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1、ComputerNetworking:ATop-DownApproachFeaturingtheInternet,3rdEditionSolutionstoReviewQuestionsandProblemsNote:Thesesolutionsareincomplete.Completesolutionswillbeavailableby1September2005VersionDate:July1,2004Thisdocumentcontainsthesolutionstoreviewquestionsandproblemsforthe3rdeditionofCompute
2、rNetworking:ATop-DownApproachFeaturingtheInternetbyJimKuroseandKeithRoss.ThesesolutionsarebeingmadeavailabletoinstructorsONLY.PleasedoNOTcopyordistributethisdocumenttoothers(evenotherinstructors).Pleasedonotpostanysolutionsonapublicly-availableWebsite.We’llbehappytoprovideacopy(up-to-date)of
3、thissolutionmanualourselvestoanyonewhoasks.Allmaterial©copyright1996-2004byJ.F.KuroseandK.W.Ross.AllrightsreservedChapter1ReviewQuestions1.Thereisnodifference.Throughoutthistext,thewords“host”and“endsystem”areusedinterchangeably.EndsystemsincludePCs,workstations,Webservers,mailservers,Intern
4、et-connectedPDAs,WebTVs,etc.2.SupposeAlice,anambassadorofcountryAwantstoinviteBob,anambassadorofcountryB,overfordinner.Alicedoesn’tsimplyjustcallBobonthephoneandsay,“cometoourdinnertablenow”.Instead,shecallsBobandsuggestsadateandtime.Bobmayrespondbysayinghe’snotavailablethatparticulardate,bu
5、theisavailableanotherdate.AliceandBobcontinuetosend“messages”backandforthuntiltheyagreeonadateandtime.Bobthenshowsupattheembassyontheagreeddate,hopefullynotmorethan15minutesbeforeoraftertheagreedtime.DiplomaticprotocolsalsoallowforeitherAliceorBobtopolitelycanceltheengagementiftheyhavereason
6、ableexcuses.3.Anetworkingprogramusuallyhastwoprograms,eachrunningonadifferenthost,communicatingwitheachother.Theprogramthatinitiatesthecommunicationistheclient.Typically,theclientprogramrequestsandreceivesservicesfromtheserverprogram.4.TheInternetprovidesitsapplicationsaconnection-orientedse
7、rvice(TCP)andaconnectionlessservice(UDP).EachInternetapplicationmakesuseofonethesetwoservices.ThetwoserviceswillbediscussedindetailinChapter3.Someoftheprinciplecharacteristicsoftheconnection-orientedserviceare:·Twoend-systemsfirst“handshake”beforee
