(word完整版)101G09XT1[1].宁波大学计算机网络A.答案.docx

宁波大学2009/2010学年第1学期考试卷（eq\o\ac(○,A)/B）
课号：_101G09XT1_课名：计算机网络__

第页共NUMPAGES5页

单选题，每题仅一个正确答案，每题1.5分，共30分：
[]1.Whichisnotanetworkcommunicationlinks?
D.Subway

[]2.WhichisnotthetypesofprotocoldataunitinTCP/IP?
C.datetime

[]3.Inwhichstatethedelaysofrouterbecomesmall?
La/R~0

[]4.Whencongestoccurinnetwork,whichdelaybecomelarge?
B.queuingdelay

[]5.Applicationprotocoldefinethetypesofmessagesexchanged,whichare:
A.request&responsemessages

[]6.Whichversionofhypertexttransferprotocolareusedindefaultmodenow?
C.HTTP1.1

[]7.TheHttpclientworksonwhichport:
C.TCPportabove1024

[]8.ToindicatesendofmessageinHttp,wecanuse:
A.Carriagereturnandlinefeed

[]9.Whichisnotanemailprotocol:
C.Emule

[]10.TCPretransmissioncannotbecausedby:
D.ACK

[]11.WhichofthefollowingmeasuresthetimefromonesegmenttransmissiontoACKreceipt:
sampleRTT

[]12.WhicheventwillnotbeinTCPReceiver:
C.Arrivalofout-of-ordersegmenthigher-than-expectseq.#.
Nogapdetected.

[]13.TCPFlowControlisaspeed-matchingserviceformatching:
A.thesenderratetothereceivingapplication’sdrainrate
[]14.WhichoneisnotthemechanismofTCPCongestionControl:
C.FIFO

[]15.InRDTprotocol,whichcanincreasetheuseofphysicalresources:
C.Pipeline

[]16.WhichoneisnottheKeyNetwork-LayerFunctionsintoday’sinternet:
C.Connectionsetup

[]17.WhichofthefollowingIPaddressbelongstocategoryCaddress?
210.98.3.4

[]18.NetworkaddresstranslationimplementinNATrouter,itmustuse:
C．NATtranslationtable

[]19.ICMPdonoterrorreportingabout:
D.unknownusername

[]20.InEthernet’sCSMA/CDJamSignalmakesure:
A.othertransmittersareawareofcollision

二、多选题，每题有2-3个正确答案，请在正确项前打钩(全钩不给分)，每题2分，共20分：
1.Thecommunicationservicesbeprovidedtoapplications,Itcanbe:
[]A.connectionless
[]B.connection-oriented

2.Whichareapplicationarchitecturesmodelintheinternet?
[]A.client/servermodel
[]B.peer-peermodel
[]C.browser/servermodel

3.UserAgentisaninterfacewithuser“above”andnetwork“below”,suchas:
[]A.Web:browser
[]B.E-mail:mailreader
[]D.Streamingaudio/video:mediaplayer

4.Ftpprotoco