網(wǎng)絡(luò)工程師道基礎(chǔ)試題

1、網(wǎng)絡(luò)工程師道基礎(chǔ)試題網(wǎng)絡(luò)工程師道基礎(chǔ)試題網(wǎng)絡(luò)工程師道基礎(chǔ)試題1000道基礎(chǔ)知識題目有時間能夠練習(xí)一下有的題目已經(jīng)過時可是選擇性地看一下吧1Assystemadministrator,youtypedebugipxsapandreceivethefollowinglinesaspartoftheIOSresponse:type0 x4,HELLO2,199.0002.0003.0006(451),2hopstype0 x4,HELLO1,199.0002.0003.0008(451),2hopsWhatdoes0 x4signify?A.ThatisaGetNearestServerrespon

2、se.B.ThatitisaGeneralquery.C.ThatitisaGeneralresponse.D.ThatitisaGetNearestServerrequest.AnsA2TomonitorIPigrptraffic,youcanusedebugIPigrptransactionordebugIPigrpevents.HowdoyoudisplayinformationaboutIPXroutingupdatepackets?A.debugroutingB.debugipxtransactionC.debugipxroutingactivityD.debugipxeventsA

3、ns:C3Tomonitoripxtrafficonanetwork,whatcommandwouldyouuse?A.debugipxtransactionB.showipxtrafficC.showipxeventsD.displayipxtrafficAnsB4WhatcommandwouldyouusetofindoutthenamesofNovellserversonanetwork?A.showipxserversB.showipxhostsC.showipxsapD.showipxnodes.AnsA5Theipxdelaynumbercommandwillallowanadmi

4、nistratortochangethedefaultsettings.Whatarethedefaultsettings?A.ForLANinterfaces,onetick;forWANinterfaces,sixticksB.ForLANinterfaces,sixticks;forWANinterfaces,onetickC.ForLANinterfaces,zeroticks;forWANinterfaces,fiveticksD.ForLANinterfaces,fiveticks;forWANinterfaces,zeroTicksAnsAThedefaultis-forLANi

5、nterfaces,onetick;forWANinterfaces,sixticks6Asasystemadministrator,youneedtosetuponeEthernetinterfaceontheCiscoroutertoallowforbothsapandNovell-etherencapsulations.Whichsetofcommandswillaccomplishthis?A.interfaceethernet0.1ipxencapsulationNovell-etheripxnetwork9einterfaceethernet0.2ipxnetwork6cB.int

6、erfaceethernet0ipxencapsulationNovell-etheripxnetwork9einterfaceethernet0ipxencapsulationsapipxnetwork6cC.interfaceethernet0.1ipxencapsulationNovell-etherinterfaceethernet0.2ipxencapsulationsapD.interfaceethernet0.1ipxencapsulationNovell-etheripxnetwork9einterfaceethernet0.2ipxencapsulationsapipxnet

7、work6cAnsDThefollowingcommandssetupthesubinterfacestoallowfortwotypesofencapsulation:interfaceethernet0.1ipxencapsulationNovell-etheripxnetwork9einterfaceethernet0.2ipxencapsulationsapipxnetwork6c7WhatdoestheIPXmaximum-paths2commandaccomplish?A.Itenablesloadsharingon2pathsifthepathsareequalmetricpat

8、hs.B.Itsetsuproutingtogotonetwork2.C.ItisthedefaultforCiscoIPXloadsharing.D.Itenablesloadsharingon2pathsifthepathsareunequalmetricpaths.AnsAItenablesloadsharingon2pathsifthepathsareequalmetricpaths.Thedefaultis1pathandthemaximumis512paths.8Youwanttoenablebotharpaandsnapencapsulationononerouterinterf

9、ace.Howdoyoudothis?A.Theinterfacecanhandlemultipleencapsulationtypeswithnoextraconfiguration.B.Assigntwonetworknumbers,oneforeachencapsulationtype.C.EnableNovell-ethertorunmultipleencapsulationtypes.D.Botharpaandsnapareenabledbydefaultsoyoudonthavetoconfigureanything.AnsBToassignmultiplenetworknumbe

10、rs,youusuallyusesubinterfaces.Asampleconfigurationfollows:ipxethernet0.1ipxencapsulationnovell-etheripxnetwork9einterfaceethernet0.2ipxencapsulationsapipxnetwork6c8Bydefault,CiscoroutersforwardGNSSAPstoremotenetworks.A.FalseB.TrueAnsAGNSisNovellsprotocoltoGetNearestServer.Ifthereisaserveronthelocaln

11、etwork,thatserverwillrespond.Ifthereisnt,theCiscorouterhastobeconfiguredtoforwardtheGNSSAP.9TopreventServiceAdvertisements(SAPs)fromfloodinganetwork,Ciscoroutersdonotforwardthem.Howareservicesadvertisedtoothernetworks?A.EachrouterbuildsitsownSAPtableandforwardsthatevery60seconds.B.Eachrouterassignsa

12、servicenumberandbroadcaststhat.C.SAPsarentnecessarywithCiscorouters.D.CiscoroutersfilteroutallSAPs.Ans:ACiscoroutersbuildSAPtablesandforwardthetableevery60seconds.AllSAPscantbefilteredevenwith4.xsinceNDSandtimesynchronizationusesSAPs.10NovellsimplementationofRIPupdatesroutingtablesevery_seconds.A.60

13、B.90C.10D.30AnsANovellsRIPupdatesroutingtablesevery60seconds,ApplesRTMPisevery10seconds,routersARPevery60seconds,IGRPsignalevery90seconds,andBanyanVINESsignalsevery90seconds.11InNovellsuseofRIP,therearetwometricsusedtomakeroutingdecisions.Selectthetwometrics.A.Ticks.B.HopsC.LoopsD.CountsAns:A&BItfir

14、stusesticks(whichisabout1/18sec.);ifthereisatie,ituseshops;ifhopsareequal,thenitusesanadministrativelyassignedtiebreaker.12WhatistheCisconamefortheencapsulationtypeusedonaserialinterface?A.HDLCB.SDLCC.SAPD.SNAPAnsA13arpaisusedbytheCiscoIOSforwhichencapsulationtypes?A.Ethernet_IIB.Ethernet_802.3C.Eth

15、ernet_802.2D.Ethernet_SNAPAnsANovellsIPXandCiscosIOSnametheirprotocolsdifferently.CiscousessapforEthernet_802.2,Token-Ring,andNovellsFDDI_802.2.CiscousessnapforEthernet_SNAP,Token-Ring_SNAP,andFDDI_SNAP.CiscousesarpaforEthernet_IIand,finallythedefaultisNovell-etherforNovellsEthernet_802.3.14snapisus

16、edbytheCiscoIOSforwhichencapsulationtypes?A.Ethernet_SNAPB.Token-Ring_SNAPC.FDDI_SNAPD.Novell-SNAPE.Novell-FDDI.Ans:A,B&CNovellsIPXandCiscosIOSnametheirprotocolsdifferently.CiscousessapforEthernet_802.2,Token-Ring,andNovellsFDDI_802.2.CiscousessnapforEthernet_SNAP,Token-Ring_SNAP,andFDDI_SNAP.Ciscou

17、sesarpaforEthernet_IIand,finallythedefaultisNovell-etherforNovellsEthernet_802.3.15sapisusedbytheCiscoIOSforwhichencapsulationtypes?A.Ethernet_802.2B.Token-RingC.FDDI_SNAPD.Ethernet_802.3E.FDDI_802.2AnsA,B&ENovellsIPXandCiscosIOSnametheirprotocolsdifferently.CiscousessapforEthernet_802.2,Token-Ring,

18、andNovellsFDDI_802.2.CiscousessnapforEthernet_SNAP,Token-Ring_SNAP,andFDDI_SNAP.CiscousesarpaforEthernet_IIand,finallythedefaultisNovell-etherforNovellsEthernet_802.3.16WhichtypeofEthernetframingisusedforTCP/IPandAppleTalk?A.Ethernet802.3B.Ethernet802.2C.EthernetIID.EthernetSNAPAnsDEthernet802.3isus

19、edwithNetWareversions2through3.11,Ethernet802.2isusedwithNetWare3.12andlaterplusOSIrouting,EthernetIIisusedwithTCP/IPandDECnet,andEthernetSNAPisusedwithTCP/IPandAppleTalk.17WhichtypeofEthernetframingisusedforTCP/IPandDECnet?A.Ethernet802.3B.Ethernet802.2C.EthernetIID.EthernetSNAPAns:CEthernet802.3is

20、usedwithNetWareversions2through3.11,Ethernet802.2isusedwithNetWare3.12andlaterplusOSIrouting,EthernetIIisusedwithTCP/IPandDECnet,andEthernetSNAPisusedwithTCP/IPandAppleTalk.18YouareasystemadministratoronaNetWarenetwork,youarerunningNetWare4.11andyoucannotcommunicatewithyourrouter.Whatisthelikelyprob

21、lem?A.NetWare4.11defaultsto802.2encapsulation.B.NetWare4.11defaultsto802.3encapsulationC.CiscoroutersonlyworkwithNetWare3.11.D.NetWare3.11defaultsto802.2encapsulation.AnsAThedefaultencapsulationonCiscoroutersisNovellEthernet_802.3andNetWare3.12andlaterdefaultsto802.2encapsulation,3.11andearlierdefau

22、ltsto802.3.19NetWareIPXaddressingusesanetworknumberandanodenumber.Whichstatementsaretrue?A.Thenetworkaddressisadministrativelyassignedandcanbeupto16hexadecimaldigitslong.B.Thenodeaddressisalwaysadministrativelyassigned.C.ThenodeaddressisusuallytheMACaddress.D.IftheMACaddressisusedasthenodeaddress,th

23、enIPXeliminatestheuseofARP.AnsA,C&DThenetworkaddresscanbeupto16hexadecimaldigitsinlength.Thenodenumberis12hexadecimaldigits.ThenodeaddressisusuallytheMACaddress.AnexampleIPXaddressis4a1d.0000.0c56.de33.Thenetworkpartis4a1d.Thenodepartis0000.0c56.de33.Thenetworknumberisassignedbythesystemadministrato

24、roftheNovellnetwork.20WhichNetWareprotocolworksonlayer3-networklayer-oftheOSImodel?A.IPXB.NCPC.SPXD.NetBIOSAnsAIPX(InternetworkPacketExchange)isaNetWarenetworklayer3protocolusedfortransferringinformationonLANs.21WhichNetWareprotocolprovideslink-staterouting?A.NLSPB.RIPC.SAPD.NCPAns:ANetWareLinkServi

25、cesProtocol(NLSP)provideslink-staterouting.SAP(ServiceAdvertisementProtocol)advertisesnetworkservices.NCP(NetWareCoreProtocol)providesclient-to-serverconnectionsandapplications.RIPisadistancevectorroutingprotocol.22Asasystemadministrator,youwanttodebugigrpbutareworriedthatthedebugIPigrptransactionco

26、mmandwillfloodtheconsole.Whatisthecommandthatyoushoulduse?A.debugIPigrpeventB.debugIPigrp-eventsC.debugIPigrpsummaryD.debugIPigrpeventsAnsDThedebugIPigrpeventsisusedtoonlydisplayasummaryofIGRProutinginformation.YoucanappendanIPaddressontoeithercommandtoseeonlytheIGRPupdatesfromaneighbor.23Whatdoesth

27、efollowingseriesofcommandsaccomplish?routerigrp71networkrouterigrp109networkA.Itisolatesnetworksand.B.Itloadsigrpfornetworks109and71.C.ItdisablesRIP.D.Itdisablesallroutingprotocols.AnsAItisolatesnetworkandandassociatesautonomoussystems109and71withIGRP.IGRPdoesnotdisableRIP,bothcanbeusedatthesametime

28、.24Inthecommandrouterigrp109whatdoes109signify?A.anautonomoussystemB.anynetworknumberwhichtherouterisattachedtoC.theallowablelengthoftheroutingtableD.thenetworksocketnumberAnsATheCiscoIOSglobalconfigurationcommandrouterigrpxxxisusedtoconfiguretheInteriorGatewayRoutingProtocol.Inthiscase,the109iscall

29、edtheprocess-id,whichcanalsobeusedforanautonomoussystemnumber.25IGRPsupportsafeaturethatallowstraffictobedistributedamongupto6(4default)pathstoprovidegreateroverallthroughputandreliability.Whatisthiscalled?A.unequal-costloadbalancingB.equal-costloadbalancingC.proportionateloadbalancingD.lowcostloadb

30、alancingAnsAAnunequal-costloadbalancingisusedtoprovidealternatepathsfordatadistributiononaninternetwork.Ciscodevelopedthismethodtouseunusedorunderutilizedlinkstoincreasebandwidthandnetworkavailability.26IGRPusesflashupdates,poisonreverseupdates,holddowntimes,andsplithorizon.Howoftendoesitbroadcastit

31、sroutingtableupdates?A.90secondsB.10secondsC.30secondsD.45secondsAnsA27ThecommandshowIPprotocoldisplayswhichinformation?A.routingtimersB.networkinformationC.contentsoftheIProutingtableD.informationaboutallknownnetworkandsubnetworksAnsA&BshowIPprotocoldisplaysroutingtimersandnetworkinformation.showIP

32、routedisplaystheroutingtablewithinformationaboutallknownnetworksandsubnetworks.28WhenusingRIP,routingupdatesarebroadcastevery_seconds.A.30B.10C.60D.90Ans:ANovellsRIPupdatesroutingtablesevery60seconds,ApplesRTMPisevery10seconds,routersARPevery60seconds,DECnethostsandIGRPsignalevery15seconds,andBanyan

33、VINESsignalsevery90seconds.29Anautonomoussystemcanonlyexistifallroutersinthatsystemmeetwhichcriteria?A.interconnectedB.runthesameroutingprotocolC.assignedsameautonomoussystemnumberD.runIGRPonlyE.runRIPonlyAnsA,B&CAnautonomoussystemisasetofroutersandnetworksunderthesameadministration.Eachroutermustbe

34、interconnected,runthesameroutingprotocol,andassignedthesameautonomoussystemnumber.ThenetworkInformationCenter(NIC)assignsauniqueautonomoussystemnumbertoenterprises.30Adefaultrouteisanalogoustoa_.A.defaultgatewayB.staticrouteC.dynamicrouteD.one-wayrouteAns:AAdefaultrouteisanalogoustoadefaultgateway.I

35、tisusedtoreducethelengthofroutingtablesandtoprovidecompleteroutingcapabilitieswhenaroutermightnotknowtheroutestoallothernetworks.31Routerscanlearnaboutdestinationsthroughstaticroutes,default,ordynamicrouting.Bydefault,arouterwilluseinformationderivedfrom_.A.IGRPB.RIPC.IPD.TCPAnsAThequalityofinformat

36、ionisrated:Connectedinterface0Staticroute1IGRP100RIP120Unknown255Thelowerthevalue,themorereliablethesourcewith255signifyinginformationthattherouterwillignore.So,therouterwilluseIGRP,ratedat100,beforeRIP,ratedat120.32Youareloggedintoarouter,whatcommandwouldshowyoutheIPaddressesofroutersconnectedtoyou

37、?A.showcdpneighborsdetailB.showrunC.showneighborsD.showcdpAnsA33Asasystemadministrator,youperformanextendedpingattheprivilegedEXECprompt.Aspartofthedisplay,youseeSetDFbitinIPheader?yes:Whatwouldhappenifyouanswerednoattheprompt.A.Thisletstherouterfragmentthepacket.B.Ittellstherouternottofragmentthepa

38、cket.C.Thisletstherouterdirectthepackettothedestinationitfindsinitsroutingtable.D.Ittelltheroutertosendthepackettothenexthoprouter.AnsASetDFbitinIPheader?isaresponsetoanextendedpingattherouter.Ifyouansweryes(thedefault)therouterwillnotfragmentthepacket.Ifyouanswerno,therouterwillfragmentthepacket.34

39、Youhavetypedpingandgetthefollowingdisplay:Typeescapesequencetoabort.Sending5,100-byteICMPEchoesto,timeoutis2seconds:.!Whatdoesthe.signify?A.Thatonemessagetimedout.B.Thatallmessagesweresuccessful.C.Thatonemessagewassuccessful.D.Thatonemessagecompletedinundertheallottedtimeframe.AnsAThepossiblerespons

40、esfromthepingcommandare:!Successfulreceiptofanechoreply.TimedoutwaitingforareplyUDestinationunreachableCCongestion-experiencedpacketIPinginterrupted?Packettypeunknown&PacketTTLexceeded35Whichcommand,thatisusedtotestaddressconfiguration,usesTime-To-Live(TTL)valuestogeneratemessagesfromeachrouter.A.tr

41、aceB.pingC.telnetD.bootpAns:ATheCiscoIOSEXECcommandtraceprotocoldestinationisusedtodiscoverroutesthatpacketswilltraveltotheirdestinationhosts.TraceusesTTL(TimetoLive)valuestoreportdestinationrouteinformation.36WhatdoesthecommandIPname-server55accomplish?A.Itsetsthedomainnamelookuptobealocalbroadcast

42、.B.Thisisanillegalcommand.C.Itdisablesdomainnamelookup.D.ThecommandisnowdefunctandhasbeenreplacedbyIPserver-nameipanyAnsABydefaultDNSisenabledonarouterwithaserveraddressof55,whichprovidesforalocalbroadcast.37Asasystemadministrator,youneedtoprovideyourrouterswithaDomainNameSystem(DNS)server.HowmanyDN

43、Sserverscanyouspecifywithonecommand?A.6B.1C.2D.4AnsAYoucanonlyspecifysixnameserversinonecommand.ThesyntaxisIPname-serverserver-address1server-address2.server-address6.YoumustalsoenableDNS.38HowwouldyouconfigureonehostnamethatpointstotwoIPaddresses?A.IPhostjacobB.IPjacobC.IPhostjacobD.IPhostduplicate

44、allAnsAThecorrectsyntaxisIPhostnameTCP-port-numberaddressaddressSo,IPhostP1Risthecorrectchoice.IPhostjacobonlypointsthehostnamejacobtooneIPaddress-.39ThefollowingselectionsshowthecommandpromptandtheconfigurationoftheIPnetworkmask.Whichtwoarecorrect?A.Router#termIPnetmask-formatbitcount|decimal|hexad

45、ecimalB.Router(config-if)#IPnetmask-formatbitcount|decimal|hexadecimalC.Router(config-if)#netmask-formatbitcount|decimal|hexadecimalD.Router#ipnetmask-formatbitcount|decimal|hexadecimalAnsA&BRouter#termIPnetmask-formatbitcount|decimal|hexadecimalandRouter(config-if)#IPnetmask-formatbitcount|decimal|

46、hexadecimalarecorrect.Youvaluestoreportdestinationrouteinformation.36WhatdoesthecommandIPname-server55accomplish?A.Itsetsthedomainnamelookuptobealocalbroadcast.B.Thisisanillegalcommand.C.Itdisablesdomainnamelookup.D.ThecommandisnowdefunctandhasbeenreplacedbyIPserver-nameipanyAnsABydefaultDNSisenable

47、donarouterwithaserveraddressof55,whichprovidesforalocalbroadcast.37Asasystemadministrator,youneedtoprovideyourrouterswithaDomainNameSystem(DNS)server.HowmanyDNSserverscanyouspecifywithonecommand?A.6B.1C.2D.4AnsAYoucanonlyspecifysixnameserversinonecommand.ThesyntaxisIPname-serverserver-address1server

48、-address2.server-address6.YoumustalsoenableDNS.38HowwouldyouconfigureonehostnamethatpointstotwoIPaddresses?A.IPhostjacobB.IPjacobC.IPhostjacobD.IPhostduplicateallAnsAThecorrectsyntaxisIPhostnameTCP-port-numberaddressaddressSo,IPhostP1Risthecorrectchoice.IPhostjacobonlypointsthehostnamejacobtooneIPad

49、dress-.39ThefollowingselectionsshowthecommandpromptandtheconfigurationoftheIPnetworkmask.Whichtwoarecorrect?A.Router#termIPnetmask-formatbitcount|decimal|hexadecimalB.Router(config-if)#IPnetmask-formatbitcount|decimal|hexadecimalC.Router(config-if)#netmask-formatbitcount|decimal|hexadecimalD.Router#

50、ipnetmask-formatbitcount|decimal|hexadecimalAnsA&BRouter#termIPnetmask-formatbitcount|decimal|hexadecimalandRouter(config-if)#IPnetmask-formatbitcount|decimal|hexadecimalarecorrect.Youcanconfigurethemaskforthecurrentsessionandyoucanconfigureitforaspecificline.40WhenconfiguringthesubnetmaskforanIPadd

51、ress,whichformatscanbeused?A.dotted-decimal.B.HexadecimalC.Bit-countD.OctalE.BinaryAnsA,B&Cthesubnetmask,addressclass,subnetaddress,andbroadcastaddress.A.28,B,27B.28,C,27C.28,C,27,D.24,C,27AnsADeterminethesubnetmask,addressclass,subnetaddress,andbroadcastaddress.A.52,B,2,5B.52,C,2,5C.52,B,5,2D.48,B,

52、2,5AnsAthesubnetmask,addressclass,subnetaddress,andbroadcastaddress.A.,A,55B.,B,55C.,A,55,D.,A,55AnsA44YouhaveanIPhostaddressof21andasubnetmaskof48.Whatisthebroadcastaddress?A.27B.20C.21D.22AnsATheeasiestwaytocalculatethisistosubtract48(subnetmask)from55,thisequals7.Converttheaddress21tobinary-11001

53、001110111100000010101111001.Convertthemask48tobinary-11111111111111111111111111111000.ANDthemtogethertoget:11001001110111100000010101111000or.120isthesubnetaddress,add7tothisaddressfor27orthebroadcastaddress.21through26arethevalidhostaddresses.45Giventheaddress20andthesubnetmaskof.Howmanyhostsareava

54、ilable?A.254B.510C.126D.16,372AnsA172.16.2120isastandardClassBaddresswithasubnetmaskthatallows254hosts.YouareanetworkadministratorandhavebeenassignedtheIPaddressof.Youneedtohave20subnetswith5hostspersubnet.Thesubnetmaskis48.46Whichaddressesarevalidhostaddresses?A.7B.8C.6D.9E.1AnsA,B&DSubnetaddresses

55、inthissituationareallinmultiplesof8.Inthisexample,6isthesubnet,1isthebroadcastaddress.TherestarevalidhostIDsonsubnet6.47YouareanetworkadministratorandhavebeenassignedtheIPaddressof.Youneedtohave20subnetswith5hostspersubnet.Whatsubnetmaskwillyouuse?A.48B.28C.92D.40AnsAByborrowing5bitsfromthelastoctet

56、,youcan.have30subnets.Ifyouborrowedonly4bitsyoucouldonlyhave14subnets.Theformulais(2tothepowerofn)-2.Byborrowing4bits,youhave(2x2x2x2)-2=14.Byborrowing5bits,youhave(2x2x2x2x2)-2=30.Toget20subnets,youwouldneedtoborrow5bitssothesubnetmaskwouldbe48.48YouaregiventheIPaddressof60withasubnetmaskof.Whatist

57、henetworkaddressinbinary?A.1010110000010000B.0000001010100000C.1010110000000000D.1110000011110000Ans:ATofindthenetworkaddress,converttheIPaddresstobinary-101011000001000000000001010100000-thenANDeditwiththesubnetmask-11111111111111110000000000000000.Therestis10101100000100000000000000000000,whichisi

58、ndecimal.Thefirstoctetrulestatesthattheclassofanaddresscanbedeterminedbythenumericalvalueofthefirstoctet.49WhichaddressesareINCORRECTLYpairedwiththeirclass?A.128to191,ClassBB.192to223ClassBC.128to191,ClassCD.192to223,ClassCAnsB&CAddressclassesare:1to126,ClassA;128to191,ClassB,192to223,ClassC;224to23

59、9,ClassD;and240to255,ClassE.Thefirstoctetrulestatesthattheclassofanaddresscanbedeterminedbythenumericalvalueofthefirstoctet.50WhichaddressesareINCORRECTLYpairedwiththeirclass?A.1to126,ClassAB.128to191,ClassAC.1to126,ClassBD.128to191,ClassBAns:B&C.Addressclassesare:1to126,ClassA;128to191,ClassB,192to

60、223,ClassC;224to239,ClassD;and240to255,ClassE.Thefirstoctetrulestatesthattheclassofanaddresscanbedeterminedbythenumericalvalueofthefirstoctet.51WhichaddressesareINCORRECTLYpairedwiththeirclass?A.240-255,ClassDB.240-255,ClassEC.224-239,ClassDD.224-239,ClassEAnsA&DAddressclassesare:1to126,ClassA;128to