CCNA、CCNP、CCIE模拟试题(一).doc

CCNA、CCNP、CCIE模拟试题(一)来源：考试大 2009/9/1【考试大：中国教育考试第一门户】模拟考场视频课程1.Whichofthefollowingtypesofpacketswillbeallowedentrywhenaserial interfacesinboundaccesslisthasbeenconfiguredtoprohibitentryforTCPand UDPports21,23and25?(Selectthreeoptions.) A.SMTPB.STPC.FTPD.TelnetE.HTTPF.POP3 2.OneofthetraineesassignedtoyouwanttoknowwhichservicesuseTCP.W hatcanyoutellhim?(Selectthreeoptions.) A.DHCPB.SMTPC.SNMPD.FTPE.HTTPF.TFTP 3.Whichofthefollowingnetworkmaskswouldyouusetoreduceanywastageof IPaddressesinpoint-to-pointWANlinksonanetworkthatsupportsVLSM? A./38B./30C./27D./23E./18 4.Howwouldyouconfigurearoutertoavoidsituationssuchassplithorizon issueshamperingroutingupdatesonaFrameRelaynetwork? A.Configureaseparatesub-interfaceforeachPVCwithauniqueDLCIandsubnet assignedtothesubinterface. B.ConfigureeachFrameRelaycircuitasapoint-to-pointlinetosupportmulticast andbroadcasttraffic. C.Configureonesub-interfacetodisperseintomultiplePVCconnectionsto multipleremoterouterinterfaces. D.Configureasmanyaspossiblesub-interfacesonthesamesubnet. 5.WithregardtoISDN,whichofthefollowingaretrue?(Chooseallthatapply.) A.LegacyDDRcanuseportinformationtodefineinterestingtraffic. B.LegacyDDRcanconfiguremultipledialerconfigurationsonthesameinterface. C.LegacyDDRcanuseACLstodefineinterestingtraffic. D.HDLCorPPPcanbeusedtoencapsulateISDNDchannelinformation. E.TheBRIinterfacesonISDNrouterswithdialerprofilesconfiguredcannotbelong tomultipledialerpools. F.DialerprofilescannotuseACLstodefineinterestingtraffic. -BSCI 6.Whichofthefollowingisacharacteristicoflink-stateprotocols? A.Anetworktopologychangegeneratesanupdatethatisbroadcasttoevery routeronthenetwork. B.Theperiodicroutingupdateintervalisslightlydifferentineachrouteron asubnet. C.Eachroutercreatesaroutingtablethatonlyincludesitsdirectlyconnected neighbors. D.Link-stateprotocolssendroutingupdatesonlywhenthereisachangeinthe networktopology. 7.Whatisthetermassociatedwithsynchronizingtheroutingtablesaftera 来源:考试大-思科认证topologychangeoccurs? A.floodingB.broadcastingC.convergenceD.summarization 8.Whichofthefollowingmustbedeterminedfirstbytherouterinorderto routethedata? A.thedistancemetricofthedata B.thesourceaddressofthedata C.whichroutingprotocolisusedbythedata D.whethertheprotocolsuiteofthedataisactive 9.YouareatechnicianatABC.ABChasthesubnet/maskof/26set asideforsmallremotelocations.Eachlocationwillhave5IPdevicesconnectedto thenetwork.WhichVLSMmaskwillprovidetheminimumnumberofhostsyourequire? A./27B./28C./29D./30E./31 10.YouareatraineetechnicianatABC.Yourinstructorshowsyouthefollowing routesummarizationentry: /22YourinstructorwantstoknowhowmanyclassCaddressesare containedinthissummarization.Whatwouldyourreplybe? A.1B.2C.4D.8E.1611.WhichcommandenablesanEtherChannelbundleonaCatalyst2900XLswitch?A.PortgroupB.SetportchannelonC.PortetherchannelenableD.Setetherchannelportenable12.WhichtwostatementsaboutdynamicVLANsaretrue?(Choosetwo)A.EachswitchportisassignedtoaspecificVLAN.B.DynamicVLANsrequireaVLANMembershipPolicyServer.C.DevicesareinthesameVLANregardlessofwhichporttheyattachto.D.DynamicVLANassignmentaremadethroughthecommandinterface.13.Whichstatementiscorrectabout802.1Qtrunking?(Selectallthatapply)A.BothswitchesmustbeinthesameVTPdomain.B.Theencapsulationtypeofbothendsofthetrunkdoesnothavetomatch.C.ThenativeVLANonbothendsofthetrunkmustbeVLAN1.D.802.1QtrunkingcanonlybeconfiguredonaLayer2port.E.In802.1Qtrunking,allVLANpacketsaretaggedonthetrunklink,exceptthenativeVLAN.14.YouneedtotakeadvantageofFastEthernetports.Whichtwoactionsavoidconfigurationproblemsthatcausetheporttobeautomaticallydisabled?(Choosetwo)A.Allowsomeportsinachanneltobedisabled.B.ConfiguretheportsinachannelasdynamicVLANports.C.Configureallportsinachanneltooperateatthesamespeedandduplexmode.D.AssignallportsinachanneltothesameVLANorconfigurethemastrunkports.15.Whatisthecauseofjitter?A.VariablequeuedelaysB.PacketdropsC.TransmittingtoomanysmallpacketsD.Compression-BCRAN16.RegardingDHCP,DHCPrelayandDHCPserveraremutuallyexclusive.A.Noneofthechoices.B.TrueC.FalseonlyforcertainIOSversionD.FalseE.FalseonlyforIOSversionbelowV1017.ALAPDAddressfieldcanbe1or2byteslong.A.TrueB.FalseC.TrueonlyintheUSD.TrueonlyinAsiaE.TrueonlyinEurope18.WhichofthefollowingarevalidfunctionsofthelockDTEmodemattribute(Chooseallthatapply)?A.DisableUART.B.EnableUART.C.LocksthedataspeedbetweenthecomputermotherboardandtheRS232port.D.LocksthedataspeedbetweenthemodemandtheDTEdevice.19.WhichofthefollowingarenotthevalidtypesofATMaddresses(Choose来源:考试大-思科认证allthatapply)?A.DCCB.GCTC.BSPD.ICDE.NSAPF.AED20.WhichofthefollowingareNOTthevalidtypesofX.25PLPpacketfields(Chooseallthatapply)?A.UserDataB.LCIC.GFID.PTIE.Noneofthechoices.-CIT21.YouareatechnicianatABC.com.YournewlyappointedABCtraineewantstoknowwhatthesimilaritiesbetweenTopologyDiagramsandNetworkConfigurationTablesare.Whatwouldyourreplybe?(Chooseallthatapply.)A.Bothsharefewcomponents.B.Bothsharemanyofthesamecomponents.C.Bothdefinephysicalmemorycomponents.D.Bothareusedfortroubleshooting.E.Bothuselinesandsymbolstorepresentnetworkcomponents.22.YouareatechnicianatABC.com.YournewlyappointedABCtraineewantstoknowwhatthedefaultactionfortheoutputofdebugandsystemerrormessagesis.Whatwouldyourreplybe?A.Outputgoestotheremoteconsoleifloggingisoff.B.Outputissenttotheconsoleterminal.C.ErrorloggingautomaticallyinvokesdebugoutputtothedesignatedTFTPserver. 来源:考试大-思科23.YouarethenetworkadministratoratABC.com.ABChasaswitchednetwork. Youwanttocontrolthedesignationofthespanning-treerootbridgeintheABCnetwork.Whatshouldyoudo? A.Byenablinguplink-fastontheportsofthedesiredswitch. B.Byloweringthebridgepriorityonthedesiredswitch. C.BysettingalowerMACaddressonthedesignatedswitch. D.ByraisingthebridgeIDononeswitch. 24.YouareatechnicianatABC.YoureceiveareportfromseveralABCuserswho complainthattheygetslowresponseswhensendingandreceivingemail,especially whenbrowsingtheInternet.Youinvestigatethecomplaintbycheckingtheoutput ofapingcommandissuedfromhercomputerandfindthatitindicatesintermitted successandfailuresmessages,whenattemptingtocontacttheemailserver.A tracerttothecorporateInternetgatewayroutershowshighlatencyandoccasional timeoutmessages. Whatwouldbethemosteffectivetroubleshootingapproachifyouaretodetermine thecauseoftheslowresponsetime? A.Bottom-upapproach B.Randomaccessapproach C.Divideandconquerapproach D.Top-downapproach E.Top-downrule-outapproach 25.YouareatechnicianatABC.com.YournewlyappointedABCtraineewantsto knowwhatfeaturesmakeOSPFmoresuitablethanRPinlargenetworkinstallations. Whatwouldyourreplybe?(Chooseallthatapply.) A.DiffusingUpdateAlgorithm B.Nohopcountlimitation C.Higherroutingupdateoverhead D.Fasterconvergence E.Lowerroutingupdateoverhead CCIE 26.YouarethenetworkadministratoratABC.Youaretroubleshootinganetwork problem.YouwanttotracetheroutetoaUnixworkstationthatyouwanttoreach throughtheInternet.However,Traceroutedoesnotwork. Currently,thereisaninboundaccess-listappliedtotheserialinterfaceon Router1.Anentryintheaccess-liststatesaccess-list101permittcpanyany. Whataccess-list entrymayyouneedtobeaddedtotheaccess-listinordertogettracerouteto work? A.access-list101permitudpanyany B.access-list101permiticmpanyanytime-exceededaccess-list101permiticmp anyanyport-unreachable C.access-list101permiticmpanyanytime-exceededaccess-list101permiticmp anyanynet-unreachable D.access-list101permiticmpanyanyechoaccess-list101permiticmpanyany 来源:考试大-思科认证认证net-unreachable E.access-list101permitudpanyanyaccess-list101permiticmpanyany protocol-unreachable 27.Wha