天津理工大学计算机网络期末考试复习提纲带答案.pdf

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1、单选题/填空题：1.CIDRaddress无类域间路由地址(P227-229)2.UDP用户数据报协议（P132-135）3.TCPretransmissionTCP重传(P163-167,3.5.4)4.IPaddressheaderlengthIP地址首部长度(40bytes)5.IPheaderfieldIP地址首部(P221-225)6.networkedgeandnetworkcore网络边缘与网络核心（P6-22,1.3-1.4）7.transmissiondelay传输时延:d/s8.applicationprotocols(underl

2、yingtransportprotocols)基于运输层的应用层协议（TCP、UDP）9.transportprotocolsandportnumbersofsomeapplicationprotocols运输层协议、应用层协议及端口号10.TCPsegmentstructureandUDPsegmentstructureTCP（P157-158）、UDP报文结构（P135，3.3.1）11.IPv6addressIPV6地址（P238-242）12.MACaddressMAC地址（P307-308）13.Ping14.Trafficintensity

3、流量强度(P28)15.HTTPstatuscodeHTTP状态码(P71)简答题：1.Thetwokeyfunctionofnetworklayer(routingandforwarding)网络层两个核心功能（转发与选路）forwarding:movepacketsfromrouter’sinputtoappropriaterouteroutput.routing:determineroutetakenbypacketsfromsourcetodest.2.ThelayersofaDNSserverDNS服务器分层结构rootnameserver、

4、top-leveldomain(TLD)server、authoritativeDNSserver、LocalDNSnameserver3.RoutingtoanotherLANbyknowingIPaddress(ARP,Ethernetwork)(P309-314)已知IP地址，选路到另一个局域网掌握ARP工作原理，掌握在同一子网中ARP是如何工作的，中间经过路由器是如何工作的。4.pipelinedprotocolandstop-and-waitprotocol流水线协议与停等协议（P138-147）掌握RDT2.0、3.0和流水线的工作方式以及

5、效率。5.OSIarchitectureOSI参考模型有哪几层？每层的功能是什么？application:supportingnetworkapplicationspresentation:allowapplicationstointerpretmeaningofdatasession:synchronization,checkpointing,recoveryofdataexchangetransport:process-processdatatransfernetwork:routingofdatagramsfromsourcetodestinat

6、ionlink:datatransferbetweenneighboringnetworkelementsphysical:bits“onthewire”第1页共2页6.ThedifferencebetweenpureALOHAandCSMA纯ALOHA协议与CSMA协议的区别PureAloha:simpler,nosynchronization.Whenframefirstarrives,transmitimmediately.Butcollisionprobabilityincreases:framesentatt0collideswithothe

7、rframessentin[t0-1,t0+1]CSMA:Listenbeforetransmit:ifchannelsensedidle,transmitentireframe;ifchannelsensedbusy,defertransmission.综合题：1.TCPcongestioncontrolTCP拥塞控制(P181-186)2.Dijkstra’sshortest-pathalgorithmDijkstra最短路径算法(4.5.1P246-247)3.Protocolanalyze(howeachlayerofTCP/IPworksif

8、weusehttporftp)协议分析，自顶向下分析HTTP/FTP工作原理（全书综合）第2页