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.ItalsooutlinestheprosandconsofRIPandOSPFprotocolsandaperformancean

2、alysiswithsomepossibleenhancementispresented.NetworkSimulator(NS2)isusedtoobtaintheperformanceresultsofthetwoclassesusingdifferentmetricssuchasthroughput,packetdelayandpacketloss.ResultsofthesimulationshowthatOSPFhasabetterperformancethanRIPintermsofaveragethroughputandpacketdelayindiffe

3、rentnetworksizes,whileRIPisbetterthanOSPFintermsofnumberofpacketlossinlargenetworks.Keywords:DynamicRoutingProtocols,RIP,OSPF,NS21.INTRODUCTIONNetworksrelyonroutingprotocolstokeeptheroutingtablesupdated.Routingisusedinnetworkstocontrolandforwarddata.Foraroutertobeefficientandeffective,th

4、ecriticalfactoristhechoiceoftheroutingprotocol.Routingprotocolsfindapathbetweennetworknodes;ifmultiplepathsexistforagivennodethentheshortestpathisselectedbyprotocol.Eachprotocolhasacostmetricthatitappliestoeachpath.Thepathwithlowestmetricisselectedbyprotocol.Metricstocompareoneroutingpro

5、tocolwithanotherarebasedonconvergencetimetoadapttotopologychanges,optimalityistochoosethebestpath,notnecessarilyatminimumcostbuttoensureaminimumdelayortominimizeoverheadandspacerequirementstostoretheroutingtable[1][5][7].Therestofpaperisorganizedasfollows:Section2isanoverviewofroutingpro

6、tocols.InSection3and4RIPandOSPFarediscussed.WestudiedRIPandOSPFbecausethisinteriorroutingprotocoliswidelyusedintheinternet.Inadditiontheprosandconsoftheseroutingprotocolsarestudiedinbrief.InSection5thesystemmodelusedforsimulationisexamined,andinSection6weimplementroutingprotocolsusingNS2

7、.TheresultsofsimulationshowthatOSPFisbetterthanRIPinsomeaspects.ButinotheraspectsRIPisrevealedtobebetterthanOSPFinSection7.Finallyweconcludethepaper.2.ROUTINGPROTOCOLSTherearetwotypesofroutingprotocols:staticordynamicroutingprotocols.Dynamicroutingprotocolsaresuperiorover