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1、Whatisthiscourseabout?Thiscourseprovidesanintroductiontofundamentalconceptsinthedesignandimplementationofcomputercommunicationnetworks,theirprotocols,andapplications.Topicstobecoveredinclude:overviewof networkarchitectures,applications,networkprogramminginterfaces(e.g.,sockets),transport,conges
2、tion,routing,anddatalinkprotocols,addressing,localareanetworksintroductory(first)courseincomputernetworkinglearnprinciplesofcomputernetworkinglearnpracticeofcomputernetworkingInternetarchitecture/protocolsascasestudy1IntroductionChapter1:IntroductionOurgoal:get“feel”andterminologymoredepth,deta
3、illaterincourseapproach:useInternetasexampleOverview:what’stheInternetwhat’saprotocol?networkedgenetworkcoreaccessnet,physicalmediaInternet/ISPstructureperformance:loss,delayprotocollayers,servicemodelsnetworkmodeling2IntroductionChapter1:roadmap1.1WhatistheInternet?1.2Networkedge1.3Networkcore
4、1.4Networkaccessandphysicalmedia1.5InternetstructureandISPs1.6Delay&lossinpacket-switchednetworks1.7Protocollayers,servicemodels1.8History3IntroductionWhat’stheInternet:“nutsandbolts”viewmillionsofconnectedcomputingdevices:hosts=endsystemsrunningnetworkappscommunicationlinksfiber,copper,radio,s
5、atellitetransmissionrate=bandwidthrouters:forwardpackets(chunksofdata)localISPcompanynetworkregionalISProuterworkstationservermobile4Introduction“Cool”internetappliancesWorld’ssmallestwebserverhttp://www-ccs.cs.umass.edu/~shri/iPic.htmlIPpictureframehttp://www.ceiva.com/Web-enabledtoaster+weath
6、erforecasterInternetphones5IntroductionWhat’stheInternet:“nutsandbolts”viewprotocolscontrolsending,receivingofmsgse.g.,TCP,IP,HTTP,FTP,PPPInternet:“networkofnetworks”looselyhierarchicalpublicInternetversusprivateintranetInternetstandardsRFC:RequestforcommentsIETF:InternetEngineeringTaskForceloc
7、alISPcompanynetworkregionalISProuterworkstationservermobile6IntroductionWhat’stheInternet:aserviceviewcommunicationinfrastructureenablesdistributedapplications:Web,email,games,e-commerce,filesharingcommunicationservicesprovidedtoa
