. router(config)#D. A list of possible options from where the router can be configured31) Which are the types of memory elements in

55、 a Cisco router (Cisco路由器中的内存有哪些类型)？A. RAM, ROM, NVRAM, and BootB. RAM, ROM, NVRAM, and FlashC. Config, RAM, ROM, NVRAM, and FlashD. Buffers, RAM, NVRAM, and Flash32) How do you suspend a Telnet session (如何挂起一个Te l n e t会话)？A. Use the command SUSPEND SESSIONB. Use the keystrokes CTRL-ALT-6C. Use the

56、 keystrokes CTRL-SHIFT-6-XD. A Telnet session cannot be suspended. You must quit the session and initiate it again ifyou want to go back to it.33) What is the characteristic of a link-state routing protocol that enables it to make betterrouting decisions (链路状态路由协议的哪个特点使其作出比较好的路由决策)？A. Its metrics take bandwidth into accountB. It uses a hello protocolC. It broadcasts the contents of its routing table periodically to its neighborsD. None of the above.34) What is the sequence of events that occurs when you