CCNA考试题库中英文翻译版及答案.docx
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CCNA考试题库中英文翻译版及答案
CCNA考试题库中英文翻译版及答案
CCNA考试题库中英文翻译版及答案1[1]
1.Whataretworeasonsthatanetworkadministratorwoulduseaccesslists?
（Choosetwo.）
1.出于哪两种理由，网络管理员会使用访问列表？
A.tocontrolvtyaccessintoarouter
A.控制通过VTY访问路由器
B・tocontrolbroadcasttrafficthrougharouter
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・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
Answer:
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
Answer:
C
5.Refertotheexhibit.WhattwofactscanbedeterminedfromtheWLANdiagram?
（Choosetwo.）
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
Answer:
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.
Answer:
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
Answer:
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
Answer:
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,Fa0/1
Fa0/1
192.168.1.2/2
FaO/14
VLAN2
Switchl
LAN3
C192.168.2,0124■ckecttyc
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
Answer:
A
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
Answer:
B
11.Whataretworecommendedwaysofprotectingnetworkdeviceconfigurationfilesfromoutsidenetwork
升级会员 