CCNA考试题库中英文翻译版及答案Word格式文档下载.docx

CCNA考试题库中英文翻译版及答案Word格式文档下载.docx

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B・broadcastmulti-access

B.L播多路访问

C・nonbroadcastmulti-access

c.非广播多路访问

D・nonbroadcastmultipoint

D.非广播多点

E・broadcastpoint-to-multipoint

E.广播点到多点

Answer:

C

3・Asingle802・llgaccesspointhasbeenconfiguredandinstalledinthecenterofasquarAfewwirelessusersareexperiencingslowperformanceanddropswhilemostusersareoatpeakefficiency・Whatarethreelikelycausesofthisproblem?

（Choosethree・）

3.—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.mismatchedTRIPencryption

B.nullSSID

C・cordlessphones

D.mismatchedSSID

E・metalfilecabinets

F・antennatypeordirection

CEF4.Refertotheexhibit.Howmanybroadcastdomainsexistintheexhibitedtopology?

根据下图，图中的拓扑中存在多少个广播域?

VLANVLAN1VLAN30VLAN40

trunk

A.one

A.1

B.two

B.2

C.three

C.

D.four

D.4

E.five

E.5

F・six

F.6

5.Refertotheexhibit.WhattwofactscanbedeterminedfromtheWLANdiagram?

5•根据下图，WLANdiagram决定了哪两个事实

A.Theareaofoverlapofthetwocellsrepresentsabasicserviceset（BSS）.

A.两个cells的overlap的区域描述了一个basicserviceset

B.Thenetworkdiagramrepresentsanextendedserviceset（ESS）.

B.网络描述了一个extendedserviceset

C.Accesspointsineachcellmustbeconfiguredtousechannel1.

C.再每个CELL中的AP必须被配置成使用channel1

D.Theareaofoverlapmustbelessthan10%oftheareatoensureconnectivity.

D.为了确保连通性，重叠区域必须小于10%

E.ThetwoAPsshouldbeconfiguredtooperateondifferentchannels.

E.两个访问点应该被配置成工作在不同的频道

BE

6.Thecommandframe-relaymapip10.121.16.8102broadcastwasenteredontherouter.Whichofthefollowingstatementsistrueconcerningthiscommand?

6.路由器上输入命令frame-relaymapip10.121.16.8102broadcast，以下选项正确的是

A.Thiscommandshouldbeexecutedfromtheglobalconfigurationmode.

A.该命令应该在全局配置模式下被执行

B.TheIPaddress10.121.16.8isthelocalrouterportusedtoforwarddata.

B.IP地址10.121.16.8是本地路由器用来转发数据的接口

C.102istheremoteDLCIthatwillreceivetheinformation.

C.102是远端的DLCI它将接受信息。

D.ThiscommandisrequiredforallFrameRelayconfigurations.

D.这个命令要求被配置为所有的帧中继配置。

E.Thebroadcastoptionallowspackets,suchasRIPupdates,tobeforwardedacrossthePVC.

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.

E

7.WhichtypeofattackischaracterizedbyafloodofpacketsthatarerequestingaTCPconnection

toaserver?

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.denialofserviceA.拒绝服务

B.bruteforceB.强制叠加

C.reconnaissanceC.监听

D.TrojanhorseD.木马

A

8.WhichofthefollowingareassociatedwiththeapplicationlayeroftheOSImodel?

（Choose

two.）

8.以下两个选项是工作在OSI模型的应用层的？

A.pingB.Telnet

C.FTPD.TCPE.IP

BC

9.Refertotheexhibit.ThenetworkadministratorhascreatedanewVLANonSwitch1andaddedhostCandhostD.TheadministratorhasproperlyconfiguredswitchinterfacesFastEthernetO/13

throughFastEthernetO/24tobemembersofthenewVLAN.However,afterthenetworkadministratorcompletedtheconfiguration,hostAcouldcommunicatewithhostB,buthostAcouldnotcommunicatewithhostCorhostD.Whichcommandsarerequiredtoresolvethisproblem?

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FastEthernetO/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

sshe*叩

C192460J,<

Jis<

k^c脚cufMi«

Ll«

dtoFi04.!

Fa0/1

192.168.1.2/2

FaO/14

VLAN2

Switchl

LAN3

C192.168.2,0124■ckecttyc<

M）n«

ci*dtoF^O/1,2

Fa0/3/\Fa0Z13

192.168.Z15/24192.168.2J5/24192,168.3.15/24192.168.3.16/24

A.Router（config）#interfacefastethernet0/1.3

Router（config-if）#encapsulationdot1q3

Router（config-if）#ipaddress192.168.3.1255.255.255.0

B.Router（config）#routerrip

Router（config-router）#network192.168.1.0

Router（config-router）#network192.168.2.0

Router（config-router）#network192.168.3.0

C.Switch1#vlandatabase

Switch1（vlan）#vtpv2-mode

Switch1（vlan）#vtpdomaincisco

Switch1（vlan）#vtpserver

D.Switch1（config）#interfacefastethernet0/1

Switch1（config-if）#switchportmodetrunk

Switch1（config-if）#switchporttrunkencapsulationisl

10.Forsecurityreasons,thenetworkadministratorneedstopreventpingsintothecorporatenetworksfromhostsoutsidetheinternetwork.Whichprotocolshouldbeblockedwithaccesscontrollists?

10.出于安全考虑，网络管理员需要去防止外网主机PING内网，下面那个协议应该用accesscontrol

lists限制掉

A.

C.TCP

D.UDP

IPB.ICMP

B

11.Whataretworecommendedwaysofprotectingnetworkdeviceconfigurationfilesfromoutsidenetwork