CCNA考試題庫中英文翻譯版及標準答案

1、CCNA考試題庫中英文翻譯版及答案作者:日期:CCNA試題庫中英文翻譯版及答案111. Whataretworeasonsthatanetworkadministratorwoulduseaccesslists?(Choosetwo.)1 .出于哪兩種理由，網(wǎng)絡(luò)管理員會使用訪問列表？A. tocontrolvtyaccessintoarouterA.控制通過VTY訪問路由器B. tocontrolbroadcasttrafficthrougharouterB.控制廣播流量穿越路由器2. 一個默認的幀中繼WANt分類為哪種物理網(wǎng)絡(luò)類型？A. point-to-pointA.點到點B. broad

2、castmulti-accessB.廣播多路訪問C. nonbroadcastmulti-accessC.非廣播多路訪問D. nonbroadcastmultipointD.非廣播多點E. broadcastpoint-to-multipointE.廣播點到多點Answer:C3. Asingle802.11gaccesspointhasbeenconfiguredandinstalledinthecenterofasquarAfewwirelessusersareexperiencingslowperformanceanddropswhilemostusersareoatpeakeffici

3、ency.Whatarethreelikelycausesofthisproblem?(Choosethree.)3.一個802.11接入點被部署在一個方形辦公室的中央，當大多數(shù)用戶在大流量傳輸數(shù)一些無線用戶發(fā)現(xiàn)無線網(wǎng)絡(luò)變得緩慢和出現(xiàn)丟包A. mismatchedTKIPencryptionB. nullSSIDC. cordlessphonesD. mismatchedSSIDE. metalfilecabinetsF. antennatypeordirectionAnswer:CEF4. Refertotheexhibit.Howmanybroadcastdomainsexistinthe

4、exhibitedtopology?根據(jù)下圖,圖中的拓撲中存在多少個廣播域A. oneA.1B. twoB.2C. threeC.3D. fourD.4E. fiveE.5F. sixF.6Answer:C5. Refertotheexhibit.WhattwofactscanbedeterminedfromtheWLANdiagram?(Choosetwo.)5.根據(jù)下圖，WLANdiagram決定了哪兩個事實A. Theareaofoverlapofthetwocellsrepresentsabasicserviceset(BSS).A.兩個cells的overlap的區(qū)域描述了個basi

5、cservicesetB. Thenetworkdiagramrepresentsanextendedserviceset(ESS).B.網(wǎng)絡(luò)描述了一個extendedservicesetC. Accesspointsineachcellmustbeconfiguredtousechannel1.C.再每個CELL中的AP必須被配置成使用channel1D. Theareaofoverlapmustbelessthan10%oftheareatoensureconnectivity.D.為了確保連通性，重疊區(qū)域必須小于10%E. ThetwoAPsshouldbeconfiguredtoope

6、rateondifferentchannels.E.兩個訪問點應(yīng)該被配置成工作在不同的頻道Answer:BE6. Thecommandframe-relaymapip102broadcastwasenteredontherouter.Whichofthefollowingstatementsistrueconcerningthiscommand?6.路由器上輸入命令frame-relaymapip102broadcast,以下選項正確的是A. Thiscommandshouldbeexecutedfromtheglobalconfigurationm

7、ode.A.該命令應(yīng)該在全局配置模式下被執(zhí)行B. TheIPaddressisthelocalrouterportusedtoforwarddata.B.IP地址是本地路由器用來轉(zhuǎn)發(fā)數(shù)據(jù)的接口C. 102istheremoteDLCIthatwillreceivetheinformation.C.102是遠端的DLCI它將接受信息。D. ThiscommandisrequiredforallFrameRelayconfigurations.D.這個命令要求被配置為所有的幀中繼配置。E. Thebroadcastoptionallowspackets,

8、suchasRIPupdates,tobeforwardedacrossthePVC.E.這個廣播選項允許數(shù)據(jù)包，例如rip更新信息，將會被轉(zhuǎn)發(fā)通過PVC.Answer:E7. WhichtypeofattackischaracterizedbyafloodofpacketsthatarerequestingaTCPconnectiontoaserver?7.哪種類型的攻擊的特點是發(fā)大量的TCP請求連接數(shù)據(jù)包到服務(wù)器？A. denialofserviceA.拒絕服務(wù)B. bruteforceB.強制疊加C. reconnaissanceC.監(jiān)聽D. TrojanhorseD.木馬Answer:

9、Alayer of the OSI model? (Choose8.Whichofthefollowingareassociatedwiththeapplicationtwo.)8.以下兩個選項是工作在OSI模型的應(yīng)用層的？A.pingB.TelnetC.FTPD.TCPE.IPAnswer:BC9.Refertotheexhibit.ThenetworkadministratorhascreatedanewVLANonSwitch1andaddedhostCandhostD.TheadministratorhasproperlyconfiguredswitchinterfacesFastEt

10、hernet0/13throughFastEthernet0/24tobemembersofthenewVLAN.However,afterthenetworkadministratorcompletedtheconfiguration,hostAcouldcommunicatewithhostB,buthostAcouldnotcommunicatewithhostCorhostD.Whichcommandsarerequiredtoresolvethisproblem?9.網(wǎng)絡(luò)管理員在交換機1上創(chuàng)建一個新VLAN且將主機C和主機D加入到此VLAN中.管理員配置交換機接口FastEthern

11、et0/13至UFastEthernet0/24成為新VLAN成員.但是網(wǎng)絡(luò)管理員完成配置以后，主機A可以和主機B通信，但是主機A不能和主機C或者主機D通信.哪個命令可以用來解決這個問題1$2 165,1.2/2FaG/1七FaO/14Pri'Fte-isip-6中/離中用：8>Cm/Isdwacllyc<wnwct«dtoFaO11C192.16BX9Wl«dtrectlyconnacMtoFaWIJFaO/1SwitehlVLANr/FM/總?？?V仙135/24192,168.2.15/245/241&am

12、p;2.168.11J24A. Router(config)#interfacefastethernet0/1.3Router(config-if)#encapsulationdotlq3Router(config-if)#ipaddressB. Router(config)#routerripRouter(config-router)#networkRouter(config-router)#networkRouter(config-router)#networkC. Switc

13、h1#vlandatabaseSwitch1(vlan)#vtpv2-modeSwitch1(vlan)#vtpdomainciscoSwitch1(vlan)#vtpserverD. Switch1(config)#interfacefastethernet0/1Switch1(config-if)#switchportmodetrunkSwitch1(config-if)#switchporttrunkencapsulationislAnswer:A10.Forsecurityreasons,thenetworkadministratorneedstopreventpingsintothe

14、corporatenetworksfromhostsoutsidetheinternetwork.Whichprotocolshouldbeblockedwithaccesscontrollists?10.出于安全考慮，網(wǎng)絡(luò)管理員需要去防止外網(wǎng)主機PING內(nèi)網(wǎng)，下面那個協(xié)議應(yīng)該用accesscontrollists限制掉A.IPB.ICMPC.TCPD.UDPAnswer:B11. Whataretworecommendedwaysofprotectingnetworkdeviceconfigurationfilesfromoutsidenetworksecuritythreats?(Choo

15、setwo.)11.哪兩種方法被推薦用來保守網(wǎng)絡(luò)設(shè)備的配置文件不受外網(wǎng)的威脅A. AllowunrestrictedaccesstotheconsoleorVTYports.A.允許unrestricted訪問至Uconsole或VTY口B. Useafirewalltorestrictaccessfromtheoutsidetothenetworkdevices.B.用防火墻去限制外網(wǎng)的網(wǎng)絡(luò)設(shè)備訪問C. AlwaysuseTelnettoaccessthedevicecommandlinebecauseitsdataisautomaticallyencrypted.C.因為數(shù)據(jù)被自動加密,所

16、以總是允許使用TELNE偷令訪問網(wǎng)絡(luò)設(shè)備的命令行，D. UseSSHoranotherencryptedandauthenticatedtransporttoaccessdeviceconfigurations.D.使用SSH或其他加密、認證機制去訪問設(shè)備的配置E. Preventthelossofpasswordsbydisablingpasswordencryption.E.為了避免丟失密碼，所以不對密碼進行加密(明文)Answer:BD12.Refertotheexhibit.TheaccesslisthasbeenconfiguredontheS0/0interfaceofrouter

17、RTBintheoutbounddirection.Whichtwopackets,ifroutedtotheinterface,willbedenied?(Choosetwo.)12.根據(jù)下圖，該accesslist被配置在路由器RTB的S0/0接口上的OUTtT向，哪兩個數(shù)據(jù)包會被DENY如果被路由到該接口上的話？192限1530192.1胤15530TelnetSerwraccess-list101denytcp5anyeqtelnetaccess-list101permitipanyanyA.sourceipaddress:192.168.15.

18、5;destinationport:21B. sourceipaddress:,7destinationport:21C. sourceipaddress:,1destinationport:21D. sourceipaddress:,6destinationport:23E. sourceipaddress:6;destinationport:23F. sourceipaddress:,9destinationport:23Answer:DE13 .Whataretwose

19、curityappliancesthatcanbeinstalledinanetwork?(Choosetwo.)14 .以下哪兩個安全工具能被安裝在一個網(wǎng)絡(luò)里A.ATMB.IDSC.IOSD.IOXE.IPSF.SDMAnswer:BE14. Refertotheexhibit.Switch1hasjustbeenrestartedandhaspassedthePOSTroutine.HostAsendsitsinitialframetoHostC.Whatisthefirstthingtheswitchwilldoasregardspopulatingtheswitchingtable?1

20、4.根據(jù)下圖，Switch1剛剛完成重啟，并完成上電自檢。HostA發(fā)送它的第一個偵到HostC交換機首先會對switchingtable做什么操作一Host AMAC -OOOA.8A47.E612IP-192J&8,23.4HostCHO$tDIP -192,158.23.12A.Switch1willaddtotheswitchingtable.A. Switch1會添力口到switchingtable.B. Switch1willadd2totheswitchingtable.B.Switch1添力口192

21、.168.23.12至Uswitchingtable.C.Switch1willadd000A.8A47.E612totheswitchingtable.C. Switch1添加000A.8A47.E612到switchingtable.D. Switch1willadd000B.DB95.2EE9totheswitchingtable.D.Switchl添力口000B.DB95.2EE9至Uswitchingtable.Answer:C15. TheuserofHost1wantstopingtheDSLmodem/routerat54.BasedontheHost1A

22、RPtablethatisshownintheexhibit,whatwillHost1do?16. Host1的用戶想PINGDSL調(diào)制解調(diào)器/路由器的54,ARP表如下圖，Host1會怎么操作？體支C -aril-a【曲曲"以做,195-0瑯I(yè)iiteme!AddressPh爐calAddressType第12M00刷M禽14函HywdcA. sendaunicastARPpackettotheDSLmodem/routerA.發(fā)送一個單播ARP包到DSL調(diào)制解調(diào)器/路由器B. sendunicastICMPpacketstotheDSLmodem/rout

23、erB.發(fā)送一個單播ICMP包到DSL調(diào)制解調(diào)器/路由器C. sendLayer3broadcastpacketstowhichtheDSLmodem/routerrespondsC.發(fā)送三層廣播包到響應(yīng)的DSL調(diào)制解調(diào)器/路由器D. sendaLayer2broadcastthatisreceivedbyHost2,theswitch,andtheDSLmodem/routerD.發(fā)送一個可以被Host2,theswitch,andtheDSLmodem/router受到的2層廣播幀Answer:B16. Refertotheexhibit.Whatisthemostefficientsum

24、marizationthatR1canusetoadvertiseitsnetworkstoR2?16.根據(jù)下圖，R1能通告給R2的最有效的匯總是？172.1412卻25 1迄工蛀空17217324A. /22C. /22D. /24/24E. /25/24/24B./21/24/2428/25/24Answer:C17. Whichspreadspectrumtechnology

25、doesthe802.11bstandarddefineforoperation?17.哪種擴頻技術(shù)是802.11B定義使用的A.IRB.DSSSC.FHSSD.DSSSandFHSSE.IR,FHSS,andDSSSAnswer:B18. Refertotheexhibit.Assumethatallrouterinterfacesareoperationalandcorrectlyconfigured.Inaddition,assumethatOSPFhasbeencorrectlyconfiguredonrouterR2.Howwillthedefaultrouteconfiguredo

26、nR1affecttheoperationofR2?18.根據(jù)下圖，假設(shè)所有路由器接口都配置正確且正常工作，假設(shè)R2±OSPFffi置正確，配置在R1上默認路由會怎么影響R2的工作RIRoutingCommands:iproute0.0.0nd(XQQ。/eriaffEimrteiospf117Z16,mZ6network172.16100.00.0L0Jareii0network172J6100-640UD.0L63aioaDMt則胖V2d&100,12800,31耨"Qdefautinform油4flvrigiiierleA. Anypacketdestined

27、foranetworkthatisnotdirectlyconnectedtorouterR1willbedropped.A.任何到達一個和路由器R1非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會被丟棄B. AnypacketdestinedforanetworkthatisnotdirectlyconnectedtorouterR2willbedroppedimmediately.B.任何到達一個和路由器R2非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會被丟棄C. AnypacketdestinedforanetworkthatisnotdirectlyconnectedtorouterR2willbedroppedimmediate

28、lybecauseofthelackofagatewayonR1.C.任何到達一個和路由器R2非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會即時被丟棄，因為R1上缺少網(wǎng)關(guān)D. ThenetworksdirectlyconnectedtorouterR2willnotbeabletocommunicatewiththe,28,and4subnetworks.D.直連在R2上的網(wǎng)絡(luò)將不能夠和,28,4這些子網(wǎng)通訊E. Anypacketdestinedforanetworkth

29、atisnotreferencedintheroutingtableofrouterR2willbedirectedtoR1.R1willthensendthatpacketbacktoR2andaroutingloopwilloccur.E.任何目的地沒有在R20勺路由表中的數(shù)據(jù)包，R2將會定向到R1,R1會發(fā)送哪個數(shù)據(jù)包到R2,這樣路由環(huán)路產(chǎn)生Answer:E19.Anetworkinterfaceporthascollisiondetectionandcarriersensingenabledonasharedtwistedpairnetwork.Fromthisstatement,wh

30、atisknownaboutthenetworkinterfaceport?19.在一個共享的雙絞線的網(wǎng)絡(luò)上的接口上產(chǎn)生了沖突檢測和載波偵聽.通過這個描述，關(guān)于這個網(wǎng)絡(luò)接口你知道了什么A. Thisisa10Mb/sswitchport.A.這是一個10Mb/s的交換端口B. Thisisa100Mb/sswitchport.B.這是一個100Mb/s的交換端口C. This is an Ethernet port operating at half duplex.C.這是一個工作在半雙工模式下的以太口D. This is an Ethernet port operating at full

31、duplex.D.這是一個工作在全雙工模式下的以太口E. This is a port on a network interface card in a PC.E.這是一個PC機上網(wǎng)卡上的一個接口Answer: C20. 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 sou

32、rce address for the packets forwarded by the router to the destination server?20.根據(jù)下圖顯示的拓撲結(jié)構(gòu)和路由器配置，一個在該LAN上的主機正在通過INTERNE昉問一個FTP服務(wù)器。下列地址中哪個可以作為路由器發(fā)送到該目的服務(wù)器的數(shù)據(jù)包的源地interface SwtivHIp nst outsideIrteilace FastEMwrnetOip 才的科a 10,10.0.1 25f.2e5-255,0ip rat nsidtSI: 200.2 2.1&30FaO: 10,10.0.1/24手 Mt p

33、a制 ttlt 199.99 9.40 109.99J9.62 nrtltk 2M26GJSE.224 ip rm in則 d 尊 source II«11 ped testip route O.OD OO.QJO 0 200.2217 f1 pt rm It 1C.1Q,0?？诳?口？的A. B. RilO-likOOC. 3D. 7E. 7F. 8Answer:D21. AcompanyisinstallingIPphones.Thephonesandofficecom

34、putersconnecttothesamedevice.Toensuremaximumthroughputforthephonedata,thecompanyneedstomakesurethatthephonetrafficisonadifferentnetworkfromthatoftheofficecomputerdatatraffic.Whatisthebestnetworkdevicetowhichtodirectlyconnectthephonesandcomputers,andwhattechnologyshouldbeimplementedonthisdevice?(Choo

35、setwo.)21.一個公司正在安裝IP電話。電話和辦公室電腦連接到同個設(shè)備上，為了保證電話數(shù)據(jù)的最大傳輸量，公司需要確定電話流量是和辦公室電腦的數(shù)據(jù)流量不是在同一個網(wǎng)絡(luò)上。以下哪個是最好的網(wǎng)絡(luò)設(shè)備,用來直連到電話和電腦，并且，哪種技術(shù)應(yīng)該被配置在該設(shè)備上A. hubB. routerC. switchD. STPE.subinterfacesF.VLANAnswer:CF22. Refertotheexhibit.WhichstatementdescribesDLCI17?23. 根據(jù)下圖，那個選項描述了DLCI17A. DLCI17describestheISDNcircuitbetwee

36、nR2andR3.A.DLCI17描述了R開口R/間的ISDN線路B. DLCI17describesaPVConR2.ItcannotbeusedonR3orR1.B.DLCI17描述了一條在R2JjqPVC不能用在R第口R1上C. DLCI17istheLayer2addressusedbyR2todescribeaPVCtoR3.C.DLCI17是R2®用的二層地址，用來描述一條到R3的PVCD. DLCI17describesthedial-upcircuitfromR2andR3totheserviceproviderD.DlDLCI17描述了一條從R2R3到服務(wù)提供商撥號

37、網(wǎng)絡(luò)Answer:C23. Whichroutingprotocolbydefaultusesbandwidthanddelayasmetrics?23.哪個路由協(xié)議默認用帶寬和延遲作為metrics值A(chǔ).RIPB.BGPC.OSPFD.EIGRPAnswer:D24. Refertotheoutputfromtheshowrunning-configcommandintheexhibit.WhatshouldtheadministratordotoallowtheworkstationsconnectedtotheFastEthernet0/0interfacetoobtainanIPadd

38、ress?24.根據(jù)下圖中展示的showrunning-config命令的結(jié)果。網(wǎng)絡(luò)管理員該如何做才能允許工作站連接至ijFastEthernet0/0接口去獲得一個IP地址R1-PBC#showrunmng-configCorrcohfiguration1Iversion12Jhoslnam*ARClip$ybnet-zFOIpname-e-rY«r192J6.1,1Ipdhcpexcluded-addless1090.20f.1jip曲卯poolABC_0HCPnetYwfc10.90,2010default-robtftr10.90.01.1dns-5

39、<ver52jinteHaceFasEthemei。冷noipdeeded-broadcastipnatinstdeIinterfaceSerial0(0desciip<iocitoISPcrcuitIDALOS1-3456AX743-00ipadless192317.S&255,52ipnatoutsidetipnatinsid-s<Hjrceust14inierfeceserial0/00xirloadip雨*雜的iproute0,0.000.0,0,0192,317,37|access-li5t14permit10.

40、90.201000.0255-ourpuf口fp/ffed、A. Applyaccess-group14tointerfaceFastEthernet0/0.A.在接口FastEthernet0/0應(yīng)用access-group14B. Addaccess-list14permitanyanytotheaccesslistconfiguration.B.在access-list14中添力口access-list14permitanyanyC. ConfiguretheIPaddressoftheFastEtherent0/0interfaceto.C.配置FastEther

41、ent0/0接口的IP地址為D. AddaninterfacedescriptiontotheFastEthernet0/0interfaceconfiguration.D.為接口FastEthernet0/0添加一個接口描述Answer:C25.Refertotheexhibit.ThenetworksconnectedtorouterR2havebeensummarizedasa/21routeandsenttoR1.WhichtwopacketdestinationaddresseswillR1forwardtoR2?(Choosetwo.

42、)25.根據(jù)下圖，網(wǎng)絡(luò)連接到路由器R蹴匯總為一條/21的路由，并發(fā)給R1。哪兩個數(shù)據(jù)包目的地址R1會轉(zhuǎn)發(fā)給R2OrhpiN(*rw oiksA. 60B. 1C. D. 55E. F. 5Answer:BEhave26.TworoutersnamedAtlantaandBrevardareconnectedbytheirserialinterfacesasshownintheexhibit,butthereisno

43、dataconnectivitybetweenthem.TheAtlantarouterisknowntoacorrectconfiguration.Giventhepartialconfigurationsshownintheexhibit,whatistheproblemontheBrevardrouterthatiscausingthelackofconnectivity?26.如下圖，兩個路由器(Atlanta和Brevard)用串口連接起來。但是他們之間沒有數(shù)據(jù)傳輸，已知Atlanta配置正確，下圖給出部分配置，路由器Brevard上導致該問題的原因是聞加占BrevaidAtlant

44、a# ehviw hiteitacea sOScridlO k up, line piotccol k upHarttwME % HD&457OInternet address is 192.168,1014MTU 15D0 如必，BW MJ KbitEncapsulation H0L( . locphack not setK領(lǐng)p“欣 Ht(10Brevard show hiuitacessiSeridll is 呷 Jine proiocol is upInienwt address / 192.011224MTU $500 bym. BW 5GOOO Kbit 伸 liabilit

45、y /535Encdpsiihtion HOL & I0叩hack not seiKeepalive-set (IDseciA. A loopback is not set.B. The IP address is incorrect.A.沒有設(shè)置loopback命令B.IP地址不正確C.子網(wǎng)掩碼不正確C.Thesubnetmaskisincorrect.D.串行鏈路封裝不正確D.Theseriallineencapsulationsareincompatible.E.Themaximumtransmissionunit(MTU)sizeistoolarge.E.最大傳輸單元(MTU)

46、設(shè)置得太大F.Thebandwidthsettingisincompatiblewiththeconnectedinterface.F.帶寬設(shè)置和直連的接口不匹配Answer:B27. Refertotheexhibit.Whichswitchprovidesthespanning-treedesignatedportroleforthenetworksegmentthatservicestheprinters?27.根據(jù)下圖，哪個交換機為打印機提供了生成樹中的指定端口角色？DistdbLotionSv/ilcltl丁MACdO1D.7Lcf.nMPiii 3gPrioriry J 期0010

47、71k c_732OSwH<h2PrlvrltetlttSwikhJSPriority 52764MAC 0fli0.7 bcc.T33 ali lpi如中32茁8MAC0aWJhcc.7M7A.Switch1B.Switch2C.Switch3D.Switch4Answer:C28. Refertotheexhibit.Switch-1needstosenddatatoahostwithaMACaddressof00b0.d056.efa4.Whatwilldowiththisdata?28.根據(jù)下圖，Switch-1需要往一臺MACfe址為00b0.d056.efa4的主機發(fā)數(shù)據(jù)，S

48、witch-1會如何處理這些數(shù)據(jù)？Switch-showmacaddress-tableDynamicAddressesCount3SecureAddresses(User-definedJCount：口StaticAddresses(Usendefined)Ccunt:0SystemSelfAddressesCount:41TotalMacaddresses:50Nor-staticAddressTableDettnationAddressAdd/sTyp巳VLANDestinationPort一w.arv-b-vwew.a.a-一n_>n一Br-arbrsm-n-awb-kanta0

49、010CdeOe289Dynamic1FasEthemetO/10010.7b00.1540Damic2FastEniemst0J30D107b001545ojnamtc2FastEttiemetOy?A. Switch-1willdropthedatabecauseitdoesnothaveanentryforthatMACaddress.A.Switch-1會丟棄該數(shù)據(jù)，因為它沒有該MACfe址條目B. Switch-1willfloodthedataoutallofitsportsexcepttheportfromwhichthedataoriginated.B.Switch-1會防洪該

50、數(shù)據(jù)到所有的接口，除了該數(shù)據(jù)的源接口C. Switch-1willsendanARPrequestoutallitsportsexcepttheportfromwhichthedataoriginated.C.Switch-1會發(fā)送ARP請求到所有的接口，除了該數(shù)據(jù)的源接口D. Switch-1willforwardthedatatoitsdefaultgateway.D.Switch-1會往默認網(wǎng)關(guān)發(fā)送該數(shù)據(jù)Answer:B29. IntheimplementationofVLSMtechniquesonanetworkusingasingleClassCIPaddress,whichsub

51、netmaskisthemostefficientforpoint-to-pointseriallinks?29.在使用VLSM技術(shù)的網(wǎng)絡(luò)中使用一個C類的IP地址，以下哪個子網(wǎng)掩碼在點對點串行鏈路中是最不浪費地址空間的？A.B.40C.48D.52E.54Answer:D30. Refertotheexhibit.WhywouldthenetworkadministratorconfigureRAinthismanner?30.根據(jù)下圖，網(wǎng)絡(luò)管理員如此配置的RA的原

52、因是？1QJZ110.1221GJ231OJ.1J10.1.1,21OJ.1.J"-iii'.nci*；'；iriin,i1,mi,研四幢“neWy04FAtonliq*ii日常2inA. togivestudentsaccesstotheInternetA.讓students訪可InternetB. topreventstudentsfromaccessingthecommandpromptofRAB.阻止students訪問RA的命令提示符C. topreventadministratorsfromaccessingtheconsoleofRAC.阻止管理員訪問R

53、A的控制臺D. togiveadministratorsaccesstotheInternetD.讓administrators訪問InternetE. topreventstudentsfromaccessingtheInternetE.阻止students訪問InternetF. topreventstudentsfromaccessingthenetworkF.阻止students訪問Admin的網(wǎng)絡(luò)Answer:B31. WhichtwovaluesareusedbySpanningTreeProtocoltoelectarootbridge?(Choosetwo.)31.那兩個值被生

54、成樹協(xié)議用來選舉根橋A. amountofRAMB.bridgepriorityC.IOSversionD.IPaddressE.MACaddressF.speedofthelinksAnswer:BE32.根據(jù)下圖，圖中兩個設(shè)備是網(wǎng)絡(luò)中僅有的CISCO設(shè)備，兩個設(shè)備間的串彳f鏈路的掩碼52,在下面的答案中，哪三個是正確的？MLanchHFsterLendsnHaiirkestfl'rrfah七討*也ittt:*一=j$1*cSi.KBj.T(Bi屈，*._W*>KaDsvtreID!11tHit1筌iTfireypiidri導n彳*，,：IPadrt:

55、easT10.L.I；?1actout：elscoE61Q#Capabilities:Ro-uer滸r:可：n.，n.F.irtTPtanrrjainrjpcirr："：日1。門iac:IE5i&utputQmHtteanA.TheManchesterserialaddressis.A.Manchester的串行鏈路的地址為B. TheManchesterserialaddressis.B.Manchester的串行鏈路的地址為C. TheLondonrouterisaCisco2610.C.London路由器是

56、CISCO2610D. TheManchesterrouterisaCisco2610.D.London路由器是CISCO2610E. TheCDPinformationwasreceivedonportSerial0/0oftheManchesterrouter.E.路由器Manchester的Serial0/0端口”到CDP信息F. TheCDPinformationwassentbyportSerial0/0oftheLondonrouter.F.路由器London的Serial0/0端口”到CDP言息Answer:ACE33.Whiletroubleshootinganetworkconnectivityproblem,atechnicianobservessteadylinklightsonboththeworkstationNICandtheswitchporttowhichtheworkstationisconnected.However,whenthepingcommandisissuedfromtheworkstation,theoutputmessage"Requestti