宁波大学计算机网络B试卷.doc

宁波大学2011/2012学年第1学期考试卷（B） 学号：______________姓名：______________
学号姓名
课号：_101G09X0B/09/08_课名：计算机网络__(答题卡和每页试卷均请写上姓名学号，答案请填在答题卡上)

第页共NUMPAGES4页

Choosethesinglecorrectanswerfromfollowingchoose.(1.5*20=30)
[Correctchecked:1.5;Otherwise:0]
1.Thecenterofinternetstructureis:
[]A.Tier-1ISPs
[]B.LocalISPs
[]C.RootDNS
[]D.NAP
2.Intodaysinternet,lostpacketmaybe:
[]A.retransmittedbypreviousnode
[]B.retransmittedbysourceendsystem
[]C.retransmittedbydestinationendsystem
[]D.retransmittedbynextnode
3.Whichcanprovidesdelaymeasurementfromsourcetorouteralongend-endInternetpathtowardsdestination：
[]A.Ping
[]B.Traceroute
[]C.Ipconfig
[]D.Nslookup
4.Whichlayercandefinemessagesexchangedbyapplicationsandactionstaken:
[]A.Applicaion
[]B.Transport
[]C.Network
[]D.DataLink
5.HTTPmessages(application-layerprotocolmessages)exchangedbetweenbrowser(HTTPclient)andWebserver(HTTPserver)with:
[]A.TCP
[]B.UDP
[]C.ICMP
[]D.IGMP
6.WhatisthedefaultpersistentmodelinHTTP/1.1:
[]A.NonpersistentHTTP
[]B.Persistentwithoutpipelining
[]C.Persistentwithpipelining
[]D.Nonpersistentwithpipelining
7.TheStatuscodeforrequestsucceededandrequestedobjectlaterinthismessageis:
[]A.200OK
[]B.301MovedPermanently
[]C.400BadRequest
[]D.404NotFound

8.Whenftpserverreceivesfilecommand,whichopensthe2ndTCPconnectionforfiletranfer:
[]A.server
[]B.client
[]C.serverandclient
[]D.serverorclient
9.Whichcansatisfyclientrequestwithoutinvolvingoriginserver:
[]A.Webcaches
[]B.Writecaches
[]C.TCPbuffer
[]D.Routerbuffer
10.TCPsocketidentifiedby:
[]A.two-tuple(sourceIPaddress,sourceportnumber)
[]B.two-tuple(destIPaddress,destportnumber)
[]C.two-tuple(sourceIPaddress,destportnumber)
[]D.four-tuple(sourceIPaddress,sourceportnumber,destIPaddress,destportnumber)
11.TCPFlowControlisaspeed-matchingservicefor:
[]A.matchingthesendratetothereceivingapplication’sdrainrate
[]B.matchingthesendratetothesenderapplication’sdrainrate
[]C.keepthesendratelargethenthereceivingapplication’sdrainrate
[]D.keepthesendratelargethenthesenderapplication’sdrain