毕业外文翻译-两种动态路由协议的性能比较

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1、PerformanceComparisonofTwoDynamicRoutingProtocols:RIPandOSPFABSTRACT:Therearetwomainclassesofadaptiveroutingprotocolsintheinternet:distancevectorandlinkstate.Thispaperpresentsthecomparisonbetweendistancevectorandlinkstate.ItalsooutlinestheprosandconsofRIPandOSPFprotocol

2、sandaperformanceanalysiswithsomepossibleenhancementispresented.NetworkSimulator(NS2)isusedtoobtaintheperformanceresultsofthetwoclassesusingdifferentmetricssuchasthroughput,packetdelayandpacketloss.ResultsofthesimulationshowthatOSPFhasabetterperformancethanRIPintermsofav

3、eragethroughputandpacketdelayindifferentnetworksizes,whileRIPisbetterthanOSPFintermsofnumberofpacketlossinlargenetworks.Keywords:DynamicRoutingProtocols,RIP,OSPF,NS21.INTRODUCTIONNetworksrelyonroutingprotocolstokeeptheroutingtablesupdated.Routingisusedinnetworkstocontro

4、landforwarddata.Foraroutertobeefficientandeffective,thecriticalfactoristhechoiceoftheroutingprotocol.Routingprotocolsfindapathbetweennetworknodes;ifmultiplepathsexistforagivennodethentheshortestpathisselectedbyprotocol.Eachprotocolhasacostmetricthatitappliestoeachpath.T

5、hepathwithlowestmetricisselectedbyprotocol.Metricstocompareoneroutingprotocolwithanotherarebasedonconvergencetimetoadapttotopologychanges,optimalityistochoosethebestpath,notnecessarilyatminimumcostbuttoensureaminimumdelayortominimizeoverheadandspacerequirementstostoreth

6、eroutingtable[1][5][7].Therestofpaperisorganizedasfollows:Section2isanoverviewofroutingprotocols.InSection3and4RIPandOSPFarediscussed.WestudiedRIPandOSPFbecausethisinteriorroutingprotocoliswidelyusedintheinternet.Inadditiontheprosandconsoftheseroutingprotocolsarestudied

7、inbrief.InSection5thesystemmodelusedforsimulationisexamined,andinSection6weimplementroutingprotocolsusingNS2.TheresultsofsimulationshowthatOSPFisbetterthanRIPinsomeaspects.ButinotheraspectsRIPisrevealedtobebetterthanOSPFinSection7.Finallyweconcludethepaper.2.ROUTINGPROT

8、OCOLSTherearetwotypesofroutingprotocols:staticordynamicroutingprotocols.Dynamicroutingprotocolsaresuperiorover