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1、2001年1月自考互联网及其应用试题（January2001selftaughtInternetanditsapplicationtestquestions）Thefirstpartofthemultiple-choicequestion(20points)Asinglechoice(thetitleof20items,eachitemof1points,atotalof20points)infouroptionsforeachitemlistedinonlyoneisinlinewiththerequirementsofthesu
2、bject,pleasefillinthecodeafterthetitleinbrackets.Nochoiceornochoice.1.inthecomputernetwork,allthecomputersareconnectedtoacommunicationtransmissionline,andthereisadevicetopreventsignalreflectionatbothendsoftheline.Thisconnectionstructureiscalled()A,B,Cbusstructure,rings
3、tructureofstarstructure,Dnetworkstructure2.inthesevenlayeroftheOSIreferencemodel,theequipmentisconnectedtothethirdlayerabovethenetworkis()A,B,C,gatewayhub,repeaterbridgeD3.IPaddressisa32bitbinarynumber,itusuallyusesthepoint()A,B,octalbinarynumberrepresentation,saidCD,s
4、aidthedecimalnumbersixteenhexadecimalnumberrepresentationIn4.TCP/IPprotocols,UDPprotocol(in)A,B,Capplicationlayertransportlayernetworklayer,networkinterfacelayer,D5.intheIPaddressscheme,159.226.181.1isa()A,aBclassBaddress,Caddress,Caddress,DDaddress6.dividethenetwork20
5、2.112.78.0intomultiplesubnets(subnetmaskis255.255.255.192),thenthetotalnumberofhostaddressesavailableineachsubnetis()A,254B,252C,128D,1247.intheInternetdomainnamesystem,thedomaincanbedividedintosubdomains,domainnamesareseparatedbydots,accordingto()A,fromlefttoright,mor
6、eandmoresmallwayisdividedinto4layersB,fromlefttoright,moreandmoresmalldividedmultilayerarrangementC,fromrighttoleftmoreandmoresmallwayisdividedinto4layersD,fromrighttoleftmoreandmoresmalldividedmultilayerarrangement8.computeraccesstoInternet,canbeconnectedthroughthepub
7、lictelephonenetwork.UserswhoconnectinthiswayandassignatemporaryIPaddresstotheconnectionareusuallyused()A,B,simulationterminaldial-upconnectionthroughLANconnectionwayC,D,SLIP/PPPprotocolconnectionviathepacketnetworkconnectionmode9.onthemodem,theindicatorlightthatindicat
8、esthatthedeviceisreadytoreceiveinformationfromtheconnectedcomputeris()A,CTSB,RDC,DTRD,DCD10.inthe10BaseTEthernet,twis
