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1)Whatwerethetwochallengesofcreatinganetworkmodel(Selecttwo)(创建网络模型所遇到的两个挑战是什么(选择2个))？A.interconnectivityB.interactionC.internetworkingD.interoperabilityA，D。互通性和互操作性创建网络模型的挑战。2)TheAdvancedResearchProjectsAgencycreatedwhatnetwork(高级研究计划局(ARPA)创建了什么网络)？A.EthernetB.FDDIC.ARPANETD.TokenRingC。ARPANET由DARPA项目创建。3)WhatdoesOSIstandfor(OSI代表什么)？A.OrganizationforStandardsInstituteB.OrganizationforInternetStandardsC.OpenStandardsInstituteD.OpenSystemsInterconnectionD。OSI代表开放系统互连。4)WhatarethelayersoftheOSIreferencemodel,inorder(OSI参考模型有哪些层，按顺序回答)？A.application,transport,network,physicalB.application,presentation,session,network,transport,datalink,physicalC.application,presentation,session,transport,network,datalink,physicalD.application,session,transport,physical5)Whatisthetermforwrappingadataunitwithaheaderandpassingittothenextprotocol(用报头包装一个数据信元并传递到下一个协议，代表这个过程的术语是什么)？A.WindowingB.EncapsulationC.WrappingD.Heading6)WhichofthefollowingisnotdefinedatthephysicallayeroftheOSIreferencemodel(在OSI参考模型的物理层中没有定义下面的哪一个)？A.hardwareaddressesB.bitstreamtransmissionC.voltagelevelsD.physicalinterface7)Whichstandardsinstitutecreatedthe802seriesofphysical/datalinklayerstandards(哪个标准协会创建了物理/数据链路层标准的802系列)？A.ANSIB.DIXC.ITU-TD.IEEE8)WhocreatedEthernet(谁创建了Ethernet)？A.ANSIB.DIXC.ITU-TD.IEEE9)WhatisthefunctionofCSMA/CD(CSMA/CD的功能是什么)？A.ItpassesatokenaroundastartopologyB.NodesaccessthenetworkandretransmitiftheydetectacollisionC.Nodesconnecttoadualringoffiber-opticsanduseatoken-passingschemeD.Nodesbreaktheframesintotinycellsandforwardthemthroughacell-switchingnetwork.10)Whatisabackoffalgorithm?(什么是补偿算法)？A.ItisthefaulttolerancecalculationforFDDIB.ItisaroutingcalculationfordeterminingthebestrouteC.ItisthenotificationthataseriouserrorhasoccurredonthenetworkD.Itisthedurationcalculationtodelayretransmissionafteracollision,beforeretransmittinginEthernet.11)IBM’sTokenRingspecificationisnearlyidenticalandcompatiblewithIEEE’s802.5specification(IBM的令牌环网规范几乎和IEEE的802.5规范一样而且兼容)。A.TrueB.False12)Whatisbeaconing(什么是信标)？A.ItisthefaulttolerancecalculationforFDDIB.ItisaroutingcalculationfordeterminingthebestrouteC.ItisthenotificationthataseriouserrorhasoccurredonthenetworkD.Itisthedurationcalculationtodelayretransmissionafteracollision,beforeretransmittinginEthernet13)WhattwotypesofframesarefoundonaTokenRingnetwork(在令牌环网中可以找到哪两种类型的帧)？A.TokenB.FramechecksequenceC.DataD.Address14)TheFDDIspecificationincludeswhichlayersoftheOSIreferencemodel(FDDI规范包含OSI参考模型的哪层)？A.PhysicalandnetworkB.PhysicalandtransportC.PhysicalandMACsublayerofdatalinkD.Physicalanddatalink15)WhatisRS-232(什么是RS-232)？A.AstandardserialportinterfaceB.Ahigh-speedserialinterfaceC.AnISDNinterfaceD.AnATMswitch16)WhatisthemaximumdatatransmissionrateforHSSI(什么是HSSI的最大数据传输速率)？A.64KbpsB.256KbpsC.100MbpsD.52Mbps17)Whatdoesthehierarchicalnetworklayeraddressprovide(层次式网络层地址提供了什么)？A.ThehardwareaddressB.ThenodeaddressandthehardwareaddressC.ThenetworkaddressandthenodeaddressD.Thenetworkaddressmappedtothehardwareaddress18)WhatqualitiesmatchTCP(TCP具有哪些特点)？A.connectionless,reliableB.connection-oriented,reliableC.connectionless,unreliableD.connection-oriented,unreliable19)WhatlayeroftheOSIreferencemodelspecifiesdataformats,suchasencryption(OSI参考模型的哪层规定了数据格式。例如加密)？A.applicationB.presentationB.sessionD.transportE.networkF.datalinkG.physical20)Whatisout-of-bandmanagement(什么是带外管理)？A.ItistheabilitytomanageaswitchorhubfromanetworkedworkstationB.ItistheadditionofanetworkmanagementmoduletoahubC.ItisthefaulttolerancefeatureofthedualringFDDIcreatingasingleringD.Itistheabilitytomanageadeviceusingaconnectionotherthanthenetwork.21)Interoperabilitymeans(互操作性的含义)：A.TransferofdatabetweensystemsB.Abilitytomakedataunderstandablebymachinesthatusedifferentoperatingsystems,hardwareorlanguages.C.AgreementbetweentwoequipmentvendorsforprocessingdataD.AbilityofLANtocommunicatewithWAN22)OSIiswhatkindofstandard(OSI是何种类型的标准)？A.astandardcreatedbymajortelecommunicationsserviceprovidersB.adefactostandardC.adejurestandardD.astandardcreatedbymajorequipmentmanufacturers23)ThelayeredapproachoftheOSIresultsin(OSI的分层方法的结果是)：A.IncreaseddevelopmentcostsforaspecificvendorproductB.IncreasedmarketabilityforaspecificvendorproductC.AhierarchicaltoolfornetworkarchitectureD.AlloftheaboveE.B&ConlyF.A&Conly24)Whichofthefollowingstatementsistrueingeneralwhenanapplicationatthesourcewishestosenddatatoanapplicationatthedestinationaddress(当源端的一个应用程序希望发送数据到目的地址的另一个应用程序时，下面的哪些陈述一般是正确的)？A.ThelowerlayeratdestinationaddsitsownheaderinformationtothedataitreceivesfromthehigherlayerB.ThelowerlayeratsourceaddsitsownheaderinformationtothedataitreceivesfromthehigherlayerC.ThelowerlayeratdestinationstripsheaderinformationfromthedataaddedbythehigherlayerD.Thehigherlayeratsourcestripsheaderinformationaddedtothedatabythelowerlayer25)IntheOSImodel,encapsulationofthedatamayoccurat(在OSI模型中，数据的封装发生在)：A.Layer7ofthesourceB.Layer1ofthedestinationC.Layer7ofthedestinationD.AlllayersatsourceE.Layer1ofthesource26)ThesessionlayerfunctionalityintheOSImodelisusuallyimplemented(OSI模型中的会话层功能通常如何实