CCNA200-120中文版题库对照.docx

1、CCNA（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 001Refer to the exhibit. What will Router1 do when it receives the data

2、 frame shown? (Choose three.)参照下图，这个图示显示了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.会剥离源地址，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.会剥离源IP地址，以192.168.40

3、.1 代替。C. Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.会剥离源地址，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.会剥离目的IP地址，以192.168.40.1 代替。E. Router1 will forward the data

4、packet out interface FastEthernet0/1.R1将会从F0/1转发这个数据包。F. Router1 will forward the data packet out interface FastEthernet0/2.R1将会从F0/2转发这个数据包数据传输过程中，IP 地址不变，但是在不同的网段中， MAC 地址要根据设备的具体情况而发生改变。在不同网络中，依靠 IP 地址定位，在同一网络中，依靠 MAC 地址定位。QUESTION 002Refer to the exhibit. Which three statements correctly describ

5、e Network Device A? (Choose three.)如图所示，关于网络设备 A 哪三项是正确的描述？A. With a network wide mask of 255.255.255.128, each interface does not require an IP address.如果配置一个 25 位的网络号，每个端口不需要配置一个地址。B. With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.如果配置一

6、个 25 位的网络号，每个端口需要配置一个地址和子网。C. With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other.如果配置一个 24 位的网络号，成为一个二层设备以便让 PC 和其他设备通讯。D. With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.如果配置一个

7、 24 位的网络号，成为一个三层设备以便让 PC 和其他设备通讯。E. With a network wide mask of 255.255.254.0, each interface does not require an IP address.如果配置一个 23 位的网络号，每个端口不需要配置一个地址。QUESTION 003Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see i

8、f enough resources exist for that communication?在 OSI 参考模型当中，哪一层可以判断程序的可用性以机是否有足够的资源来支持这个通讯？A. transport 传输层B. network 网络层 C. presentation 表示层D. session 会话层E. application 应用层QUESTION 004Which of the following describes the roles of devices in a WAN? (Choose three.)下列哪些描述广域网设备的作用？A. A CSU/DSU termina

9、tes a digital local loop联系数字本地环路B. A modem terminates a digital local loopC. A CSU/DSU terminates an analog local loopD. A modem terminates an analog local loop一个模拟信号F. A router is commonly considered a DTE device路由器通常是 DTE 设备G. A router is commonly considered a DCE device路由器通常是 DCE 设备QUESTION 005Re

10、fer to the exhibit, Host A pings interface S0/0 on router 3, what is the TTL value for that ping?如图所示，主机 A 的 ping 路由器 3 的 S0/0 接口，TTL 值会是多少？A. 253B. 252C. 255D. 254QUESTION 006A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remo

11、te server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?网络管理员验证的配置是一个新安装的主机通过建立 FTP 连接到远程服务器。网络管理员这个操作使用的最高协议层是什么？A. application B. presentation C. sessionD. transport E. internet F. data linkFTP 协议属于应用层QUESTION 007Refer to the exhibit. Af

12、ter HostA pings HostB, which entry will be in the ARP cache of HostA to support this transmission?如图所示，主机 ping 主机 B，在此通信中，以下哪个列表将会进入主机 A 的 ARP 缓存？A. B. C. D. E. F.QUESTION 008A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this stat

13、ement, what is known about the network interface port?在一个双绞线网络中的一个网络接口上监测到网络冲突，冲这个表述中，有关这个网络接口，哪一项是正确的？A. This is a 10Mb/s switch port. B. This is a 100Mb/s switch port.C. This is an Ethernet port perating at half duplex. D. This is an Ethernet port operating at full duplex.E. This is a port on a ne

14、twork interface card in a PC.半双工模式会产生冲突，全双工模式不会产生冲突QUESTION 009A receiving host computes the checksum on a frame and determines that the frame is damaged.The frame is then discarded.At which OSI layer did this happen?收到一个主机发来的帧并进行校验以确认是否损坏，然后丢弃。这个过程在 OSI 哪一层发生？A. session B. network C. PhysicalD. dat

15、a linkE. Transport传输层：数据段，segment网络层：数据包，数据报，packet数据链路层：数据帧，frameQUESTION 010Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two.)以下那些正确描述了 OSI 数据封装的过程？A. The transport layer divides a data stream into segments and may add reliability and flow control

16、information.传输层将数据分段，并且加上可靠性和流控制信息。B. The data link layer adds physical source and destination addresses and an FCS to the segment.数据链路层会添加物理原和目的地址以及 FCS 校验字段，然后给数据段。C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related con

17、trol information.当网络层封装数据帧的时候，添加源和目的主机地址已经协议控制信息，形成数据包。D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.网络层添加三层地址和控制信息给数据段，从而形成数据包。E. The presentation layer translates bits into voltages for transmission across the physical link.表示层会将数据转换成电平给物

18、理链路传输。每一层只能接收来自上一层的数据并进行封装QUESTION 011Refer to the graphic.Host A is communicating with the seiver. What will be the source MAC address of the frames received by Host A from the server?参考以下图片，主机 A 和服务器之间的通信，主机 A 收到服务器发来的数据帧，那么原 MAC 地址会是什么？A. the MAC address of the seiver network interfaceB. the MAC

19、address of host AC. the MAC address of router interface e 1D. the MAC address of router interface e0QUESTION 012Refer to the exhibit.What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN?(choose two)如图所示，在一个以太网 VLAN 中，如果集线器用交换机代替，将会出现哪两个结

20、果？A. The number of collision domains would decrease. 冲突域将会减少B. The number of collision domains would increase.冲突域将会增加。C. The number of broadcast domains would remain the same.广播域不会改变D. The number of collision domains would remain the same.冲突域不会改变E. The number of broadcast domains would increase.广播域将

21、会增加。QUESTION 013Which three statements accurately describe layer 2 Ethernet switches?(choose three)下列哪三项准确的描述了二层以太网交换机？A. Microsegmentation decreases the number of collisions on the network.在网络中，网络分段减少了冲突的数量。B. if a switch receives a frame for an unkown destination,it uses ARP to resolve the address

22、.如果一个交换机接受到一个未知目的帧，他们使用 ARP 来决定这个地址。C. Spanning Tree Protocol allows switches to automatically share vlan information.生成树协议允许交换机自动分享 vlan 信息。D. In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding stat

23、e.All other switches in that broadcast domain will have only one root port.在一个具有冗余链路的交换网络中，会包含一个根桥，且每个端口都处于转发状态，在这个广播域中，其他交换机有且只有一个根端口。E. Establishing vlans increases the number of broadcast domains.创建 vlan 能够增大广播域数量。F. Switches that are configured with vlans make forwarding decisions based on both

24、layer 2 and layer 3 address information.交换机的 vlan 策略配置，是基于二层和三层地址。QUESTION 014Where does routing occur within the DoD TCP/IP reference model?在 DOD 的 TCP/IP 参考模型中，路由发生在哪一层？A. applicationB. internetC. network D. transportDoD 模型： 应用层（ Application） 主机到主机层（ Host to Host） 网络互连层（ Internet） 网络访问层（ Network A

25、ccess）OSI 模型： 物理层( Physical) 数据链路层( DataLink) 网络层( Network) 传输层( Transport) 会话层( Senssion) 表示层( Presentation) 应用层( Application)QUESTION 015Which destination addresses will be used by Host A to send data to Host C? (Choose two.)主机发送数据到主机，会使用哪个目的地址？A. the IP address of Switch 1B. the MAC address of Sw

26、itch 1C. the IP address of Host CD. the MAC address of Host CE. the IP address of the routers E0 interfaceF. the MAC address of the routers E0 interfaceQUESTION 016For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)使用武力地址的两个目的是什么？A. to uniquely identify devices at

27、Layer 2在 二层上识别设备。B. to allow communication with devices on a different network在不同的网络中允许通讯。C. to differentiate a Layer 2 frame from a Layer 3 packet区分来自三层的包和二层的帧。D. to establish a priority system to determine which device gets to transmit first创立一个优先级系统以便确定哪个设备可以优先传输。E. to allow communication between

28、 different devices on the same network同一个网络中允许不同的设备通讯。F. to allow detection of a remote device when its physical address is unknown当物理地址未知的时候，允许远端设备检测。QUESTION 017Refer to the exhibit. Based on the information given. Which switch will be elected root bridge and why?如图所示，以图示信息，哪个交换机将会被选举为根桥，为什么？A. Sw

29、itch A ,because it has the lowest MAC address交换机，因为它具有更低的地址。B. Switch C,because it has the lowest priority交换机，因为它具有更低的优先级。C. Switch B,because it has the highest MAC address交换机，因为它具有更高的地址。D. Switch C,because it is the most centrally located switch 交换机，因为它最处于交换机的中心。E. Switch A,because it is the most centrally located switch 交换机，因为它最处于交换机的中心。