寧波大學(xué)計算機網(wǎng)絡(luò)習(xí)題集

..1.Incommunicationlinks,transmissionratemeans：A、BandwidthB、propagationspeedC、processspeedD、routerdelays正確答案：A2.AllcommunicationactivitiesinInternetaregovernedby:A、ProtocolsB、WebMasterC、ClientD、ChinaTelecom正確答案：A3.Thecenterofinternetstructureis:A、Tier-1ISPsB、LocalISPsC、RootDNSD、NAP正確答案：A4.Whencongestoccurinnetwork,whichdelaybecomelarge?A、propagationdelayB、queuingdelayC、transmissiondelayD、processingdelay正確答案：B5.Theinternetprotocolsnotdefine：A、orderofmessagesB、actionstakenC、formatD、price正確答案：D6.Theinternetprotocolsnotdefine：A、actionstakenB、orderofmessagesC、hackerD、format正確答案：C7.WhichisnotthetypesofprotocoldataunitinTCP/IP?A、frameB、datetimeC、segmentD、message正確答案：B8.Whichisnotaconnectedendsystemdeviceintheinternet?A、MobilePhoneB、PCserverC、PCworkstationD、Router正確答案：D9.Allcommunicationactivitiesinnetworkaregovernedby:A、ProtocolsB、ServersC、GovernmentD、Clients正確答案：A10.ForQueueingdelay,inwhichstate,averagequeuingdelaysmall:A、La/R=0.1B、La/R=0.9C、La/R>1D、La/R>10正確答案：A1應(yīng)用層中的數(shù)據(jù)塊常被稱為:A、比特流B、幀C、分組D、消息正確答案：D2在TCP/IP層次協(xié)議中,傳輸層向應(yīng)用層提供的接口是哪一個?A、PutB、PortC、SocksD、Socket正確答案：D3下列哪一組協(xié)議屬于應(yīng)用層協(xié)議？A、ICMP,RARP,ARPB、FTP,SMIP,TELNETC、ARP,IP,UDPD、IP,TCP,UDP正確答案：B4在互聯(lián)網(wǎng)WEB應(yīng)用中以下哪一項扮演了控制角色?A、HTML語言B、Web客戶端C、協(xié)議D、Web服務(wù)器正確答案：C5下面哪一個特征是協(xié)議所不具備的:A、面向?qū)ο驜、客服機/服務(wù)器C、無連接D、無狀態(tài)正確答案：C6IE8.0瀏覽器默認(rèn)使用的超文本傳輸協(xié)議是哪一個版本?A、WEB2.0B、1.0C、1.1D、2.0正確答案：C7在協(xié)議中,每一個對象的地址都可以標(biāo)識為：A、UDPB、UMLC、UTPD、URL正確答案：D8需要瀏覽器在每一個請求中遞交認(rèn)證信息,這是因為協(xié)議的哪一個特性？A、面向連接B、無連接C、分布式D、無狀態(tài)正確答案：D9在互聯(lián)網(wǎng)WEB應(yīng)用中連接由以下哪一方發(fā)起?A、HTML語言B、Web客戶端C、協(xié)議D、Web服務(wù)器正確答案：B10Processesrunningindifferenthostscommunicatewithan:A、slottedALOHAprotocolB、InternetroutingprotocolC、application-layerprotocolD、interprocesscommunication正確答案：C1Whatisthedefaultpersistentmodelin/1.1:A、NonpersistentwithpipeliningB、PersistentwithpipeliningC、PersistentwithoutpipeliningD、Nonpersistent正確答案：B2Whichversionofhypertexttransferprotocolareusedindefaultmodenow?A、WEB2.0B、1.0C、1.1D、0.9正確答案：C3Theserverworksonwhichport:A、TCPportabove65535B、UDP80C、TCPportabove1024D、TCP80正確答案：D4messages<application-layerprotocolmessages>exchangedbetweenbrowser<client>andWebserver<server>with:A、IGMPB、ICMPC、UDPD、TCP正確答案：D5Theclientworksonwhichport:A、TCPportabove65535B、UDP80C、TCPportabove1024D、TCP80正確答案：C6Toindicatesendofmessagein,wecanuse:A、/bodyB、/htmlC、\ln\lf.\ln\lfD、\ln\lf正確答案：D7Whichconnectionscanbeusedby/1.1indefaultmode?A、p2pconnectionsB、udpconnectionsC、non-persistentconnectionsD、persistentconnections正確答案：D8WWWserversorganizeinformationinto:A、WEBpagesB、RelationalDatabaseC、DistributedhypertexthypermediaD、Yellowpages正確答案：A9servermaintainsnoinformationaboutpastclientrequests,Protocolsthatmaintain"state"are：A、SimpleB、ComplexC、SecurityD、Easy正確答案：B10Ifyouaredownloadingawebpagewithmultipleobjectsinit,whichofthefollowingisthemostefficientway？A、NonepersistentB、PersistentwithpipelineC、PersistentwithoutpipelineD、Noneoftheabove正確答案：B1Whatisnotcommunicationservicesprovidedtoappsinnetwork:A、connectionlessB、connection-orientedC、object-orientedD、TransmissionControlProtocol正確答案：C2Howisdatatransferredthroughnet,whatiswrong？A、statisticalmultiplexingB、disktodiskcopyC、packet-switchingD、circuitswitching正確答案：B3Inwhichnetwork,propagationdelaymaybegreaterthenqueuingdelay:A、FiberNetworkB、WireLANC、SatelliteNetwork?D、WIFINetwork正確答案：C4Whichisnotanetworkcommunicationlinks?A、FiberB、CopperC、SubwayD、Radio正確答案：C5Packet-switchednetwork'sgoalismovingpacketsthroughroutersfromsourcetodestinationvia:A、forwardB、storeC、dropD、replay正確答案：A6WhichPhysicalMediahaslowerrorrate?A、TwistedPairB、CoaxialcableC、FiberopticcableD、radio正確答案：C7Today’sInternetnotuseA、TCP/IPB、statisticalmultiplexingC、CircuitswitchingD、Packet-switchi正確答案：C8whichisnotCerfandKahn'sinternetworkingprinciples?A、minimalism,autonomyB、besteffortservicemodelC、statelessroutersD、centralizedcontrol正確答案：D9包交換中丟失的包去哪了？A、緩存在路由器B、在傳輸媒體上飛C、在上一個路由器D、徹底消失了正確答案：D10包交換中丟失的包會阻塞網(wǎng)絡(luò)嗎？A、會B、不會C、不確定D、真不知道正確答案：B1TheStatuscodeforrequestsucceededandrequestedobjectlaterinthismessageis:A、301MovedPermanentlyB、200OKC、400BadRequestD、404NotFound正確答案：B2WhichiswronginthefollowingstatementaboutClient-serverarchicture:A、clientscommunicatewithserverB、clientsmayhavedynamicIPaddressesC、clientsisalways-onhostD、clientsdonotcommunicatedirectlywitheachother正確答案：C3responsestatuscodesofrequesteddocumentnotfoundonserver,is:A、404B、500C、400D、304正確答案：A4Whichmothedtypeisnotprovidedin/1.0：A、HEADB、PUTC、POSTD、GET正確答案：B5IntheWebClient/Serverworkenvironment,whoplayacontrolrole?A、HTMLLanguageB、WebClientC、ProtocolD、WebServer正確答案：C6IfeverypageofthesiteneedUser-serverauthorization,wecanuse:A、NonpersistentB、PersistentC、ConditionalGET:client-sidecachingD、Cookies:keeping"state"正確答案：D7Webpageconsistsof<>whichincludesseveralreferencedobjects：A、baseHTML-fileB、homeHTML-fileC、hostHTML-fileD、referencedHTML-file正確答案：A8Webservermaintainsnoinformationaboutpastclientrequests,sois:A、unsatisfiedB、satisfiedC、statelessD、stateful正確答案：C9WhichisnotbasedonwebCaching?A、OfflineBrowseB、NATC、CDNSD、PROXY正確答案：B10InClient-serverparadigm,processsends/receivesmessagesto/fromits:A、FirewallB、DoorC、SocketD、Slot正確答案：C1協(xié)議的服務(wù)器端口號一般為:A、80B、110C、>1024D、>4096正確答案：A2協(xié)議的客戶端端口號一般為:A、80B、110C、>1024D、>4096正確答案：C31.1中持續(xù)/流水線模式時,可以同時傳多個對象嗎？A、不可以B、可以C、不知道D、不確定正確答案：41.1中持續(xù)/流水線模式時,可以同時在一個socket中傳輸多個對象嗎？A、不可以B、可以C、不知道D、不確定正確答案：A5安全性更好的協(xié)議標(biāo)準(zhǔn)是什么？A、2.0B、SC、HTML5D、FLASH正確答案：B6互聯(lián)網(wǎng)上哪個應(yīng)用不屬于WEB2.0？A、SMSB、SNSC、BLOGD、FACEBOOK正確答案：A7Proxy服務(wù)器在實現(xiàn)上主要是利用了什么方法？A、條件更新B、條件請求C、動態(tài)DNSD、動態(tài)IP正確答案：B8一個報文的大小可能是多大？A、小于1480字節(jié)B、小于64K字節(jié)C、大于64K字節(jié)D、理論上無限制正確答案：D9IE8瀏覽器下允許并發(fā)的連接數(shù)可能是多少？A、1B、2C、4D、8正確答案：C10下述哪個方法不能向服務(wù)器遞交信息？A、headB、getC、putD、post正確答案：A1IfyouwanttofindtheserverofWWW.NBU.EDU,selecttheDNSsearchtype?A、Type=CNameB、Type=NSC、Type=MXD、Type=A正確答案：D2WhichtypeofDNSquerycanreturnnamevalueofmailserverassociatedwithdomainname?A、type=NSB、type=CNAMEC、type=MXD、type=A正確答案：C3IfyouwanttobuildaContentDistributionNetworks,YoucantheDNSsearchtypeforalias：A、Type=CNameB、Type=MXC、Type=NSD、Type=A正確答案：A4IfyouwanttofindtheauhoritativenameserverofdomainNBU.EDU,selecttheDNSsearchtype?A、Type=CNameB、Type=NSC、Type=MXD、Type=A正確答案：B5Inclienthost,weneedtoconfigIPwith:A、RootdomainserversB、Top-leveldomainserversC、AuthoritativeDNSserversD、LocalNameServer正確答案：D6Whichdomainnameiswrong?A、cs.un.nlB、cs.keio.ac.jpC、eng.sunD、/com/sun/eng正確答案：D7InDNS,"Idon’tknowthisname,butaskthisserver"means:A、authoritativenameserverB、recursivequeryC、LocalnameserverD、iteratedquery正確答案：D8ThereisidentificationinDNSmessages,whichisa16bitnumberforqueryandreplytoqueryuses：A、samenumberB、number+1C、number+8D、number+16正確答案：A9WhichisnotthereasonfordecentralizeDNS?A、singlepointoffailureB、trafficvolumeC、distantcentralizeddatabaseD、copyright正確答案：D10WhichiswrongforDNS:A、queryandreplymessages,bothwithsamemessageformatB、distributeddbstoringresourcerecords<RR>C、WhenahostmakesaDNSquery,queryissenttoitsRootDNSserverD、distributeddatabaseimplementedinhierarchyofmanynameservers正確答案：C1Whenftpserverreceivesfilecommand,whichopensthe2ndTCPconnectionforfiletranfer:A、serverorclientB、serverandclientC、clientD、server正確答案：A2FtpClientobtainsauthorizationovercontrolconnectiononport：A、20B、21C、25D、110正確答案：B3WhichAPPprotocoluseseparatecontrolanddataconnectionsontoport:A、Email110and25B、Ftp21and20C、80and808D、Telnet25and1025正確答案：B4FTPclientbrowsesremotedirectorybysendingcommandsover:A、IPconnectionB、UDPconnectionC、dataconnectionD、controlconnection正確答案：D5WhichapplicationisusuallybasedonUDPandTCPprotocol?A、NetworkGamesB、FTPDownloadC、SendingE-mailD、WebBrowsing正確答案：A6在下面列出的TCP/IP命令中,哪一個可以被用來遠(yuǎn)程登錄主機？A、telnetB、ftpC、loginD、tftp正確答案：A7Inwhich,FTPdataconnectcaninitiationfromport20onservertohightportonclient?A、PassiveFTPB、ActiveFTPC、SFTPD、TFTP正確答案：B8Inwhich,FTPdataconnectcaninitiationfromhighportonclienttohighportonserver?A、ActiveFTPB、PassiveFTPC、SFTPD、TFTP正確答案：B9WhichisnotasamplecommandsthatsentasASCIItextovercontrolchannelinFTP?A、USERB、PASSC、LISTD、HEAD正確答案：D10WhichisnotaSamplereturncodesinFTP?A、304B、331C、125D、425正確答案：A1IfyouwanttofindthemailserverofdomainNBU.EDU,selecttheDNSsearchtype?A、Type=MAILB、Type=NSC、Type=MXD、Type=A正確答案：C2WhichiswrongforSMTP:A、SMTPusetwoseparatedconnectionsforoutgoingmailsB、SMTPserverusesCRLF.CRLFtodetermineendofmessageC、SMTPrequiresmessage<header&body>tobein7-bitASCIID、SMTPusespersistentconnections正確答案：A3Whichisnotaemailapplicationprotocol?A、SMNPB、SMTPC、IMAPD、POP3正確答案：A4InMIME,MswordisonesubtypesofContent-Type:A、TextB、ApplicationC、ImageD、Doc正確答案：B5Inemailprotocol,whichwillnotbeused?A、MINEB、QP<Quote-Printable>C、Base64D、CDNS正確答案：D6ForsendemailviaSMTP,itrequiresmessage<header&body>tobein:A、octet-streamB、8-bitASCIIC、7-bitASCIID、Ziped正確答案：C7Whichoneisarightemailaddress?A、wang$163B、wang102&163C、wang#sinaD、Wangsina正確答案：D8WhichelementarenotinMailServers:A、MailboxcontainsincomingmessagesforuserB、Messagequeueofoutgoing<tobesent>mailmessagesC、SMTPprotocolbetweenmailserverstosendemailmessagesD、NATdeviceforoutgoingmails正確答案：D9Whichisnotamajorcomponents?A、useragentsB、mailserversC、simplemailtransferD、gmail正確答案：D10SMTPusesTCPtoreliablytransferemailmessagefromclienttoserverwithport:A、21B、25C、75D、110正確答案：B1InP2Pfilesharing,whichiseasytoshutdownbylaw:A、QueryfloodingB、decentralizeddirectoryC、centralizeddirectoryD、pureClinet/Server正確答案：C2InP2Pfilesharing,inwhichthegroupleaderscangetoverloaded:A、centralizeddirectoryB、QueryfloodingC、decentralizeddirectoryD、PureClinet/Server正確答案：C3C/S,P2Pand_____arethreetypesofapplicationarchitectures.A、B/SB、HybridofC/SandP2PC、UsertouserD、CommandandConquer正確答案：B4Whichisnotanetworkendsystemarchitecturemodel:A、Client/ServerB、Peer-PeerC、End-EndD、HybridClient/ServerandPeer-Peer正確答案：C5TheproblemswithcentralizeddirectoryofP2Pnotinclude:A、CopyrightinfringementB、PerformancebottleneckC、BootstrapnodeneededD、Singlepointoffailure正確答案：C6TheproblemswithdecentralizeddirectoryofP2Pmaybe:A、CopyrightinfringementB、PerformancebottleneckC、BootstrapnodeneededD、Singlepointoffailure正確答案：C7IncentralizeddirectoryofP2P,thedisadvantagesofapproachmaybe:A、complexprotocolB、bootstrapnodeneededC、singlepointoffailureD、groupleaderscangetoverloaded正確答案：C8Queryfloodingisfullydistributed,itmeans：A、nodistributedserverB、nocentralserverC、noIPneededD、nowater正確答案：B9WhichoneiswronginP2Pdecentralizeddirectory?A、EachpeeriseitheragroupleaderorassignedtoagroupleaderB、GroupleadertracksthecontentinallitschildrenC、PeerqueriesotherpeersD、Groupleadermayqueryothergroupleaders正確答案：C10whichoneiswronginP2Pwithcentralizeddirectory？A、peerisdecentralized,B、filetransferisdecentralizedC、locatingcontentishighlycentralizedD、locatingcontentishighlydecentralized正確答案：D1郵件發(fā)送方顯示郵件已經(jīng)發(fā)送成功,可是有的時候接受方卻沒有接受到郵件,那是因為顯示的僅僅為客戶端發(fā)送到自己的SMTP服務(wù)器成功了。正確答案：√2郵件傳輸過程可以省略中間服務(wù)器的轉(zhuǎn)發(fā),可否直接傳輸?shù)綄Ψ降泥]件服務(wù)器。正確答案：√3書上說方式是一個請求、一個封裝、一個對象進(jìn)行傳送的,而我們平時通過瀏覽器發(fā)郵件時可以同時發(fā)送多個附件,這是矛盾的。正確答案：×4EMAIL傳輸文件時,可以區(qū)分文件類型,文本文件使用TCP/IP協(xié)議傳輸,視頻文件使用UDP協(xié)議傳輸,這樣傳輸速度會更快。正確答案：×5有時在QQ郵箱發(fā)送郵件,會挺久后才顯示在發(fā)送中,可是文件本身并不大呀,這是因為郵件服務(wù)器的排隊發(fā)送的隊列可能比較長。正確答案：√6郵件服務(wù)器之間的郵件傳送使用SMTP協(xié)議,客戶端往郵件服務(wù)器發(fā)送郵件采用POP3協(xié)議。正確答案：×7SMTP要求必須在提供了賬戶名和密碼之后才可以登錄SMTP服務(wù)器,這就可以徹底防止那些垃圾郵件。正確答案：×8IMAP協(xié)議可以閱讀郵件,但是不可以發(fā)送郵件,郵件客戶端發(fā)送郵件必須用SMTP。正確答案：√9Base64的編碼方式不能解決繁體漢字的郵件處理。正確答案：×1Incommunicationlinks,transmissionratemeans：A、BandwidthB、propagationspeedC、processspeedD、routerdelays正確答案：A2Whencongestoccurinnetwork,whichdelaybecomelarge?A、propagationdelayB、queuingdelayC、transmissiondelayD、processingdelay正確答案：B3應(yīng)用層中的數(shù)據(jù)塊常被稱為:A、比特流B、幀C、分組D、消息正確答案：D4Ifyouaredownloadingawebpagewithmultipleobjectsinit,whichofthefollowingisthemostefficientway？A、NonepersistentB、PersistentwithpipelineC、PersistentwithoutpipelineD、Noneoftheabove正確答案：B5WhichoneiswronginP2Pdecentralizeddirectory?A、?EachpeeriseitheragroupleaderorassignedtoagroupleaderB、GroupleadertracksthecontentinallitschildrenC、PeerqueriesotherpeersD、Groupleadermayqueryothergroupleaders正確答案：C6Inclienthost,weneedtoconfigIPwith:A、Rootdomain<TLD>serversB、Top-leveldomain<TLD>serversC、AuthoritativeDNSserversD、LocalNameServer正確答案：D7Whatisthedefaultpersistentmodelin/1.1:A、NonpersistentwithpipeliningB、PersistentwithpipeliningC、PersistentwithoutpipeliningD、Nonpersistent正確答案：B8Whichdomainnameiswrong?A、cs.un.nlB、cs.keio.ac.jpC、eng.sunD、/com/sun/eng正確答案：D9IE8瀏覽器下允許并發(fā)的連接數(shù)可能是多少？A、1B、2C、4D、8正確答案：C10下列哪一組協(xié)議屬于應(yīng)用層協(xié)議？A、ICMP,RARP,ARPB、FTP,SMIP,TELNETC、ARP,IP,UDPD、IP,TCP,UDP正確答案：B11Proxy服務(wù)器在實現(xiàn)上主要是利用了什么方法？A、條件更新B、條件請求C、動態(tài)DNSD、動態(tài)IP正確答案：B12ThereisidentificationinDNSmessages,whichisa16bitnumberforqueryandreplytoqueryuses：A、samenumberB、number+1C、number+8D、number+16正確答案：A13WWWserversorganizeinformationinto:A、WEBpagesB、RelationalDatabaseC、DistributedhypertexthypermediaD、Yellowpages正確答案：A14ForsendemailviaSMTP,itrequiresmessage<header&body>tobein:A、octet-streamB、8-bitASCIIC、7-bitASCIID、Ziped正確答案：C15WhichisnotasamplecommandsthatsentasASCIItextovercontrolchannelinFTP?A、USERB、PASSC、LISTD、HEAD正確答案：D16WhichapplicationisusuallybasedonUDPandTCPprotocol?A、NetworkGamesB、FTPDownloadC、SendingE-mailD、WebBrowsing正確答案：A17Whatisnotcommunicationservicesprovidedtoappsinnetwork:A、connectionlessB、connection-orientedC、object-orientedD、TransmissionControlProtocol正確答案：C18Thecenterofinternetstructureis:A、Tier-1ISPsB、LocalISPsC、RootDNSD、NAP正確答案：A19Inwhichnetwork,propagationdelaymaybegreaterthenqueuingdelay？A、FiberNetworkB、WireLANC、SatelliteNetwork?D、WIFINetwork正確答案：C20InMIME,MswordisonesubtypesofContent-Type:A、TextB、ApplicationC、ImageD、Doc正確答案：D二、多選題〔題數(shù)：10,共20分1AsystemviewoftheInternetinclude:A、MillionsofconnectedcomputingdevicesB、CommunicationlinksC、CircuitD、RoutersE、Protocols正確答案：ABDE2WhicharetheproblemswithcentralizeDNS?A、singlepointoffailureB、trafficvolumeC、distantcentralizeddatabaseD、statelessE、maintenancenoteasy正確答案：ABCE3WhichMethodtypesarein/1.0:A、GETB、POSTC、HEADD、PUT正確答案：ABC4Howdoconnectendsystemstoedgerouter:A、NetworkofrelationshipsB、MobileaccessnetworksC、InstitutionalaccessnetworksD、Residentialaccessnetworks正確答案：BCD5Whatarethemajorcomponentsofemail?A、useragentsB、mailserversC、simplemailtransferprotocolD、mailstoreprotocolsE、mailaccessprotocols正確答案：ABCE6InClient-serverarchitecture,clientscanbe:A、CommunicatedirectlywitheachotherB、HavedynamicIPaddressesC、IntermittentlyconnectedD、Communicatewithserver正確答案：BCD7InClient-serverarchitecture,servercanbe:A、Always-onhostB、PermanentIPaddressC、ServerfarmsforscalingD、Initalizeconnectiontoclient正確答案：ABC8Application-layerprotocoldefines：A、TypesofmessagesexchangedB、SyntaxofmessagetypesC、SemanticsofthefieldsD、Rulesforwhenandhowprocessessend&respondtomessagesE、Portnumberofservers正確答案：ABCD9InwhichQueuingdelaystate,more"work"arrivingthancanbeserviced,averagedelayisinfinite?R=linkbandwidth<bps>L=packetlength<bits>a=averagepacketarrivalrateA、La/R~0.1B、La/R~0.2C、La/R~1.1D、La/R~1.2E、La/R~2.0正確答案：CDE10Webcachingcan：A、Reduceresponsetimeforclientrequest.B、Reducetrafficonaninstitution’saccesslink.C、ResultinProviderstoeffectivelydelivercontentD、GuaranteeQOS正確答案：ABC三、判斷題〔題數(shù)：10,共20分1WithSMTP,itispossibletosendmultiplemailmessagesoverthesameTCPconnection.正確答案：√2IfaPOP3clientdoesnotsendthedelecommand,copiesofthemessagesthattheclienthasretrievedremaininthemailserver.正確答案：√3TheDate:headerintheresponsemessageindicateswhentheobjectintheresponsewaslastmodified.正確答案：√4郵件服務(wù)器之間的郵件傳送使用SMTP協(xié)議,客戶端往郵件服務(wù)器發(fā)送郵件采用POP3協(xié)議。正確答案：×5IMAP協(xié)議可以閱讀郵件,但是不可以發(fā)送郵件,郵件客戶端發(fā)送郵件必須用SMTP。正確答案：√6DNSlookupsofteninvolveacombinationofrecursiveanditerativequeries.正確答案：√7有時在QQ郵箱發(fā)送郵件,會挺久后才顯示在發(fā)送中,可是文件本身并不大呀,這是因為郵件服務(wù)器的排隊發(fā)送的隊列可能比較長。正確答案：√8Base64的編碼方式不能解決繁體漢字的郵件處理。正確答案：×9TheDate:headerintheresponsemessageindicateswhentheobjectintheresponsewaslastmodified.正確答案：√10Itispossibleforamailclienttosende-mailmessagesoverratherthanSMTP.正確答案：√1在TCP/IP協(xié)議簇的層次中,解決不同計算機的進(jìn)程之間通信問題是在〔A、網(wǎng)絡(luò)層B、應(yīng)用層C、接口層D、傳輸層正確答案：D2WhatisFSMinReliabledatatransfer?A、FeedbackShiftMarkB、FrequencyShiftManageC、FinitestatemachinesD、ForeignServicemachines正確答案：C3OneofInternettransport-layerprotocolsisTCP,itproviderservicesA、AccesscontrolB、Reliable,in-orderdeliveryC、DelayguaranteesD、Bandwidthguarantees正確答案：B4InGBN,whenreceiverreceiveaout-of-orderpacket,thendiscardandre-ACKthepacketwith:A、lowestin-orderport#B、highestin-orderport#C、lowestin-ordersequence#D、highestin-ordersequence#正確答案：D5RDTHandleduplicates,senderaddswhattoeachpacket:A、PhonenumberB、SocketnumberC、SequencenumberD、TTLvalue正確答案：C6InRDTApproachs,whichisdesignedforperformance:A、ACKorNAKB、sequence#C、pipelineD、checksum正確答案：C7InRDTprotocol,whichcanincreasetheuseofphysicalresources:A、ChecksumB、ACKC、PipelineD、Timer正確答案：C8Inchannelwithbiterrors,RDTrecoverfromerrorsneed:A、AMDB、ARQC、ARPD、ACKs正確答案：D9InRDTApproachs,whichisdesignedforbiterror:A、checksumB、pipelineC、sequence#D、ACKorNAK正確答案：A10UDP協(xié)議能夠提供的服務(wù)是：A、流量控制B、擁塞控制C、連接管理D、端到端傳輸正確答案：D1TCPFlowControlisaspeed-matchingservicefor:A、keepthesendratelargethenthesenderapplication'sdrainrateB、keepthesendratelargethenthereceivingapplication'sdrainrateC、matchingthesendratetothesenderapplication'sdrainrateD、matchingthesendratetothereceivingapplication'sdrainrate正確答案：D2WhichoneisnotthemechanismofTCPCongestionControl:A、ConservativeaftertimeouteventsB、slowstartC、FIFOD、AIMD正確答案：C3WhicheventwillnotbeinTCPReceiver:A、ArrivalofsegmentthatpartiallyorcompletelyfillsgapB、Arrivalofout-of-ordersegmenthigher-than-expectseq.#.Nogapdetected.C、Arrivalofin-ordersegmentwithexpectedseq#.OneothersegmenthasACKpending.D、Arrivalofin-ordersegmentwithexpectedseq#.Alldatauptoexpectedseq#alreadyACKed.正確答案：B4WhichofthefollowingmeasuresthetimefromonesegmenttransmissiontoACKreceipt:A、largestRTTB、estimationRTTC、sampleRTTD、doubleRTT正確答案：C5InthemechanismofTCPCongestionControl,AIMDmeans:A、afterinput/mustdecreaseB、additiveincrease/multiplicativedecreaseC、afterincrease/mustdecreaseD、additiveinput/multiplicativedecode正確答案：B6Intoday'sinternet,theapproachestowardscongestioncontrolisA、End-EndcongestioncontrolB、Network-assistedcongestioncontrolC、Step-By-StepcongestioncontrolD、Qos正確答案：A7IneventofTCPReceiver,whenarrivalofin-ordersegmentwithexpectedseq#.Alldatauptoexpectedseq#alreadyACKed,then:A、DelayedACK.Waitupto500msfornextsegment.Ifnonextsegment,sendACK.B、ImmediatelysendsinglecumulativeACK,ACKingbothin-ordersegments.C、ImmediatelysendduplicateACK,indicatingseq.#ofnextexpectedbyte.D、ImmediatesendACK,providedthatsegmentstartatlowerendofgap正確答案：A8HowdoesTCPsenderperceivecongestion?A、GoBacktoNB、delayeventC、RetransmissioneventD、Lostevent正確答案：D9UDPisoneofInternettransport-layerprotocols,ithas:A、No-frillsextensionof"best-effort"IPB、ConnectionsetupC、FlowcontrolD、Congestioncontrol正確答案：A10InTCP,Retransmissionscanbetriggeredby:A、TimeouteventsB、CongestioncontrolC、DuplicatedatasD、Flowcontrol正確答案：A1UDP不存在公平性,UDP有可能會壓制TCP傳輸,TCP是應(yīng)對這種壓制可以采用多線程多連接傳輸。正確答案：√2TCP拆除連接要比建立連接多一次握手,是因為需要雙向拆除并雙向確認(rèn)。正確答案：√3tcp可以提供流量控制,UDP的應(yīng)用一定不能提供流量控制。正確答案：×4在TCP協(xié)議中,傳輸?shù)臄?shù)據(jù)有沒有優(yōu)先級的設(shè)定,重傳的數(shù)據(jù)包有優(yōu)先發(fā)送權(quán)。正確答案：×5TCP協(xié)議有擁塞控制策略,網(wǎng)絡(luò)還會發(fā)生擁塞崩潰是因為同時存在UDP,而且TCP擁塞的推斷有時間滯后等問題。正確答案：√6TCP協(xié)議如果雙方一直沒有收發(fā)信息,超過一定時間協(xié)議會強制關(guān)閉連接。正確答案：×7TCP的ACK可以攜帶數(shù)據(jù)亂序和網(wǎng)絡(luò)擁塞的信息。正確答案：×8可以設(shè)計應(yīng)用采用udp協(xié)議發(fā)送消息、tcp協(xié)議接受消息。正確答案：×9UDP協(xié)議下網(wǎng)絡(luò)擁塞會造成嚴(yán)重丟包。正確答案：√10用TCP發(fā)送數(shù)據(jù)時發(fā)送端發(fā)送數(shù)據(jù)的速度未知,不會出現(xiàn)接收端來不及接受的問題。正確答案：×1WhichisanInter-ASroutingprotocols:A、ICMP:InteriorControlMessageProtocolB、IGRP:InteriorGatewayRoutingProtocolC、BGP:BorderGatewayProtocolD、RIP:RoutingInformationProtocol正確答案：C2WhichisnotacommonIntra-ASroutingprotocols:A、ICMP:InteriorControlMessageProtocolB、IGRP:InteriorGatewayRoutingProtocolC、OSPF:OpenShortestPathFirstD、RIP:RoutingInformationProtocol正確答案：A3WhichprotocolcanassigntheindividingIPaddresstothehostandrouterinterfacesinitsorganization?A、DHCPB、NATC、POP3D、OSPF正確答案：A4InInternetControlMessageProtocol,ifICMPDatasenderrorthenreporttowhom:A、SourceB、DestinationC、RouteD、None正確答案：A5IPReassembly<afterfragmentation>willbein:A、NAT