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1、1.PDUsattheNetworklayeroftheOSIarecalledwhat?A.TransportB.FramesC.PacketsD.Segments2.Whichtwostatementsaboutareliableconnection-orienteddatatransferaretrue?A.Receivinghostsacknowledgereceiptofdata.B.Whenbuffersarefull,packetsarediscardedandarenotretransmitted.C.Windowingisused
2、toprovideflowcontrolandunacknowledgeddatasegments.D.Ifthetransmittinghost’stimerexpiresbeforereceiptofanacknowledgment,thetransmittinghostdropsthevirtualcircuit.3.PDUsattheDataLinklayerarenamedwhat?A.TransportB.FramesC.PacketsD.Segments4.Segmentationofadatastreamhappensatwhich
3、layeroftheOSImodel?A.PhysicalB.DataLinkC.NetworkD.Transport5.YouwanttoinstallaWirelessnetworkinyourcorporateoffice,andneedgoodspeedbutnotmorethenabout250feetofrange.Whichofthefollowingwirelesstechnologiesshouldyouinstall?A.NarrowbandB.NarrowbandPCSC.BroadbandPCSD.InfraredE.Spr
4、eadSpectrum6.WhichlayeroftheOSIprovidestranslationofdata?A.ApplicationB.PresentationC.SessionD.TransportE.DataLink7.Whendataisencapsulated,whichisthecorrectorder?A.Data,frame,packet,segment,bitB.Segment,data,packet,frame,bitC.Data,segment,packet,frame,bitD.Data,segment,frame,p
5、acket,bit8.Whichofthefollowingisnotanadvantageofalayeredmodel?A.Allowsmultiple-vendordevelopmentthroughstandardizationofnetworkcomponentsB.AllowsvarioustypesofnetworkhardwareandsoftwaretocommunicateC.AllowschangestooccurinalllayerswithouthavingtochangejustonelayerD.Preventscha
6、ngesinonelayerfromaffectingotherlayers,soitdoesnothamperdevelopment9.Whataretwopurposesforsegmentationwithabridge?A.Addmorebroadcastdomains.B.Createmorecollisiondomains.C.Addmorebandwidthforusers.D.Allowmorebroadcastsforusers.10.Whatdoestheterm“Base”indicatein100BaseTX?A.Thema
7、ximumdistanceB.ThetypeofwiringusedC.ALANswitchmethodusinghalfduplexD.Asignalingmethodforcommunicationonthenetwork11.Whatisthemaximumdistanceof100BaseT?A.100feetB.1000feetC.100metersD.1000meters12.WhichofthefollowingwoulddescribeaTransportlayerconnectionthatwouldensurereliabled
8、elivery?A.RoutingB.AcknowledgmentsC.SwitchingD.Systemauthenti
