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ID:55269086
大小:1.96 MB
页数:68页
时间:2020-05-08
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1、CCNA640-802V13题库试题分析题库讲解:吴老师(艾迪飞CCIE实验室首发:bbs.edify..1.Whataretworeasonsthatanetworkadministratorwoulduseaccesslists?(Choosetwo.)A.tocontrolvtyaccessintoarouterB.tocontrolbroadcasttrafficthrougharouterC.tofiltertrafficasitpassesthrougharouterD.tofiltertrafficthatoriginatesfromth
2、erouterE.toreplacepasswordsasalineofdefenseagainstsecurityincursionsAnswer:AC解释一下:在VTY线路下应用ACL,可以控制从VTY线路进来的telnet的流量。也可以过滤穿越一台路由器的流量。2.AdefaultFrameRelayWANisclassifiedaswhattypeofphysicalnetwork?A.point-to-pointB.broadcastmulti-accessC.nonbroadcastmulti-accessD.nonbroadcastmul
3、tipointE.broadcastpoint-to-multipointAnswer:C解释一下:在默认的情况下,帧中继为非广播多路访问链路。但是也可以通过子接口来修改他的网络的类型。3.Refertotheexhibit.Howmanybroadcastdomainsexistintheexhibitedtopology?A.oneB.twoC.threeD.fourE.fiveF.sixAnswer:C解释一下:广播域的问题,在默认的情况下,每个交换机是不能隔离广播域的,所以在同一个区域的所有交换机都在同一个广播域中,但是为了减少广播的危害,将广
4、播限制在一个更小的围,有了VLAN的概念,VLAN表示的是一个虚拟的局域网,而他的作用就是隔离广播。所以被VLAN隔离了的每个区域都表示一个单独的广播域,这样一个VLAN中的广播的流量是不能传到其他的区域的,所以在上题中就有3个广播域了。4.Asingle802.11gaccesspointhasbeenconfiguredandinstalledinthecenterofasquareoffice.Afewwirelessusersareexperiencingslowperformanceanddropswhilemostusersareopera
5、tingatpeakefficiency.Whatarethreelikelycausesofthisproblem?(Choosethree.)A.mismatchedTKIPencryptionB.nullSSIDC.cordlessphonesD.mismatchedSSIDE.metalfilecabinetsF.antennatypeordirectionAnswer:CEF6.Thecommandframe-relaymapip10.121.16.8102broadcastwasenteredontherouter.Whichofthefo
6、llowingstatementsistrueconcerningthiscommand?A.Thiscommandshouldbeexecutedfromtheglobalconfigurationmode.B.TheIPaddress10.121.16.8isthelocalrouterportusedtoforwarddata.C.102istheremoteDLCIthatwillreceivetheinformation.D.ThiscommandisrequiredforallFrameRelayconfigurations.E.Thebr
7、oadcastoptionallowspackets,suchasRIPupdates,tobeforwardedacrossthePVC.Answer:E解释一下:关于命令frame-relaymapip10.121.16.8102broadcast,这个命令用于手工静态添加一条映射,到达10.121.16.8的流量封装一个DLCI号为102,而且这条PVC是支持广播的流量的,比如RIP的更新包。因为在默认的情况下,帧中继的网络为非广播的,而RIP在其上是无法发包的。8.Whichofthefollowingareassociatedwiththea
8、pplicationlayeroftheOSImodel?(Choosetwo.)A.ping
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