CCNA考试题库中英文翻译版及答.pdf

《CCNA考试题库中英文翻译版及答.pdf》由会员分享，可在线阅读，更多相关《CCNA考试题库中英文翻译版及答.pdf（30页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、CCNA 考试题库中英文翻译版及答案11 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.bro

2、adcast 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 squar A few wireless users are experiencing slow performance and dro

3、ps while most users are o 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 Answ

4、er: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?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

5、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 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

6、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

7、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

8、.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

9、转发通过PVC.Answer:E 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

10、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 addedhost C and host D.The administrator has properly configured switch interfaces FastEtherne

11、t0/13 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

12、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A.Router(config)#interface fastethernet 0/1.3 Router(config-if)#encapsulation dot1q 3 Router(config-if)#ip address 192.168.3.1 255.255.255.0 B.Router(config)#router

13、 rip Router(config-router)#network 192.168.1.0 Router(config-router)#network 192.168.2.0 Router(config-router)#network 192.168.3.0 C.Switch1#vlan database Switch1(vlan)#vtp v2-mode Switch1(vlan)#vtp domain cisco Switch1(vlan)#vtp server D.Switch1(config)#interface fastethernet 0/1 Switch1(config-if)

14、#switchport mode trunk Switch1(config-if)#switchport trunk encapsulation isl Answer:A 10.For security reasons,the network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork.Which protocol should be blocked with access control lists?10.出于安全考虑，网络管理员需要去

15、防止外网主机PING内网，下面那个协议应该用access control lists 限制掉A.IP B.ICMP C.TCP D.UDP Answer:B 11.What are two recommended ways of protecting network device configuration files from outside network security threats?(Choose two.)11.哪两种方法被推荐用来保守网络设备的配置文件不受外网的威胁A.Allow unrestricted access to the console or VTY ports.A

16、.允许 unrestricted 访问到 console 或 VTY口B.Use a firewall to restrict access from the outside to the network devices.B.用防火墙去限制外网的网络设备访问C.Always use Telnet to access the device command line because its data is automatically encrypted.C.因为数据被自动加密，所以总是允许使用TELNET 命令访问网络设备的命令行，D.Use SSH or another encrypted an

17、d authenticated transport to access device configurations.D.使用 SSH或其他加密、认证机制去访问设备的配置E.Prevent the loss of passwords by disabling password encryption.E.为了避免丢失密码，所以不对密码进行加密(明文)Answer:BD 12.Refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the outbound dire

18、ction.Which two packets,if routed to the interface,will be denied?(Choose two.)12.根据下图，该 access list被配置在路由器RTB的 S0/0接口上的 OUT方向，哪两个数据包会被DENY，如果被路由到该接口上的话?access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnet access-list 101 permit ip any any A.source ip address:192.168.15.5;destination port:2

19、1 B.source ip address:,192.168.15.37 destination port:21 C.source ip address:,192.168.15.41 destination port:21 D.source ip address:,192.168.15.36 destination port:23 E.source ip address:192.168.15.46;destination port:23 F.source ip address:,192.168.15.49 destination port:23 Answer:DE 13.What are tw

20、o security appliances that can be installed in a network?(Choose two.)13.以下哪两个安全工具能被安装在一个网络里A.ATM B.IDS C.IOS D.IOX E.IPS F.SDM Answer:BE 14.Refer to the exhibit.Switch1 has just been restarted and has passed the POST routine.Host A sends its initial frame to Host C.What is the first thing the switc

21、h will do as regards populating the switching table?14.根据下图，Switch1 刚刚完成重启，并完成上电自检。Host A发送它的第一个侦到Host C，交换机首先会对switching table做什么操作A.Switch1 will add 192.168.23.4 to the switching table.A.Switch1 会添加 192.168.23.4 到 switching table.B.Switch1 will add 192.168.23.12 to the switching table.B.Switch1 添加

22、 192.168.23.12到 switching table.C.Switch1 will add 000A.8A47.E612 to the switching table.C.Switch1添加 000A.8A47.E612 到 switching table.D.Switch1 will add 000B.DB95.2EE9 to the switching table.D.Switch1 添加 000B.DB95.2EE9 到 switching table.Answer:C 15.The user of Host1 wants to ping the DSL modem/route

23、r at 192.168.1.254.Based on the Host1 ARP table that is shown in the exhibit,what will Host1 do?15.Host1 的用户想 PING DSL调制解调器/路由器的 192.168.1.254，ARP表如下图，Host1会怎么操作?A.send a unicast ARP packet to the DSL modem/router A.发送一个单播ARP包到 DSL调制解调器/路由器B.send unicast ICMP packets to the DSL modem/router B.发送一个单播

24、ICMP包到 DSL调制解调器/路由器C.send Layer 3 broadcast packets to which the DSL modem/router responds C.发送三层广播包到响应的DSL调制解调器/路由器D.send a Layer 2 broadcast that is received by Host2,the switch,and the DSL modem/router D.发送一个可以被Host2,the switch,and the DSL modem/router 受到的 2层广播帧Answer:B 16.Refer to the exhibit.Wh

25、at is the most efficient summarization that R1 can use to advertise its networks to R2?16.根据下图，R1 能通告给 R2的最有效的汇总是?A.172.1.0.0/22 B.172.1.0.0/21 C.172.1.4.0/22 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

26、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 cor

27、rectly 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 pac

28、ket 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

29、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 routi

30、ng 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

31、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.C.这是一个工作在半双工模式下的以太口D.This i

32、s 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 followi

33、ng 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

34、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

35、 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

36、.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 u

37、sed 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?23.哪个路由协议默认用带宽和延迟作为metrics值A.RIP B.

38、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

39、/0接口去获得一个IP 地址A.Apply access-group 14 to interface FastEthernet 0/0.A.在接口 FastEthernet 0/0应用 access-group 14 B.Add access-list 14 permit any any to the access list configuration.B.在 access-list 14中添加 access-list 14 permit any any C.Configure the IP address of the FastEtherent 0/0 interface to.10.90.

40、201.1 C.配置 FastEtherent 0/0接口的 IP 地址为 10.90.201.1 D.Add an interface description to the FastEthernet 0/0 interface configuration.D.为接口 FastEthernet 0/0添加一个接口描述Answer:C 25.Refer to the exhibit.The networks connected to router R2 have been summarized as a 192.168.176.0/21 route and sent to R1.Which tw

41、o packet destination addresses will R1 forward to R2?(Choose two.)25.根据下图，网络连接到路由器R2被汇总为一条 192.168.176.0/21的路由，并发给R1。哪两个数据包目的地址R1 会转发给R2 A.192.168.194.160 B.192.168.183.41 C.192.168.159.2 D.192.168.183.255 E.192.168.179.4 F.192.168.184.45 Answer:BE 26.Two routers named Atlanta and Brevard are connec

42、ted by their serial interfaces as shown in the exhibit,but there is no data connectivity between them.The Atlanta router is known to have a correct configuration.Given the partial configurations shown in the exhibit,what is the problem on the Brevard router that is causing the lack of connectivity?2

43、6.如下图，两个路由器(Atlanta 和 Brevard)用串口连接起来。但是他们之间没有数据传输，已知Atlanta配置正确，下图给出部分配置，路由器Brevard上导致该问题的原因是A.A loopback is not set.A.没有设置 loopback 命令B.The IP address is incorrect.B.IP 地址不正确C.The subnet mask is incorrect.C.子网掩码不正确D.The serial line encapsulations are incompatible.D.串行链路封装不正确E.The maximum transmiss

44、ion unit(MTU)size is too large.E.最大传输单元(MTU)设置得太大F.The bandwidth setting is incompatible with the connected interface.F.带宽设置和直连的接口不匹配Answer:B 27.Refer to the exhibit.Which switch provides the spanning-tree designated port role for the network segment that services the printers?27.根据下图，哪个交换机为打印机提供了生成

45、树中的指定端口角色?A.Switch1 B.Switch2 C.Switch3 D.Switch4 Answer:C 28.Refer to the exhibit.Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4.What will do with this data?28.根据下图，Switch-1 需要往一台MAC 地址为 00b0.d056.efa4的主机发数据，Switch-1 会如何处理这些数据?A.Switch-1 will drop the data because it doe

46、s not have an entry for that MAC address.A.Switch-1会丢弃该数据，因为它没有该MAC 地址条目B.Switch-1 will flood the data out all of its ports except the port from which the data originated.B.Switch-1会防洪该数据到所有的接口，除了该数据的源接口C.Switch-1 will send an ARP request out all its ports except the port from which the data origina

47、ted.C.Switch-1 会发送 ARP请求到所有的接口，除了该数据的源接口D.Switch-1 will forward the data to its default gateway.D.Switch-1 会往默认网关发送该数据Answer:B 29.In the implementation of VLSM techniques on a network using a single Class C IP address,which subnet mask is the most efficient for point-to-point serial links?29.在使用 VLS

48、M技术的网络中使用一个C类的 IP 地址，以下哪个子网掩码在点对点串行链路中是最不浪费地址空间的?A.255.255.255.0 B.255.255.255.240 C.255.255.255.248 D.255.255.255.252 E.255.255.255.254 Answer:D 30.Refer to the exhibit.Why would the network administrator configure RA in this manner?30.根据下图，网络管理员如此配置的RA的原因是?A.to give students access to the Internet

49、 A.让 students访问 Internet B.to prevent students from accessing the command prompt of RA B.阻止 students访问 RA的命令提示符C.to prevent administrators from accessing the console of RA C.阻止管理员访问RA的控制台D.to give administrators access to the Internet D.让 administrators访问 Internet E.to prevent students from accessin

50、g the Internet E.阻止 students访问 Internet F.to prevent students from accessing the network F.阻止 students 访问 Admin 的网络Answer:B 31.Which two values are used by Spanning Tree Protocol to elect a root bridge?(Choose two.)31.那两个值被生成树协议用来选举根桥A.amount of RAM B.bridge priority C.IOS version D.IP address E.MAC