资料计算机网络题库大连交通大学chapter2Word文档下载推荐.docx

资料计算机网络题库大连交通大学chapter2Word文档下载推荐.docx

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2.Inthecontextofacommunicationsessionbetweenapairofprocess,theprocessthatinitiatesthecommunicationislabeledasthe,theprocessthatwaitstobecontactedtobeginthesessionislabeledasthe.

Aclientprocess,serverprocessBsendingprocess,receivingprocess

Cinputprocess,outputprocessDcommunicatingprocess,connectingprocess

3.Asocketistheinterfacebetweenwithinahost.

Athenetworklayerandthelinklayer

Bthelinklayerandthephysicallayer

Ctheapplicationlayerandthetransportlayer

Dthetransportlayerandthenetworklayer

4.Inthefollowingapplications,whichoneisaloss-tolerantapplication?

AE-mailBfiletransferCinstantmessagingDreal-timeaudio

5.Inthefollowingapplications,whichoneisabandwidth-sensitiveapplication?

AE-mailBwebapplicationCreal-timeaudioDfiletransfer

6.TheserviceofTCPcan’tguarantee.

AdeliveryofalldatawithouterrorBdeliveryofalldataintheproperorder

CtherateofdeliveryDcongestioncontrol

7.Inthefollowingapplications,whichoneusesUDP?

AE-mailBwebapplicationCfiletransferDDNS

8.InthefollowingdescriptionsaboutHTTP,whichoneisnotcorrect?

AHTTPusesnon-persistentconnectionsinitsdefaultmode.

BHTTPusesTCPasitsunderlyingtransportprotocol.

CHTTPisastatelessprotocol.

DHTTPisclient-serverarchitecture.

9.SupposeawebpageconsistsofabaseHTMLfile,5JEPGimagesandajavaapplet,andalsosupposeHTTPusespersistentconnectionwithoutpipelining,thetotalresponsetimeis.

A2RTTB8RTTC12RTTD14RTT

10.InHTTPresponsemessage,iftherequestedHTTPprotocolversionisnotsupported,thestatuscodeis.

A200B301C400D505

11.Theportnumberofwebapplicationis.

A25B20C80D53

12.AnetworkentitythatsatisfiesHTTPrequestsonthebehalfofanoriginwebserveris.

AserverfarmBserverstackCproxyserverDedgeserver

13.Inthefollowingdescriptionsaboutpersistentconnection,whichoneisnotcorrect?

ATheserverleavestheTCPconnectionopenaftersendingaresponse.

BEachTCPconnectionisclosedaftertheserversendingoneobject.

CTherearetwoversionsofpersistentconnection:

withoutpipeliningandwithpipelining.

DThedefaultmodeofHTTPusespersistentconnectionwithpipelining.

14.FTPusestwoparallelTCPconnectionstotransferafile,thereare.

Acontrolconnectionanddataconnection

Breceivingconnectionandsendingconnection

Cclientconnectionandseverconnection

Dprogramconnectionandprocessconnection

15.InthefollowingdescriptionsaboutFTP,whichoneiscorrect?

AFTPisp2parchitecture.BFTPsendsitscontrolinformationout-of-band.

CFTPusespersistentconnection.DFTPisastatelessprotocol.

17.TheInternetmailsystemhasthreecomponentswhichtheyare.

Auseragent,SMTP,POP3BSMTP,POP3,IMAP

Cuseragent,SMTP,IMAPDuseragent,SMTP,mailserver

18.IfthestatuscodeinHTTPresponsemessageis404,itmeans.

ARequestsucceeded.

BTherequesteddocumentdoesn’texitonthisserver.

CThisisagenericerrorcodeindicatingthattherequestcouldnotbeunderstoodbytheserver.

DRequestedobjecthasbeenpermanentlymover.

19.ComparisonHTTPwithSMTP,thecorrectis.

AHTTPisapushprotocol,andSMTPisapullprotocol.

BInthedefaultmode,bothofthemusepersistentconnection.

CHTTPplacesallofthemessage’sobjectsintoonemessage,andSMTPsendseveryobjectonebyone.

DHTTPrequireseachmessagetobein7-bitASCIIformat,andSMTPdoesn’timposethisrestriction.

20.TheheadersintheMIMEmessagemustincludeexcept.

AFromBContent-typeCContent-transfer-encodingDMIMEversion

21.Inthefollowingprotocol,whichoneisstateless?

APOP3BSMTPCFTPDIMAP

22.DNSmeans.

ADataNameSystemBDataNationalSystem

CDomainNameSystemDDomainNationalSystem

23.TherearethreeclassesofDNSserverexcept.

ARootDNSserverBLocalDNSserver

CTLDserverDAuthoritativeDNSserver

24.DNSprovidessomeservicesexcept.

AHostaliasingBMailserveraliasing

CLoaddistributionDAsinglepointoffailure

28.Thetimeittakesforasmallpackettotravelfromclienttoserverandthenbacktotheclientis.

Around-traveltimeBnext-hoptime

Cround-triptimeDprefix-matchingtime

29.SupposeA（withaWeb-basede-mailaccount）sendsamessagetoB（whoaccesseshismai