ccna题库2010v102

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1、考试大论坛—考试人的领地，您的梦想!www.examda.com..CCNAV102上卷（共上下两卷）1WhatcananetworkadministratorutilizebyusingPPPLayer2encapsulation?(Choosethree.)A.VLANsupportB.CompressionC.AuthenticationD.SlidingwindowsE.MultilinksupportF.QualityofserviceAnswer:B,C,E2Whichtwostatementsbestdescribethewirelesssecurity

2、standardthatisdefinedbyWPA?(Choosetwo.)A.Itspecifiesuseofastaticencryptionkeythatmustbechangedfrequentlytoenhancesecurity.B.Itrequiresuseofanopenauthenticationmethod.C.Itspecifiestheuseofdynamicencryptionkeysthatchangeeachtimeaclientestablishesaconnection.D.Itrequiresthatallaccesspoints

3、andwirelessdevicesusethesameencryptionkey.E.ItincludesauthenticationbyPSK.Answer:C,E3Whiletroubleshootingaconnectivityproblem,anetworkadministratornoticesthataportstatusLEDonaCiscoCatalystseriesswitchisalternatinggreenandamber.Whichconditioncouldthisindicate?A.Theportisexperiencingerror

4、s.B.Theportisadministrativelydisabled.C.Theportisblockedbyspanningtree.D.Theporthasanactivelinkwithnormaltrafficactivity.Answer:A4Refertotheexhibit.ThenetworkshownintheexhibitisrunningtheRIPv2routingprotocol.Thenetworkhasconverged,andtheroutersinthisnetworkarefunctioningproperly.TheFast

5、Ethernet0/0interfaceonR1goesdown.Inwhichtwowayswilltheroutersinthisnetwork..考试大论坛—考试人的领地，您的梦想!www.examda.com..respondtothischange?(Choosetwo.)A.Allrouterswillreferencetheirtopologydatabasetodetermineifanybackuproutestothe192.168.1.0networkareknown.B.RoutersR2andR3marktherouteasinaccessi

6、bleandwillnotacceptanyfurtherroutingupdatesfromR1untiltheirhold-downtimersexpire.C.Becauseofthesplit-horizonrule,routerR2willbepreventedfromsendingerroneousinformationtoR1aboutconnectivitytothe192.168.1.0network.D.WhenrouterR2learnsfromR1thatthelinktothe192.168.1.0networkhasbeenlost,R2w

7、illrespondbysendingaroutebacktoR1withaninfinitemetrictothe192.168.1.0network.E.R1willsendLSAstoR2andR3informingthemofthischange,andthenallrouterswillsendperiodicupdatesatanincreasedrateuntilthenetworkagainconverges.Answer:C,D5WhichthreestatementsarecorrectaboutRIPversion2?(Choo