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.ItalsooutlinestheprosandconsofRIPandOSPFprotocolsandaperformanceana

2、lysiswithsomepossibleenhancementispresented.NetworkSimulator(NS2)isusedtoobtaintheperformanceresultsofthetwoclassesusingdifferentmetricssuchasthroughput,packetdelayandpacketloss.ResultsofthesimulationshowthatOSPFhasabetterperformancethanRIPintermsofaveragethroughputandpacketdelayindiffere

3、ntnetworksizes,whileRIPisbetterthanOSPFintermsofnumberofpacketlossinlargenetworks.Keywords:DynamicRoutingProtocols,RIP,OSPF,NS21.INTRODUCTIONNetworksrelyonroutingprotocolstokeeptheroutingtablesupdated.Routingisusedinnetworkstocontrolandforwarddata.Foraroutertobeefficientandeffective,thecr

4、iticalfactoristhechoiceoftheroutingprotocol.Routingprotocolsfindapathbetweennetworknodes;ifmultiplepathsexistforagivennodethentheshortestpathisselectedbyprotocol.Eachprotocolhasacostmetricthatitappliestoeachpath.Thepathwithlowestmetricisselectedbyprotocol.Metricstocompareoneroutingprotoco

5、lwithanotherarebasedonconvergencetimetoadapttotopologychanges,optimalityistochoosethebestpath,notnecessarilyatminimumcostbuttoensureaminimumdelayortominimizeoverheadandspacerequirementstostoretheroutingtable[1][5][7].Therestofpaperisorganizedasfollows:Section2isanoverviewofroutingprotocol

6、s.InSection3and4RIPandOSPFarediscussed.WestudiedRIPandOSPFbecausethisinteriorroutingprotocoliswidelyusedintheinternet.Inadditiontheprosandconsoftheseroutingprotocolsarestudiedinbrief.InSection5thesystemmodelusedforsimulationisexamined,andinSection6weimplementroutingprotocolsusingNS2.There

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