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1、SwitchingtechnologypresentsituationanddevelopmenttrendAbstract：Directioninthefuture,moreextensiblefeatureswillbecometheimportantcharacteristicsofanewgenerationofInternet,theexchangeoftechnology,willbeasakeytechnologytohostthisextensiblefeatures.Switchingtechnologyinscale,function,perfo
2、rmance,safetyandserviceandotheraspectshavebetterextensibilityfeatures,willbeanewgenerationofInternetarchitectureinthefuture.Keywords:Networktechnology;TheInternet;Switchingtechnology1ThepresentsituationoftheexchangeoftechnologyTherapiddevelopmentofnetworktechnology,Ethernetisalwaysdomi
3、nant.However,withthedeepeningofthenetworktechnologyapplication,thenetworkdevelopmentscaleandspeedarespeeding.NotonlythespeedoftheLANgotimproved,gigabitEthernetalsograduallybecamepopular.attentiontonetworkofhighreliability,highperformance,easymaintenanceandreducedcost,andthesefactorsisd
4、ependentontheusingkindofnetworkingtechnology;Equipmentvendorswouldonthebasisofnotharmtheinterestsoftheusernetworkfunctionsandpursuetheconsiderableprofit.Aboutthenetwork,therehavebeenamaturetraditionallayer2switchingtechnology,andthefunctionoftheroutinglayer3,andahighservicelevelofnetwo
5、rklayer7.2switchingtechnologyofAsingletraditionallayer2.Moretraditionallayer2switchingtechnology,isaspecialsingle,itcontainsonlythedatalinklayerforward.Layer2switchingtechnologyismostlyusedforsmalllocalareanetwork(LAN),themachineNumberskeepin20or30setsofthefollowingisthesecurityofthene
6、tworkenvironment,fastswitchingfunction,multipleaccessport,lowpricewhichthethreelayer2switchingtechnologyhashassolvetheproblemthatthesmallnetworkusers.2.1ThethirdlayerswitchingtechnologywithroutingfunctionInordertosolvetheproblemsofthebroadcastdomain,forthefirsttimein1997thethirdlayersw
7、itchingtechnologywithroutingfunctionappeared.Layer3switchingtechnologyhasnowbecomeamainforceoftheconstructionofmultiplebusinessfusionnetwork.Usingalargelocalareanetwork(LAN),canincreasethedangersofbroadcaststorm,inordertoreducetheharm,wemustdividealargelocalareanetwork(LAN)accordingt
