CCNA考试自测题第1卷及答案.docx
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CCNA考试自测题第1卷及答案.docx
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CCNA考试自测题第1卷及答案
CCNA考试自测题第1卷及答案
下面的问题将帮助你评价你在本章中学习到的内容。
仔细阅读所有的选项,因为正确答案可能多于1个。
选择每个问题中所有的正确答案。
1)Matchthefollowingapplicationlayerservicestotheircorrespondingtransportlayerprotocolport.(匹配下列的应用层服务和它们对应的传输层协议端口):
A.SMTP1.TCP/23
B.FTP2.TCP/25
C.TFTP3.TCP/80
D.Telnet4.TCP/21
E.HTTP5.UDP/69
F.DNS6.TCP/53
2)WhichOSIreferencemodellayerdoesTelnetfunctionat(Telnet在哪一个OSI参考模型层运作)?
A.Transport
B.Network
C.Session
D.Application
3)HowmanylayersdoestheTCP/IPprotocolsuitehave,comparedtotheOSIreferencemodel(和OSI参考模型相比,TCP/IP协议具有几层)?
A.TCPmodelhas4,OSImodelhas6
B.TCPmodelhas7,OSImodelhas8
C.TCPmodelhas4,OSImodelhas7
D.TCPmodelhas7,OSImodelhas4
4)TheTCP/IPprotocolsuitehasaformalsessionlayerthatincludesNetBIOS、RPCsandTLIfunctions(TCP/IP协议套件具有包含NetBIOS、RPC和TLI功能的一个正式的会话层)。
A.True
B.False
5)WhatisthefunctionofRPCs(RPC的功能是什么)?
A.TomovefilesfromremotePCstoalocalPC
B.Tomakeremotefunctioncallstransparent,sotheyappeartobelocal
C.ToinitializeaprogramonaremotePC
D.Tosendaprocedurethatislocaltoaremotenodeforprocessingelsewhere
6)WhatdoesRPCstandfor(RPC代表什么)?
A.Remotepersonalcomputer
B.Reserved-programmingcall
C.Routed-procedurecall
D.Remote-procedurecall
7)WhatOSIreferencemodellayerdosocketsfunctionat(套接字在OSI参考模型的哪层运作)?
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.Datalink
G.Physical
8)Whatfunctiondosocketsperform(套接字的功能是什么)?
A.Theymakeremotefunctionsappearlocal,transparenttotheuser
B.Theytransferfilestoandfromremotenodes
C.Theymakethetransportlayerindependent
D.Theyallowmultipleapplicationstosharethesameconnectiontothenetwork
9)WhatisWinSock(什么是WinSock)?
A.AversionofsocketsfortheMicrosoftWindowsplatform
B.SocketsonBSDUNIX
C.AsessionlayerAPIcommonlyconsideredtobeitsownprotocol
D.AnetworklayerserviceforMicrosoftWindows
10)WhatdoesTLIdo(TLI的作用是什么)?
A.Itmakesremotefunctionsappearlocal,transparenttotheuser
B.Ittransfersfilestoandfromremotenodes
C.Itmakesthetransportlayerindependent
D.Itallowsmultipleapplicationstosharethesameconnectiontothenetwork
11)WhatOSIlayerdoesNetBIOSfunctionat(NetBIOS在OSI哪一层运作)?
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.DataLink
G.Physical
12)WhichprotocolscanNetBIOSbindto?
(Selectallthatareapplicable.)(NETBIOS可以绑定在哪个协议上,选择所有可能的协议)?
A.Appletalk
B.IPX
C.IP
D.NetBEUI
13)WhatlayersdonotexistintheTCP/IPmodelthatareintheOSImodel(哪层不在TCP/IP模型中,但它在OSI模型中)?
A.Application,presentation,andnetwork
B.Presentation,session,anddatalink
C.Session,network,andphysical
D.Presentation,datalink,andphysical
14)Whatisasocketinthetransportlayer(传输层中的套接字是什么)?
A.ThesocketisanIPaddressplusaport
B.AnAPIthatmakesthetransportlayerindependent
C.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
D.Afunctionthatmakesremoteproceduresappeartobelocal
15)Whatisaport(什么是端口)?
A.AnAPIthatmakesthetransportlayerindependent
B.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
C.Afunctionthatmakesremoteproceduresappeartobelocal
D.Thepointwhereupper-layerprocessesaccesstransportlayerservices
16)Whichofthefollowingservicesusesaprocesscalledwindowing(下面的哪一个服务使用了所谓的窗口机制)?
A.Reliabledatatransfer
B.Connection-orientedvirtualcircuit
C.Bufferedtransfer
D.Resequencing
E.Multiplexing
F.Efficient,full-duplextransmission
G.Flowcontrol
17)WhatisUDP(什么是UDP)?
A.AnAPIthatmakesthetransportlayerindependent
B.Aconnectionless,unreliabletransportprotocol
C.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
D.Afunctionthatmakesremoteproceduresappeartobelocal
18)WhatisIP(什么是IP)?
A.Itisthetransportmechanismforupperlayerservices
B.ItisthesessionlayerAPIformakingthetransportlayerindependent
C.Itisthenetworklayerprotocolthatmovesdatafromonenodetoanother
D.ItisthephysicallayerprotocolforInternetconnections
19)WhatisICMP(什么是ICMP)?
A.Itisanetworklayerprotocolthathandlescontrolmessages
B.Itisanetworklayerprotocolthatresolvesaddresses
C.ItisasessionlayerAPIthatmakesremoteprocedurestransparenttoauser
D.Itisatransportlayerfunctionforunreliabletransport
20)PingsendsanICMPechocommandtoanIPaddressinordertodeterminewhetheranetworkconnectionexiststothatnode(Ping向一个IP地址发送了一个ICMP回送命令,目的是确定是否存在到那个节点的网络连接)?
A.True
B.False
21)WhichofthefollowingbestdescribesTCP/IP(下面的哪句话最准确地说明了TCP/IP)?
A.Astaticprotocol
B.Aproprietaryprotocol
C.Acollectionofinternetworkingprotocols
22)UDPandTCPrepresentmechanismsusedbywhichlayeroftheTCP/IP(UDP和TCP表示了TCP/IP的哪层使用的机制)?
A.Datalinklayer
B.Physicallayer
C.Presentationlayer
D.Transportlayer
23)RPCsprovidewhichofthefollowing(RPC提供了下面的哪个功能)?
A.Connection-orientedsession
B.Transparencytomakeremotecallslooklocal
C.Portabilityofapplicationsbetweenheterogeneoussystems
D.AandConly
E.BandConly
F.A,B,andC
24)DistributedComputingEnvironment(DCE)isanexampleof(分布式计算环境(DEC)是下面的哪一项的一个例子)?
A.OSImodel
B.RPCimplementation
C.ExtremeDataRepresentation
D.AandB
25)WhichstatementistrueofWinSock(下面对WinSock的哪一句陈述是正确的)?
A.ItisaMACapplication
B.Itrepresentsagraphicaluserinterface
C.Itrepresentsanetworklayer
D.ItprovidesthemeansforsharinganInternetconnectionbetweenmultipleIPprotocol suiteutilities
26)WhichstatementistrueofTLI(下面关于TLI的哪一句陈述是正确的)?
A.ItisalayerintheOSImodel
B.ItisalayerintheTCP/IPmodel
C.ItisaSystemVAPI
D.ItispartoftheUNIXKernel
27)WhichstatementistrueofWindowsNameServer(WINS)(下面对于Windows命名服务器(WINS)的陈述中,哪一句是正确的)?
A.Itisaprotocol
B.Itprovidescapabilityfornameresolution
C.Itisanetworklayer
D.Itisaproprietarynameserver
E.A,B,andDonly
F.BandDonly
28)ICMP、IP、ARPandRARPoftheIPprotocolsuitemapto(IP协议套件的ICMP、IP、ARP和RARP映射到):
A.OSIlayers1and2
B.OSIlayer5
C.OSIlayer3
D.OSIlayer2
29)Whichlayerismostimportantinprovidingreliabledataexchangebetweentwosystems(在两个系统之间提供可靠的数据交换中,哪一层是最重要的)?
A.Physicallayer
B.Datalinklayer
C.Sessionlayer
D.Transportlayer
30)WhichofthefollowingdoesTCPprovide(TCP提供了下面的哪一个功能)?
A.Unreliabledatastream
B.Connectionlessvirtualcircuit
C.Flowcontrol
D.Structuredbytestreammovement
31)Ofthefollowing,whichfieldisnotapartoftheTCPheader(在下面各项中,哪一个字段不是TCP报头的一部分)?
A.Subnetmask
B.Sequencenumber
C.Dataoffset
D.Destinationport
32)WhatisthesequencenumberinaTCPheaderusedfor(在TCP报头中的顺序号的作用是什么)?
A.Acknowledgments
B.Reorderingoftheoctetsreceived
C.Rejectingduplicateoctets
D.Alloftheabove
33)VariableslidingwindowsprovideanexplicitmechanismfornotifyingTCPifanintermediatenode(forexample,arouter)becomescongested(在中间节点,例如一个路由器拥塞的情况下,可变滑动窗口提供了通知TCP的显式机制)。
A.True
B.False
34)WhichofthefollowingparametersisnotapartofUDPheader(下面的哪一个参数不是UDP报头的一部分)?
A.Sourceport
B.Urgentpointer
C.Checksum
D.Length
E.Destinationport
35)WhenarouterhasbeenconfiguredforUDPflooding,thesourceaddressmightchange,butthedestinationaddresswillnotchangeasthedatagrampropagatesthroughthenetwork(当一个路由器已经配置为UDP泛洪时,当数据报在网络上传播的过程中,源地址可能改变,但是目的地址不会改变)?
A.True
B.False
36)Thespanning-treealgorithmallows(生成树算法允许):
A.Forwardingofpacketswithnocontrol
B.Forwardingofbroadcaststoaninterfacewhichalreadyhasreceivedthebroadcast
C.Preventionofduplicationofforwardingofpackets
D.AandBonly
37)IPhelperaddressesareaformof______________addressingandrequirethecommandspecificationof_________oneveryinterfacereceivingbroadcaststhatneedtobeforwarded(IP辅助地址是一种什么类型的寻址方法,在每一个接收到需要转发的广播接口上需要什么命令说明)?
A.Static/IPheaderaddress
B.Dynamic/IPforward-protocolUDP
C.Dynamic/IPforward-protocolTCP
38)Whichofthefollowingprotocolsprovideaddressresolution(下面的哪一个协议提供了地址解析)?
A.ICMP
B.RARP
C.IP
D.UDP
E.TCP
39)IPisdescribedasanunreliablemechanismbecauseitdoesnotguaranteedelivery(IP被认为是不可靠的机制,因为它不保证发送)。
A.True
B.False
40)WhatdoesfragmentationinTCP/IPrepresent(在TCP/IP中的分段代表什么)?
A.Segmentingofdatagramsinto53-bytepacketsforATMapplications
B.Divisionoflargerdatagramsintoconvenientsizepackets
C.Aprocessthatoccursonarouter
D.A,B,andC
E.AandConly
F.BandConly
41)WhichofthefollowingstatementsistrueofARP(下面对ARP的陈述中,哪一个是正确的)?
A.ItmakesaMACaddresslogicallyindependentofthephysicalhardware
B.ItmakesitnecessaryfortheadministratortophysicallymanagetheMACad
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