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

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

第页共NUMPAGES5页
(word完整版)101G09XT1[1].宁波大学计算机网络A.答案

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.Streamin