Cisco_640-802翻译版(中英文对照)

Cisco 640-802

Cisco Certified Network Associate (CCNA)

1. What are two reasons that a network administrator would use access lists? (Choose two.) 1.出于哪两种理由，网络管理员会使用访问列表？ A. to control vty access into a router A.控制通过VTY访问路由器

B. to control broadcast traffic through a router B.控制广播流量穿越路由器

C. to filter traffic as it passes through a router

C.过滤穿越路由器的流量

D. to filter traffic that originates from the router 过滤源自路由器的流量

E. to replace passwords as a line of defense against security incursions 用来重置密码以防御攻击

Answer（回答，答案）: AC

2. A default Frame Relay WAN is classified as what type of physical network? 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-point A.点到点

B. broadcast multi-access B.广播多路访问

C. nonbroadcast multi-access C.非广播多路访问

D. nonbroadcast multipoint D.非广播多点

E. broadcast point-to-multipoint E.广播点到多点 Answer: C

3. A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at 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据时， 一些无线用户发现无线网络变得缓慢和出现丢包 A. mismatched TKIP encryption B. null SSID

C. cordless phones D. mismatched SSID E. metal file cabinets

F. antenna type or direction Answer: CEF

4. 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？

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A. one A.1

B. two

B.2

C. three C.3

D. four D.4 E. five E.5 F. six F.6

Answer: C

5. 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

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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 set

B. The network diagram represents an extended service set (ESS).

B. 网络描述了一个extended service set

C. 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 1

D. 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: BE

6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command?

6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast，以下选项正确的是？ A. This command should be executed from the global configuration mode. A.该命令应该在全局配置模式下被执行

B. The IP address 10.121.16.8 is the local router port used to forward data. B.IP地址10.121.16.8是本地路由器用来转发数据的接口 C. 102 is the remote DLCI that will receive the information. C.102是远端的DLCI它将接受信息。

D. This command is required for all Frame Relay configurations. D.这个命令要求被配置为所有的帧中继配置。

E. The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC. E.这个广播选项允许数据包，例如rip更新信息，将会被转发通过PVC. Answer: E

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7. Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server?

7.哪种类型的攻击的特点是发大量的TCP请求连接数据包到服务器？ A. denial of service A.拒绝服务

B. brute force B.强制叠加

C. reconnaissance C.监听

D. Trojan horse D.木马

Answer: A

8. Which of the following are associated with the application layer of the OSI model? (Choose

two.)

8.以下两个选项是工作在OSI模型的应用层的？ A. ping B. Telnet C. FTP D. TCP E. IP

Answer: BC

9. Refer to the exhibit. The network administrator has created a new VLAN on Switch1 and added host C and host D. The administrator has properly configured switch interfaces FastEthernet0/13 through FastEthernet0/24 to be members of the new VLAN. However, after the network

administrator completed the configuration, host A could communicate with host B, but host A could not communicate with host C or host D. Which commands are required to resolve this problem?

9.网络管理员在交换机1上创建一个新VLAN并且将主机C和主机D加入到此VLAN中.管理员 配置交换机接口FastEthernet0/13到FastEthernet0/24成为新VLAN成员.但是网络管理员完成 配置以后,主机A可以和主机B通信,但是主机A不能和主机C或者主机D通信. 哪个命令可以用来解决这个问题

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D. 172.1.4.0/24 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24

E. 172.1.4.0/25 172.1.4.128/25 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24 Answer: C

17. Which spread spectrum technology does the 802.11b standard define for operation? 17.哪种扩频技术是802.11B定义使用的

A. IR B. DSSS C. FHSS

D. DSSS and FHSS E. IR, FHSS, and DSSS Answer: B

18. Refer to the exhibit. Assume that all router interfaces are operational and correctly configured. In addition, assume that OSPF has been correctly configured on router R2. How will the default route configured on R1 affect the operation of R2?

18.根据下图，假设所有路由器接口都配置正确且正常工作，假设R2上OSPF配置正确，配置 在R1上默认路由会怎么影响R2的工作

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A. Any packet destined for a network that is not directly connected to router R1 will be dropped. A.任何到达一个和路由器R1非直连的网络的数据包都会被丢弃

B. Any packet destined for a network that is not directly connected to router R2 will be dropped immediately.

B.任何到达一个和路由器R2非直连的网络的数据包都会被丢弃

C. Any packet destined for a network that is not directly connected to router R2 will be dropped

immediately because of the lack of a gateway on R1.

C.任何到达一个和路由器R2非直连的网络的数据包都会即时被丢弃，因为R1上缺少网关

D. The networks directly connected to router R2 will not be able to communicate with the

172.16.100.0, 172.16.100.128, and 172.16.100.64 subnetworks.

D. 直连在 R2 上的网络将不能够和 172.16.100.0, 172.16.100.128, 172.16.100.64 这些子网通

讯

E. Any packet destined for a network that is not referenced in the routing table of router R2 will be directed to R1. R1 will then send that packet back to R2 and a routing loop will occur.

E.任何目的地没有在R2的路由表中的数据包,R2将会定向到R1,R1会发送哪个数据包到R2,这样路 由环路产生

Answer: E

19. A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port? 19.在一个共享的双绞线的网络上的接口上产生了冲突检测和载波侦听.通过这个描述,关于 这个网络接口你知道了什么

A. This is a 10 Mb/s switch port. A.这是一个10 Mb/s的交换端口 B. This is a 100 Mb/s switch port. B.这是一个100Mb/s 的交换端口

C. This is an Ethernet port operating at half duplex.

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C.这是一个工作在半双工模式下的以太口 D. This is an Ethernet port operating at full duplex. D.这是一个工作在全双工模式下的以太口

E. This is a port on a network interface card in a PC. E.这是一个PC机上网卡上的一个接口 Answer: C

20. Refer to the topology and router configuration shown in the graphic. A host on the LAN is accessing an FTP server across the Internet. Which of the following addresses could appear as a source address for the packets forwarded by the router to the destination server?

20.根据下图显示的拓扑结构和路由器配置，一个在该LAN上的主机正在通过INTERNET访 问一个FTP 服务器。下列地址中哪个可以作为路由器发送到该目的服务器的数据包的源地 址。

A. 10.10.0.1 B. 10.10.0.2 C. 199.99.9.33 D. 199.99.9.57 E. 200.2.2.17 F. 200.2.2.18 Answer: D

21. A company is installing IP phones. The phones and office computers connect to the same

device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device? (Choose two.) 21.一个公司正在安装IP 电话。电话和办公室电脑连接到同个设备上，为了保证电话数据的

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最大传输量，公司需要确定电话流量是和办公室电脑的数据流量不是在同一个网络上。以下 哪个是最好的网络设备，用来直连到电话和电脑，并且，哪种技术应该被配置在该设备上 A. hub B. router C. switch D. STP

E. subinterfaces F. VLAN Answer: CF

22. Refer to the exhibit. Which statement describes DLCI 17? 22.根据下图，那个选项描述了DLCI 17

A. DLCI 17 describes the ISDN circuit between R2 and R3. A.DLCI 17描述了R2和R3之间的ISDN线路

B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1. B.DLCI 17描述了一条在R2上的PVC，不能用在R3和R1上

C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3. C.DLCI 17 是R2使用的二层地址，用来描述一条到R3的PVC

D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider. D.DlDLCI17描述了一条从R2 R3到服务提供商拨号网络 Answer: C

23. Which routing protocol by default uses bandwidth and delay as metrics?

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23.哪个路由协议默认用带宽和延迟作为metrics值 A. RIP B. BGP C. OSPF D. EIGRP Answer: D

24. Refer to the output from the show running-config command in the exhibit. What should the administrator do to allow the workstations connected to the FastEthernet 0/0 interface to obtain an IP address?

24.根据下图中展示的show running-config命令的结果。网络管理员该如何做才能允许工作站 连接到FastEthernet 0/0接口去获得一个IP 地址

A. Apply access-group 14 to interface FastEthernet 0/0.

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A. TFTP server, Flash, NVRAM B. ROM, NVRAM, TFTP server C. NVRAM, TFTP server, ROM D. Flash, TFTP server, ROM E. Flash, NVRAM, ROM Answer: D

63. Refer to the output from the show running-config command in the exhibit. What should the administrator do to allow the workstations connected to the FastEthernet 0/0 interface to obtain an IP address?

63. 如图所示网络管理员应该怎么做才能使得工作在计算机连接到FastEthernet 0/0接口获取

IP地址？

A. Apply access-group 14 to interface FastEthernet 0/0. A. 在FastEthernet 0/0接口应用access-group 14。

B. Add access-list 14 permit any any to the access list configuration. B. ACL中添加access-list 14 permit any any

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C. Configure the IP address of the FastEtherent 0/0 interface to 10.90.201.1. C. 配置FastEtherent 0/0的IP地址为10.90.201.1.

D. Add an interface description to the FastEthernet 0/0 interface configuration. D. 给 FastEthernet 0/0 接口添加描述性语句. Answer: C

64. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

64.在哪种情况下，同一个单播帧被复制多个在LAN中传输? A. during high traffic periods A. 在流量达到高峰的时候

B. after broken links are re-established B. 在被破坏的链路重新恢复正常的时候。

C. when upper-layer protocols require high reliability C. 当上层的协议需要高可靠性时。

D. in an improperly implemented redundant topology D. 存在不正确的冗余链路。

E. when a dual ring topology is in use E. 在使用环形拓扑的时候。 Answer: D

65. Which of the following describe private IP addresses? (Choose two.) 65.下列哪些是对私有IP地址的描述？（two）

A. addresses chosen by a company to communicate with the Internet A. 公司使用的与互联网联通的地址。

B. addresses that cannot be routed through the public Internet B.在公网上不能被路由的地址。

C. addresses that can be routed through the public Internet C. 在公网上可以被路由的地址。

D. a scheme to conserve public addresses D. 节省公网地址使用的方案。

E. addresses licensed to enterprises or ISPs by an Internet registry organization E. 由一个互联网注册组织授权地址给企业或互联网服务供应商， Answer: BD

66. Refer to the exhibit. A network administrator is adding two new hosts to SwitchA. Which three values could be used for the configuration of these hosts? (Choose three.)

66.根据图示网络管理员在SwitchA上增加两台新主机，用下面那三个选项来配置这些主机？

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A. host 1 IP address: 192.168.1.79 A. host 1 IP 地址: 192.168.1.79

B. host 1 IP address: 192.168.1.64 B. host 1 IP 地址92.168.1.64

C. host 1 default gateway: 192.168.1.78 C. host 1 默认网关: 192.168.1.78

C. host 1 default gateway: 192.168.1.78 D. host 2 IP 地址192.168.1.128 D. host 2 IP address: 192.168.1.128 E. host 2 默认网关192.168.1.129

E. host 2 default gateway: 192.168.1.129 F. host 2 IP 地址192.168.1.190 F. host 2 IP address: 192.168.1.190 Answer: ACF

67. Which of the following statements are true regarding bridges and switches? (Choose 3.) 67.下列关于网桥和交换机的说法哪些是正确的? (Choose 3.)

A. Switches are primarily software based while bridges are hardware based. A. 交换机基于软件，网桥基于硬件。.

B. Both bridges and switches forward Layer 2 broadcasts. B. 网桥和交换机都转发二层广播。

C. Bridges are frequently faster than switches. C. 网桥比交换机速度快。

D. Switches have a higher number of ports than most bridges.. D. 交换机比网桥有更多的端口。

E. Bridges define broadcast domains while switches define collision domains. E. 网桥分割广播域，交换机分割冲突域。

F. Both bridges and switches make forwarding decisions based on Layer 2 addresses. F. 网桥和交换机都通过二层地址转发。 Answer: BDF

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68. Which of the following describes the roles of devices in a WAN? (Choose three.)

68.下列哪些选项正确描述了WAN设备的用途? (Choose three.) （不会整） A. CSU/DSU terminates a digital local loop.

A. CSU/DSU 防止数字本地环路。（注：本题库由56CTO.COM翻译小组原创,转载请注明出 处:bbs.56cto.com）

B. A modem terminates a digital local loop. B. modem防止数字本地环路.

C. A CSU/DSU terminates an analog local loop. C. A CSU/DSU终止一个模拟本地环路

D. A modem terminates an analog local loop. D.一个调制解调器终止一个模拟本地环路

E. A router is commonly considered a DTE device. E. 一台路由器通常是认为是一台DTE设备

F. A router is commonly considered a DCE device. F.一台路由器通常认为是一台DCE设备 Answer: ADE

69. A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network?

69. 如果一台路由器从多个源那里接收到192.168.10.0/24，那么最可信的路由条目是用什么

标准来判断的?

A. a directly connected interface with an address of 192.168.10.254/24 A. 一个直连接口的IP地址是192.168.10.254/24 B. a static route to network 192.168.10.0/24 B. 有去往192.168.10.0/24的静态路由。

C. a RIP update for network 192.168.10.0/24 C. 从192.168.10.0/24发来的RIP更新包。

D. an OSPF update for network 192.168.0.0/16 D. 从192.168.10.0/24发来的OSPF更新包

E. a default route with a next hop address of 192.168.10.1 E. 一个默认路由的下一跳的IP地址为192.168.10.1

F. a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop F. 一条静态路由为192.168.10.0/24且配置的本地接口为下一跳 Answer: A

70. Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three.)

70.与LAN相比WAN更喜欢哪种第二层封装? (Choose three.) A. HDLC

B. Ethernet C. Token Ring D. PPP E. FDDI

F. Frame Relay

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Answer: ADF

71. What can be determined from the router output shown in the graphic? 71．从下图的路由器输出可以确定什么？

A. 200.1.1.64 is a default route. A. 200.1.1.64 是默认路由。

B. The output shows that there are three default routes. B. 输出显示有三条默认路由。

C. The output came from router R2. C. 以上是R2的输出

D. The output came from a router that has four physical interfaces. D.以上输出是来自有四个物理接口的路由. E. EIGRP is in use in this network. E.在上图所示网络中使用了EIGRP Answer: E

72. Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?

72.哪个附加配置的步骤是必要的为了连接到 SSID 广播关闭的接入点? A. Set the SSID value in the client software to public. A.在客户软件设置 SSID 值公开

B. Configure open authentication on the AP and the client. B.在 AP 和客户配置开放认证

C. Set the SSID value on the client to the SSID configured on the AP.

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