閆輝ccna考試試題講解-ccna640-802題庫

培訓(xùn)大講堂YY頻道CCNA題考試代號：640-通過分?jǐn)?shù)：題庫版本： 答疑地點：鴻鵠YY頻道3660 /thread-46172-1-培訓(xùn)大講堂YY頻道CCNA題庫戰(zhàn)報交 （500人超級群CCNA題庫戰(zhàn)報交流區(qū)： /forum-261-1000G免費 /forum-228-鴻鵠CCNA（640-802）題庫PassingScore:825TimeLimit:120minFileVersion:104.4CCNA（640-802）題庫CCNA題庫戰(zhàn)報500人超 CCNA題庫/戰(zhàn)報發(fā)布區(qū)： /forum-261-正版題庫、看考試戰(zhàn)報，請隨時關(guān)注鴻鵠CCNA考試報名1900，聯(lián)系鴻鵠區(qū)十七名- 153631-1-V104.1修正V104中錯誤題目，確定經(jīng)典爭議題目答案V104.2增加拖圖題并可完美，VCE題庫增加中文注釋針對思 A考試變題，更新考試新增題目93Q,更新V104.2實驗題2011.8.1增 增加6道選擇題524-增加1道拖圖題修改472題Chapter1:Chapter2:Chapter3:IPAddressingandChapter4:IntroductiontoCiscoChapter5:ManagingCiscoChapter6:IPChapter7:Chapter8:Chapter9:Chapter10:Chapter11:Chapter12:SecurityDeviceManagerChapter13:Chapter14:WideAreaNetworkNew-New-New-New-DragnExamAQUESTION1Whenyouareloggedintoaswitch,whichpromptindicatesthatyouareinprivileged%@>$#Answer:Section:Chapter4:IntroductiontoCisco模式就是#提示QUESTIONWhichcommandshowssystemhardwareandsoftwareversionshowshowshowshowshowAnswer:Section:Chapter4:IntroductiontoCisco查看系統(tǒng)的硬件信息使用令是showQUESTIONCiscoCatalystswitchesCAT1andCAT2haveaconnectionbetweenthemusingportsFA0/13.An802.1Qtrunkisconfiguredbetweenthetwoswitches.OnCAT1,VLAN10ischosenasnative,butonCAT2thenativeVLANisnotspecified.Whatwillhappeninthisscenario?802.1QgiantsframescouldsaturatetheVLAN10onCAT1andVLAN1onCAT2willsenduntaggedAnativeVLANmismatcherrormessagewillVLAN10onCAT1andVLAN1onCAT2willsendtaggedAnswer:Section:Chapter10:QUESTIONWhichcommandwouldcorrectlyconfigureaserialportonarouterwiththelastusablehostaddressinthe2/29subnet?A.Router(config-B.Router(config-C.Router(config-D.Router(config-E.Router(config-F.Router(config-Answer:Section:Chapter4:IntroductiontoCisco2/29它的塊大小為8掩碼為48地址范圍為2-QUESTIONThenetworkdefaultgatewayapplyingtoahostbyDHCPis3/28.WhichoptionisthevalidIPaddressofthishost?Answer:Section:Chapter3:IPAddressingand3/28所在網(wǎng)段的范圍是2--C：正確D：網(wǎng)絡(luò)號E：QUESTIONWhichtwoaddressescanbeassignedtoahostwithasubnetmaskof?(ChooseAnswer:Section:Chapter3:IPAddressingandA：網(wǎng)絡(luò)號B/D： 地址E：網(wǎng)絡(luò)號QUESTIONThenetworkadministratorhasaskedyoutocheckthestatusoftheworkstation'sIPstackbyingtheloopbackaddress.Whichaddresswouldyoutoperformthistask?Answer:Section:Chapter3:IPAddressingandQUESTIONWorkstationAhasbeenassignedanIPaddressof4/28.WorkstationBhasbeenassignedanIPaddressof00/28.Thetwoworkstationsareconnectedwithastraight-throughcable.Attemptstobetweenthehostsareunsuccessful.Whattwothingscanbedonetoallowcommunicationsbetweenthehosts?(Choosetwo.)Replacethestraight-throughcablewithacrossoverChangethesubnetmaskofthehoststoChangethesubnetmaskofthehoststoChangetheaddressofWorkstationAtoChangetheaddressofWorkstationBtoAnswer:Section:Chapter3:IPAddressingandQUESTIONYourISPhasgivenyoutheaddress/29toassigntoyourrouter'sinterface.Theyhavealsogivenyouthedefaultgatewayaddressof.Afteryouhaveconfiguredtheaddress,therouterisunabletoanyremotedevices.Whatispreventingtherouterfromingremotedevices?ThedefaultgatewayisnotanaddressonthisThedefaultgatewayisthebroadcastaddressforthisTheIPaddressisthebroadcastaddressforthisTheIPaddressisaninvalidclassDmulticastAnswer:Section:Chapter3:IPAddressingand/29所在網(wǎng)段的范圍是：-- 默認(rèn)網(wǎng)關(guān)是這個子網(wǎng)的廣播地址，正確C：這個地址是子網(wǎng)的廣播地址，錯誤D：這QUESTIONWhichcommandisusedtocopytheconfigurationfromRAMintocopyrunning-configstartup-copyrunningconfigstartupcopystartupconfigrunningwriteAnswer:Section:Chapter4:IntroductiontoCiscoQUESTIONWhichcommandisusedtoloadaconfigurationfromaTFTPserverandmergetheconfigurationintocopyrunning-config:copyTFTP:running-copyTFTP:startup-copystartup-config:Answer:Section:Chapter4:IntroductiontoCiscoQUESTIONAsystemadministratortypesthecommandtochangethehostnameofarouter.WhereontheCiscoIFSisthatchangestored?Answer:Section:Chapter4:IntroductiontoCiscoQUESTIONWhichcommandisusedtoconfigureadefaultA.B.C.D.Answer:Section:Chapter6:IPQUESTIONIfIProutingisenabled,whichtwocommandssetthegatewayoflastresorttothedefaultgateway?(Choosetwo.)ipdefault-gatewayiprouteipdefault-networkipdefault-routeiprouteAnswer:Section:Chapter6:IPiprouteQUESTIONWhichcommandwouldyouconfiguregloballyonaCiscorouterthatwouldallowyoutoviewdirectlyconnectedCiscodevices?enablecdpcdprunAnswer:Section:Chapter5:ManagingCiscoQUESTIONWhichcommandisusedtoseethepathtakenbypacketsacrossanIPshowipshowtraceipAnswer:Section:Chapter2:A:查看路由表B：沒有這條命令C： QUESTIONWhichcommandisusedtodebugadebugdebugipdebugdebugAnswer:Section:Chapter5:ManagingCiscoQUESTIONWhichcommanddisplaysCPUshowshowshowshowAnswer:Section:Chapter5:ManagingCisco查看CPU利用率QUESTIONWhenconfiguringaserialinterfaceonarouter,whatisthedefaultAnswer:Section:Chapter14:WideAreaNetworkQUESTIONWhatmustbesetcorrectlywhenconfiguringaserialinterfacesothathigher-levelprotocolscalculatethebestroute?Answer:Section:Chapter6:IPQUESTIONAcompanyimplementsconferencinerIPontheirEthernetLAN.Theusersnoticethatthenetworkslowsdown,andthe eitherstuttersorfailscomple y.WhatisthemostlikelyreasonforminimumcellratequalityofservicepacketswitchingexchangereliabletransportprotocolAnswer:Section:Chapter9:QUESTIONWhichlayerintheOSIreferencemodelisresponsiblefordeterminingtheavailabilityofthereceivingprogramandcheckingtoseeifenoughresourcesexistforthatcommunication?Answer:Section:Chapter1:QUESTIONDatatransferisslowbetweenthesourceanddestination.ThequalityofservicerequestedbythetransportlayerintheOSIreferencemodelisnotbeingmaintained.Tofixthisissue,atwhichlayershouldthetroubleshootingprocessbegin?Answer:Section:Chapter1:QUESTIONWhichprotocolsarefoundinthenetworklayeroftheOSIreferencemodelandareresponsibleforpathdeterminationandtrafficswitching?Answer:Section:Chapter1:QUESTIONWhichcommandrevealsthelastmethodusedtopowercycleashowshowshowrunning-showAnswer:Section:Chapter5:ManagingCiscoQUESTIONWhichthreeoptionsarevalidWANconnectivitymethods?(ChooseAnswer:Section:Chapter14:WideAreaNetwork D：多協(xié)議轉(zhuǎn)換，錯誤E： QUESTIONRefertotheexhibit.WhichWANprotocolisbeingFrameAnswer:Section:Chapter14:WideAreaNetworkQUESTIONWhatisthedifferencebetweenaCSU/DSUandaACSU/DSUconverts ogsignalsfromaroutertoaleasedline;amodemconverts ogsignalsfromaroutertoaleasedline.ACSU/DSUconverts ogsignalsfromaroutertoaphoneline;amodemconvertsdigitalsignalsfromaroutertoaleasedline.ACSU/DSUconvertsdigitalsignalsfromaroutertoaphoneline;amodemconverts ogsignalsfromaroutertoaphoneline.ACSU/DSUconvertsdigitalsignalsfromaroutertoaleasedline;amodemconvertsdigitalsignalsfromaroutertoaphoneline.Answer:Section:Chapter14:WideAreaNetworkCSU/DSU一般是專線，MODEN是將模擬信號與數(shù)字信號轉(zhuǎn)QUESTIONAnetworkadministratormustconfigure200switchportstoaccepttrafficfromonlythecurrentlyattachedhostdevices.WhatwouldbethemostefficientwaytoconfigureMAC-levelsecurityonalltheseports?VisuallyverifytheMACaddressesandthen nettotheswitchestoentertheswitchport-portsecuritymac-addresscommand.Haveendusers theirMACaddresses. nettotheswitchtoentertheswitchport-portsecuritymac-addresscommand.Usetheswitchportport-securityMACaddressstickycommandonalltheswitchportsthathaveenddevicesconnectedtothem.Useshowmac-address-tabletodeterminetheaddressesthatareassociatedwitheachportandthenenterthecommandsoneachswitchforMACaddressport-security.Answer:Section:Chapter9:考點：有200臺主機需要接入，采用什么方式來增強性？ D：錯誤，工作量太大QUESTIONWhentroubleshootingaFrameRelayconnection,whatis stepwhenperformingaloopbackSettheencapsulationoftheinterfacetoPlacetheCSU/DSUinlocal-loopEnablelocal-loopmodeontheDCEFrameRelayVerifythattheencapsulationissettoFrameAnswer:Section:Chapter14:WideAreaNetworkA：講接口配置成HDLC，正確，F(xiàn)R封裝下無法正常自己端QUESTIONWhatoccursonaFrameRelaynetworkwhentheCIRisAllTCPtrafficismarkeddiscardAllUDPtrafficismarkeddiscardeligibleand isAllTCPtrafficismarkeddiscardeligibleand isAlltrafficexceedingtheCIRismarkeddiscardAnswer:Section:Chapter14:WideAreaNetworkD：所有超過的流量都丟QUESTIONWhataretwocharacteristicsofFrameRelaypoint-to-pointsubinterfaces?(ChooseTheycreatesplit-horizonTheyrequireauniquesubnetwithina They easedTheyareidealforfull-meshTheyrequiretheuseofNBMAoptionswhenusingAnswer:Section:Chapter14:WideAreaNetwork C：類似專線，正確QUESTIONRefertotheexhibit.Addresseswithintherange/24arenotbeingtranslatedtothe1.128.0/16range.Whichcommandshowsif/24areallowedinsideaddresses?debugipshowaccess-showipnatshowipnatAnswer:Section:Chapter8:那條命令可以看到/24是否在允許轉(zhuǎn)換范。允許的范圍是通過ACL定義的。A：打開NAT轉(zhuǎn)換的debug信息，錯誤B：查看acl信息，正確。C：查看NAT轉(zhuǎn)換表，錯誤。D：查QUESTIONAwirelessclientcannotconnecttoan802.11b/gBSSwithab/gwirelesscard.TheclientsectionoftheaccesspointdoesnotlistanyactiveWLANclients.Whatisapossiblereasonforthis?TheincorrectchannelisconfiguredontheTheclient'sIPaddressisonthewrongTheclienthasanincorrectpre-shared isconfiguredincorrectlyontheAnswer:Section:Chapter11:A：不正確的信道。錯誤B：客戶端的IP地址配置錯誤C：客戶端的共享key錯誤。D：QUESTIONWhichtwofeatures v1addtoaddresstheinherentweaknessesfound ?(ChooseastrongerencryptionkeymixingusingtemporalsharedkeyashorterinitializationperframesequenceAnswer:Section:Chapter11:考點 1中增強哪兩個 中發(fā)現(xiàn)的弱點 存在的隱患主要是依賴共享密 QUESTIONWhichtwowirelessencryptionmethodsarebasedontheRC4encryptionalgorithm?(ChooseAnswer:Section:Chapter11:A:有線等效協(xié)議 QUESTIONWhataretwocharacteristicsofRIPv2?(Chooseclassfulroutingvariable-lengthsubnetmanualrouteusesSPFalgorithmtocomputeAnswer:Section:Chapter6:IPExplanation/Reference:A：有類路由協(xié)議，錯誤B：可變長度子網(wǎng)掩碼，正確C：采用廣播地址更新，錯誤D：QUESTIONWhichtwoEthernetfiber-opticmodessupportdistancesofgreaterthan5501000BASE-1000BASE-Answer:Section:Chapter1:A：最長距離25B：最長距離100米C：最長距離3000米D：最長距離550米E：QUESTIONWhattwothingswillarouterdowhenrunningadistancevectorroutingprotocol?(ChooseSendperiodicupdatesregardlessoftopologySendentireroutingtabletoallroutersinthe Usetheshortest-pathalgorithmtothedeterminebestUpdatetheroutingtablebasedonupdatesfromtheirMaintainthetopologyoftheentirenetworkinitsAnswer:Section:Chapter6:IPA：周期性更新，正 發(fā)送整個路由表到整個路由域，錯誤，只發(fā)送給鄰居C： 在數(shù)據(jù)庫中整個網(wǎng)絡(luò)的拓?fù)洹ｅe誤QUESTIONRefertotheexhibit.Accordingtotheroutingtable,wherewilltheroutersendapacketdestinedforAnswer:Section:Chapter6:IPQUESTIONWhichcommandshowsifanaccesslistisassignedtoanshowipinterface[interface]access-showipaccess-listsinterfaceshowipinterfaceshowipaccess-listsAnswer:Section:Chapter7:QUESTIONRefertotheexhibit.WhichruledoestheDHCPserverusewhenthereisanIP Theaddressisremovedfromthepooluntil isTheaddressremainsinthepooluntil isOnlytheIPdetectedbyGratuitousARPisremovedfromtheOnlytheIPdetectedbyisremovedfromtheTheIPwillbeshown,evenafter isAnswer:Section:Chapter5:ManagingCiscoshowipdhcp 命令可以查看哪些ip地址在使用上有。有的地址不再分配出去。 QUESTIONRefertotheexhibit.YouareconnectedtotherouterasuserMike.WhichcommandallowsyoutoseeoutputfromtheOSPFdebugcommand?terminalshowshowshowipospfAnswer:Section:Chapter6:IP QUESTIONRefertotheexhibit.Ifnumber2isselectedfromthesetupscript,whathappenswhentheuserrunssetupfromaprivilegedprompt?SetupisadditiveandanychangeswillbeaddedtotheconfigSetupeffectivelystartstheconfigurationoverasiftherouterwasbootedfor SetupwillnotrunifanenablesecretpasswordexistsontheSetupwillnotrun,becauseitisonlyviablewhennoconfigurationexistsontheAnswer:Section:Chapter4:IntroductiontoCisco[2]保存退 QUESTIONRefertotheexhibit.Which(config-router)commandwillallowthenetworkrepresentedontheinterfacetobeadvertisedbyRIP?redistributenetworkredistributenetworkAnswer:Section:Chapter6:IPQUESTIONRefertotheexhibit.WhatinformationcanbegatheredfromtheOnerouterisrunningRIPneighborisThenetworkcontainsaNetworkisAnswer:Section:Chapter6:IPQUESTIONRefertotheexhibit.WhattypeofconnectionwouldbesupportedbythecablediagramPCtoPCtoservertoroutertoAnswer:Section:Chapter1:AC/D同構(gòu)設(shè)備使用交叉QUESTIONRefertotheexhibit.WhattypeofconnectionwouldbesupportedbythecablediagramPCtoPCtoservertoswitchtoAnswer:Section:Chapter1:QUESTIONWhichtwostatementsdescribetheCiscoimplementationofVLANs?(ChooseVLAN1isthedefaultEthernetCDPadvertisementsareonlysentonVLANBydefault,themanagementVLANisVLANBydefault,theswitchIPaddressisinVLANVLAN1002through1005areautomaticallycreatedandcannotbeAnswer:Section:B：CDP信息只發(fā)送到vlan1002，錯誤，vlan1002是fddi網(wǎng)絡(luò)的vlanQUESTIONRefertotheexhibit.WhatcanbedeterminedabouttherouterfromtheconsoleNoconfigurationfilewasfoundinNoconfigurationfilewasfoundinNoconfigurationfilewasfoundinthePCMCIAConfigurationfileisnormalandwillloadin15Answer:Section:Chapter4:IntroductiontoCiscoQUESTIONRefertotheexhibit.Whatcanbedeterminedfromtheislocaltotheislocaltothewillageoutinlessthan1hasagedoutandismarkedforAnswer:Section:Chapter4:IntroductiontoCiscoQUESTIONRefertotheexhibit.Whichcommandwouldallowthetranslationstobecreatedontheipnatpoolmynats54prefix-lengthipnatoutsidemynats54prefix-lengthipnatpoolmynats54prefix-lengthipnatoutsidemynats54prefix-lengthAnswer:Section:Chapter8:準(zhǔn)確匯總掩碼是21，答案中沒有，退而求其次選QUESTIONRefertotheexhibit.Anadministratorsthedefaultgatewayatandseestheoutputasshown.AtwhichOSIlayeristheproblem?datalinkaccesssessionnetworkAnswer:Section:Chapter2:QUESTIONRefertotheexhibit.WhichvaluewillbeconfiguredforDefaultGatewayoftheLocalAreaAnswer:Section:Chapter3:IPAddressingand--54里面除了49外任意一個QUESTIONRefertotheexhibit.TheuseratWorkstationBreportsthatServerAcannotbereached.WhatispreventingWorkstationBfromreachingServerA?TheIPaddressforServerAisabroadcastTheIPaddressforWorkstationBisasubnetThegatewayforWorkstationBisnotonthesameThegatewayforServerAisnotonthesameAnswer:Section:Chapter6:IP4/27所在網(wǎng)絡(luò)范圍為：-31/27。很明顯網(wǎng)關(guān)3不再范圍內(nèi)QUESTIONRefertotheexhibit.Whatdoesthe(*)representinthePacketisdestinedforalocalinterfacetothePacketwastranslated,butnoresponsewasreceivedfromthedistantPacketwasnottranslated,becausenoadditionalportsarePacketwastranslatedandfastswitchedtotheAnswer:Section:Chapter8:QUESTIONRefertotheexhibit.WhatcommandsequencewillenablePATfromtheinsidetooutside(config)ipnatpoolisp-netnetmask(config-if)ipnatoutside(config)ipnatinsidesourcelist1interfaceethernet1(config-if)ipnatinsideAnswer:Section:Chapter8:QUESTIONRefertotheexhibit.WhatwillhappentoHTTPtrafficcomingfromtheInternetthatisdestinedfor0ifthetrafficisprocessedbythisACL?Trafficwillbedroppedperline30oftheTrafficwillbeacceptedperline40oftheTrafficwillbedropped,becauseoftheimplicitdenyall oftheTrafficwillbeaccepted,becausethesourceaddressisnotcoveredbytheAnswer:Section:Chapter7:ACL匹配規(guī)QUESTIONRefertotheexhibit.WhichstatementdescribestheeffectthattheRouter1configurationhasondevicesinthesubnetwhentheytrytoconnecttoSVR-Ausing netorSSH?Deviceswillnotbeableto netorDeviceswillbeabletouseSSH,but Deviceswillbeableto net,butnotDeviceswillbeableto netandAnswer:Section:Chapter7:題目考查的是ACL用法，首先看圖所以list100中10生效，20無效。list101中10生效，20無效。最后默認(rèn)都，所以只允許sshQUESTIONWhatarethreeadvantagesofVLANs?(ChooseVLANsestablish sinswitchedVLANsutilizepacketfilteringtoenhancenetworkVLANsprovideamethodofconservingIPaddressesinlargeVLANsprovidealow-latencyinternetworkingalternativetoroutedVLANsallowaccesstonetworkservicesbasedondepartment,notphysicalVLANscangreatlysimplifyadding,moving,orchanginghostsontheAnswer:Section:Chapter10:A：VLAN在交換網(wǎng)絡(luò)中建立廣播域，正B：利用VLAN的數(shù)據(jù)濾，增強網(wǎng)絡(luò)的安全性。錯誤，沒有這個特性QUESTIONAnadministratorwouldliketoconfigureaswitchoveravirtualterminalconnectionfromlocationsoutsideofthelocalLAN.Whichofthefollowingarerequiredinorderfortheswitchtobeconfiguredfromaremotelocation?(Choosetwo.)The ustbeconfiguredwithanIPaddress,subnetmask,anddefaultThe ustbeconnectedtoarouteroveraVLANThe ustbereachablethroughaportconnectedtoitsmanagementTheswitchconsoleportmustbeconnectedtotheEthernetThe anagementVLANmustbecreatedandhaveamembershipofatleastoneswitchThe ustbefullyconfiguredasanSNMPAnswer:Section:Chapter9:要想管理VLAN，1、交換機配置IP，2、路由可達QUESTIONWhichofthefollowinghostaddressesaremembersofnetworksthatcanberoutedacrossthepublicInternet?(Choosethree.)Answer:Section:Chapter3:IPAddressingand/8-/16--/24-QUESTIONGivenasubnetmaskof24,whichofthefollowingaddressescanbeassignedtonetworkhosts?(Choosethree.)Answer:Section:Chapter3:IPAddressingandQUESTIONWhichofthefollowingarebenefitsofVLANs?(ChooseTheyincreasethesizeof TheyallowlogicalgrouofusersbyTheycanenhancenetworkTheyincreasethesizeof swhiledecreasingthenumberof Theyincreasethenumberof swhiledecreasingthesizeofthe TheysimplifyswitchAnswer:Section:Chapter10: 減少廣播域的大小時增加了廣播域個數(shù)。正確。F:QUESTIONWhichrouterIOScommandscanbeusedtotroubleshootLANconnectivityproblems?(ChooseshowipshowAnswer:Section:Chapter6:IP 查看是否有路由F：QUESTIONRefertotheexhibit.AfterHostAsHostB,whichentrywillbeintheARPcacheofHostAtosupportthisAnswer:Section:Chapter2:QUESTIONWhichtwotopologiesareusingthecorrecttypeoftwisted-paircables?(Choosetwo.)Answer:Section:Chapter1:QUESTIONWhichofthefollowingaretrueregardingbridgesandswitches?(ChooseBridgesarefasterthanswitchesbecausetheyhavefewerAswitchisamultiportBridgesandswitcheslearnMACaddressesbyexaminingthesourceMACaddressofeachframeAbridgewillforwardabroadcastbutaswitchwillBridgesandswitchesincreasethesizeofa Answer:Section:Chapter9:考查網(wǎng)橋和交換機的區(qū) 網(wǎng)橋比交換機更快速，因為他們有更少的端口。錯誤B： 過檢查數(shù)據(jù)包的sourcemac學(xué)習(xí)mac地址，正確D：網(wǎng) QUESTIONWhataresomeoftheadvantagesofusingaroutertosegmentthenetwork?(ChooseFilteringcanoccurbasedonLayer3BroadcastsareRoutersgenerallycostlessthanBroadcastsarenotforwardedacrosstheAddingaroutertothenetworkdecreasesAnswer:Section:Chapter1: 可以基于層三的信息過濾數(shù)據(jù)。B：廣 器的價格一般比交換機少。錯誤D：廣QUESTIONWhichofthefollowingstatementsaretrueregardingbridgesandswitches?(ChooseSwitchesareprimarilysoftwarebasedwhilebridgesarehardwareBothbridgesandswitchesforwardLayer2BridgesarefrequentlyfasterthanSwitcheshaveahighernumberofportsthanmostBridgesdefine swhileswitchesdefine BothbridgesandswitchesmakeforwardingdecisionsbasedonLayer2Answer:Section:Chapter9: 交換機基于，網(wǎng)橋基于硬件，錯誤。交換機是基于硬件，網(wǎng)橋是基于B： 橋定義廣播域，交換機定義域，錯誤。F:基QUESTIONWhichcharacteristicsarerepresentativeofalink-stateroutingprotocol?(ChooseprovidescommonviewofentireexchangesroutingtableswithcalculatesshortestutilizesfrequentperiodicAnswer:Section:Chapter6:IPA:提供查看拓?fù)淞?，正確。showipospfdatabase QUESTIONWhichofthefollowingstatementsdescribethenetworkshowninthegraphic?(ChooseTherearetwo sintheTherearefour sintheTherearesix sintheTherearefour sintheTherearefive sintheThereareseven sintheAnswer:Section:Chapter1:QUESTIONUsetheoutputfromtheroutershowninthegraphicabovetodeterminewhichofthefollowingarecorrect.(Choosetwo.)RouterJohnusesalink-stateroutingRouterJohnwillreceiveroutingupdatesontheSerial0/0RouterJohnwillreceiveroutingupdatesontheSerial0/1RouterJohnwillsendroutingupdatesouttheSerial0/0RouterJohnwillsendroutingupdatesouttheFastEthernet0/0RouterJohnwillsendroutingupdatesouttheSerial0/1Answer:Section:Chapter6:IP由圖 、的地QUESTIONAnationalretailchainneedstodesignanIPaddressingschemetosupportanationwidenetwork.Thecompanyneedsaminimumof300sub-networksanda umof50hostaddressespersubnet.WorkingwithonlyoneClassBaddress,whichofthefollowingsubnetmaskswillsupportanappropriateaddressingscheme?(Choosetwo.)Answer:Section:Chapter3:IPAddressingand需要至少300個子網(wǎng)，每個子網(wǎng)至少50臺主機。使用一個B類地址來劃分C：只有64個子網(wǎng) 每個子網(wǎng)只有30個可用IPF：QUESTIONGiventheaddress9/28,whichofthefollowingarevalidhostaddressesonthissubnet?(Choosetwo.)Answer:Section:Chapter3:IPAddressingand9/28所屬網(wǎng)段的范圍是：6-QUESTIONAninboundaccesslisthasbeenconfiguredonaserialinterfacetodenypacketentryforTCPandUDPports21,23and25.WhattypesofpacketswillbepermittedbythisACL?(Choosethree.)Answer:Section:Chapter2:acl了tcp/udp212325這三個端口的流量，哪些流量會被放行？A：FTP21端口 NET23端口C：SMTP25端口D：DNS53端口E：HTTP80端口FPOP3110QUESTIONWhicharevalidmodesforaswitchportusedasaVLANtrunk?(ChooseAnswer:Section:Chapter10:QUESTIONOSPFroutingusestheconceptofareas.WhatarethecharacteristicsofOSPFareas?(ChooseEachOSPFarearequiresaloopbackinterfacetobeAreasmaybeassignedanynumberfrom0toArea0iscalledthebackboneHierarchicalOSPFnetworksdonotrequiremultipleMultipleOSPFareasmustconnecttoareaSingleareaOSPFnetworksmustbeconfiguredinareaAnswer:Section:Chapter6:IPA：每個區(qū)域需要換回口，錯誤B：區(qū)域ID的可以設(shè)置為0--65535，正確C： QUESTIONWhatinformationdoesarouterrunningalink-stateprotocolusetobuildandmaintainitstopologicaldatabase?(Choosetwo.)oSAPmessagessentbyotherLSAsfromotherbeaconsreceivedonpoint-to-pointroutingtablesreceivedfromotherlink-stateTTLpacketsfromdesignatedAnswer:Section:Chapter6:IP鏈路狀態(tài)路由協(xié)議如何拓?fù)鋽?shù)據(jù)庫？ o包用于鄰居關(guān)系，正確。B： 通過其他路由器的LSA，正確。D：從QUESTIONWhichstatementsdescribetheroutingprotocolOSPF?(ChooseItsupportsItisusedtoroutebetweenautonomousItconfinesnetworkinstabilitytooneareaoftheItincreasesroutinerheadontheItallowsextensivecontrolofroutingItissimplertoconfigurethanRIPAnswer:Section:Chapter6:IPB：在AS之間使用，錯誤。在ASC：限制了不穩(wěn)定網(wǎng)絡(luò)的范圍，正確。通過劃分區(qū)域?qū)崿F(xiàn)。D： QUESTIONTheswitchesshowninthediagram,CoreandCore2,arebothCatalyst2950s.Theaddressingschemeforeachcompanysiteisasfollows:RouterEthernetport-1stusableaddressCore-2ndusableaddressCore2-3rdusableForthisnetwork,whichofthefollowingcommandsmustbeconfiguredonCore2toallowittobemanaged yfromanysubnetonthenetwork?(Choosethree.)Core2(config)#interfaceCore2(config-if)#ipaddress0Core2(config)#interfacevlanCore2(config-if)#ipaddress1Core2(config)#linecon0Core2(config-line)#passwordciscoCore2(config)#linevty04Core2(config-line)#passwordciscoCore2(config)#ipdefault-gatewayCore2(config)#iprouteAnswer:Section:Chapter10: QUESTIONAnadministratorisunsuccessfulinaddingVLAN50toaswitch.Whiletroubleshootingtheproblem,theadministratorviewstheoutputoftheshowvtpstatuscommand,whichisdisplayedinthegraphic.WhatcommandsmustbeissuedonthisswitchtoaddVLAN50tothedatabase?(Choosetwo.)Switch(config-if)#switchportaccessvlanSwitch(vlan)#vtpSwitch(config)#vlan50nameSwitch(vlan)#vlanSwitch(vlan)#switchporttrunkvlanAnswer:Section:Chapter10:無法在交換機上添加vlan50的原因QUESTIONWhichofthefollowingIPaddressesfallintotheCIDRblockof/22?(ChooseAnswer:Section:Chapter3:IPAddressingand/22的范圍是/22--QUESTIONWhichofthefollowingaretypesofflowcontrol?(ChoosecongestionloadAnswer:Section:Chapter2:A：緩存 口機制D：擁E：負(fù)QUESTIONWhichdestinationaddresseswillbeusedbyHostAtosenddatatoHostC?(ChoosetheIPaddressofSwitchtheMACaddressofSwitchtheIPaddressofHosttheMACaddressofHosttheIPaddressoftherouter'sE0theMACaddressoftherouter'sE0Answer:Section:Chapter6:IPQUESTIONWhatcanbedeterminedfromthelineofshowiprouteoutputshownintheexhibit?(ChooseThenextroutingupdatecanbeexpectedin35TheIPaddressisconfiguredonTheIPaddressisconfiguredonThisrouteisusingthedefaultadministrativeThenetworkistwohopsawayfromthisAnswer:Section:Chapter6:IP考點：考查RIP的路由條目。通過RIP學(xué)習(xí)到一條到達的路由，下一跳是，出接s/1A：錯誤。rip更新周期為30s，正常計時器不會超過30B： 正確，rip缺省的管理距離是120E：QUESTIONRefertotheexhibit.Alloftheroutersinthenetworkareconfiguredwiththeipsubnet-zerocommand.WhichnetworkaddressesshouldbeusedforLinkAandNetworkA?(Choosetwo.)NetworkA-NetworkA-NetworkA-LinkA-LinkA-LinkA-Answer:Section:Chapter3:IPAddressingand 正確。因為使用了ipsubnet-zero網(wǎng)段中QUESTIONWhichtwosubnetworkswouldbeincludedinthesummarizedaddressof/20?(ChooseAnswer:Section:Chapter3:IPAddressingand/20網(wǎng)段所在的范圍是--QUESTIONThenetworkadministratorhasdiscoveredthatthepowersupplyhasfailedonaswitchinthecompanyLANandthattheswitchhasstoppedfunctioning.IthasbeenreplacedwithaCiscoCatalyst2950seriesswitch.Whatmustbedonetoensurethatthisnewswitch estherootbridgeonthenetwork?LowerthebridgepriorityChangetheMACaddressoftheIncreasetheVTPrevisionnumberfor LowertherootpathcostontheswitchAssigntheswitchanIPaddresswiththelowestAnswer:Section:Chapter9:考點：STP的原則QUESTIONRefertotheexhibit.Assumethatalloftherouterinterfacesareoperationalandconfiguredcorrectly.HowwillrouterR2beaffectedbytheconfigurationofR1thatisshownintheexhibit?RouterR2willnotformaneighborrelationshipwithRouterR2willobtainafullroutingtable,includingadefaultroute,fromR2willobtainOSPFupdatesfromR1,butwillnotobtainadefaultroutefromR2willnothavearouteforthedirectlyconnectedserialnetwork,butallotherdirectlyconnectednetworkswillbepresent,aswellasthetwoEthernetnetworksconnectedtoR1.Answer:Section:Chapter6:IPQUESTIONWhichthreeIPaddressescanbeassignedtohostsifthesubnetmaskis/27andsubnetzeroisusable?(Choosethree.)Answer:Section:Chapter3:IPAddressingand掩碼為27，所以一個子網(wǎng)可以有32個IP，可用的30A：-31/27，正D：2-63/27,QUESTIONRefertotheexhibit.ApacketwithasourceIPaddressofandadestinationIPaddressarrivesattheHokesBrouter.WhtiondoestherouterforwardsthereceivedpacketouttheSerial0/0forwardsapacketcontaininganEIGRPadvertisementouttheSerial0/1forwardsapacketcontaininganICMPmessageouttheFastEthernet0/0forwardsapacketcontaininganARPrequestouttheFastEthernet0/1Answer:Section:Chapter6:IPQUESTIONRefertotheexhibit.FromRouterA,anetworkadministratorisabletotheserialinterfaceofRouterBbutunabletoanyofthesubnetsattachedtoRouterB.Basedonthepartialoutputsintheexhibit,whatcouldbetheproblem?EIGRPdoesnotsupportTheEIGRPnetworkstatementsareincorrectlyTheIPaddressingontheserialinterfaceofRouterAisTheroutingprotocolhassummarizedontheclassfulEIGRPhasbeenconfiguredwithaninvalidautonomoussystemAnswer:Section:Chapter6:IPQUESTIONWhatarethreecharacteristicsoftheOSPFroutingprotocol?(ChooseItconvergesOSPFisaclassfulroutingItusescosttodeterminethebestItusestheDUALalgorithmtodeterminethebestOSPFrouterssendthecompleteroutingtabletoalldirectlyattachedOSPFroutersdiscoverneighborsbeforeexchangingroutingAnswer:Section:Chapter6:IP考查OSPF特性A：收斂快，正確B： 使用dual算法，錯誤，這個是EIGRP的算法E：發(fā)送全部路由信息，錯誤，增量更新。F：在QUESTIONRefertotheexhibit.SW1andSW2havedefaultconfigurations.Whatwillhappenifhost1sendsaHosts2,3,and4willreceivetheHosts1,2,3,and4willreceivetheHost2andtheFa0/0interfaceofR1willreceivetheHosts1,2andtheFa0/0interfaceofR1willreceivetheHosts1,2,3,4andinterfaceFa0/0ofR1willreceivetheHosts2,3,4,andinterfacesFa0/0andFa0/1ofR1willreceivetheAnswer:Section:Chapter6:IPQUESTIONArouterhaslearnedthreepossibleroutesthatcouldbeusedtoreachadestinationnetwork.OnerouteisfromEIGRPandhasacompositemetricof20514560.AnotherrouteisfromOSPFwithametricof782.ThelastisfromRIPv2andhasametricof4.WhichrouteorrouteswilltherouterinstallintheroutingtheOSPFtheEIGRPtheRIPv2allthreetheOSPFandRIPv2Answer:Section:Chapter6:IPEIGRPOSPFRIPQUESTIONForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses?(ChoosetouniquelyidentifydevicesatLayertoallowcommunicationwithdevicesonadifferenttodifferentiateaLayer2framefromaLayer3toestablishaprioritysystemtodeterminewhichdevicegetstotoallowcommunicationbetweendifferentdevicesonthesametoallowdetectionofaremotedevicewhenitsphysicaladdressisAnswer:Section:Chapter1: 是設(shè)備在不同的網(wǎng)絡(luò)中通信，錯誤，不同網(wǎng)絡(luò)通信需要通過IP地址確定。C： QUESTIONAsaframeleavesaLayer3device,theLayer2encapsulationinformationischangedfromwhatitwaswhenitenteredthedevice.Forwhattworeasonscanthishappen?(Choosetwo.)Thedataismovingfrom10BASE-TXto100BASE-TheWANencapsulationtypehasThedataformathaschanged ogtoThesourceanddestinationhostsareinthesameThesourceanddestinationMACaddresseshaveAnswer:Section:Chapter14:WideAreaNetworkQUESTIONWhichtwostatementsaretrueregardingEIGRP?(ChoosePassiveroutesareintheprocessofbeingcalculatedbyEIGRPsupportsVLSM,routesummarization,androutingupdateEIGRPexchangesfullroutingtableinformationwithneighboringrouterswitheveryIfthefeasiblesuccessorhasahigheradvertiseddistancethan