CISCO 真题

CCNA、CCNP、CCIE模拟试题CCNA1.Whichofthefollowingtypesofpacketswillbeallowedentrywhenaserialinterface'sinboundaccesslisthasbeenconfiguredtoprohibitentryforTCPandUDPports21,23and25?(Selectthreeoptions.)A.SMTPB.STPC.FTPD.TelnetE.HTTPF.POP32.OneofthetraineesassignedtoyouwanttoknowwhichservicesuseTCP.Whatcanyoutellhim?(Selectthreeoptions.)A.DHCPB.SMTPC.SNMPD.FTPE.HTTPF.TFTP3.WhichofthefollowingnetworkmaskswouldyouusetoreduceanywastageofIPaddressesinpoint-to-pointWANlinksonanetworkthatsupportsVLSM?A./38B./30C./27D./23E./184.HowwouldyouconfigurearoutertoavoidsituationssuchassplithorizonissueshamperingroutingupdatesonaFrameRelaynetwork?A.Configureaseparatesub-interfaceforeachPVCwithauniqueDLCIandsubnetassignedtothesubinterface.B.ConfigureeachFrameRelaycircuitasapoint-to-pointlinetosupportmulticastandbroadcasttraffic.C.Configureonesub-interfacetodisperseintomultiplePVCconnectionstomultipleremoterouterinterfaces.D.Configureasmanyaspossiblesub-interfacesonthesamesubnet.5.WithregardtoISDN,whichofthefollowingaretrue?(Chooseallthatapply.)A.LegacyDDRcanuseportinformationtodefineinterestingtraffic.B.LegacyDDRcanconfiguremultipledialerconfigurationsonthesameinterface.C.LegacyDDRcanuseACLstodefineinterestingtraffic.D.HDLCorPPPcanbeusedtoencapsulateISDNDchannelinformation.E.TheBRIinterfacesonISDNrouterswithdialerprofilesconfiguredcannotbelongtomultipledialerpools.F.DialerprofilescannotuseACLstodefineinterestingtraffic.CCNP-BSCI6.Whichofthefollowingisacharacteristicoflink-stateprotocols?A.Anetworktopologychangegeneratesanupdatethatisbroadcasttoeveryrouteronthenetwork.B.Theperiodicroutingupdateintervalisslightlydifferentineachrouteronasubnet.C.Eachroutercreatesaroutingtablethatonlyincludesitsdirectlyconnectedneighbors.D.Link-stateprotocolssendroutingupdatesonlywhenthereisachangeinthenetworktopology.7.Whatisthetermassociatedwithsynchronizingtheroutingtablesafteratopologychangeoccurs?A.floodingB.broadcastingC.convergenceD.summarization8.Whichofthefollowingmustbedeterminedfirstbytherouterinordertoroutethedata?A.thedistancemetricofthedataB.thesourceaddressofthedataC.whichroutingprotocolisusedbythedataD.whethertheprotocolsuiteofthedataisactive9.YouareatechnicianatABC.ABChasthesubnet/maskof172.29.100.0/26setasideforsmallremotelocations.Eachlocationwillhave5IPdevicesconnectedtothenetwork.WhichVLSMmaskwillprovidetheminimumnumberofhostsyourequire?A./27B./28C./29D./30E./3110.YouareatraineetechnicianatABC.Yourinstructorshowsyouthefollowingroutesummarizationentry:192.168.134.0/22YourinstructorwantstoknowhowmanyclassCaddressesarecontainedinthissummarization.Whatwouldyourreplybe?A.1B.2C.4D.8E.16-BCMSN11.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(Chooseallthatapply)?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.YournewlyappointedABCtraineewantstoknowwhatthedefau