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1、SwitchingtechnologypresentsituationanddevelopmenttrendAbstract：Directioninthefuture,moreextensiblefeatureswillbecometheimportantcharacteristicsofanewgenerationofInternet,theexchangeoftechnology,willbeasakeytechnologytohostthisextensiblefeatures.Switchingtechnologyinscale,function,performance,safet
2、yandserviceandotheraspectshavebetterextensibilityfeatures,willbeanewgenerationofInternetarchitectureinthefuture.Keywords:Networktechnology;TheInternet;Switchingtechnology1ThepresentsituationoftheexchangeoftechnologyTherapiddevelopmentofnetworktechnology,Ethernetisalwaysdominant.However,withthedeep
3、eningofthenetworktechnologyapplication,thenetworkdevelopmentscaleandspeedarespeeding.NotonlythespeedoftheLANgotimproved,gigabitEthernetalsograduallybecamepopular.attentiontonetworkofhighreliability,highperformance,easymaintenanceandreducedcost,andthesefactorsisdependentontheusingkindofnetworkingte
4、chnology;Equipmentvendorswouldonthebasisofnotharmtheinterestsoftheusernetworkfunctionsandpursuetheconsiderableprofit.Aboutthenetwork,therehavebeenamaturetraditionallayer2switchingtechnology,andthefunctionoftheroutinglayer3,andahighservicelevelofnetworklayer7.2switchingtechnologyofAsingletraditiona
5、llayer2.Moretraditionallayer2switchingtechnology,isaspecialsingle,itcontainsonlythedatalinklayerforward.Layer2switchingtechnologyismostlyusedforsmalllocalareanetwork(LAN),themachineNumberskeepin20or30setsofthefollowingisthesecurityofthenetworkenvironment,fastswitchingfunction,multipleaccessport,lo
6、wpricewhichthethreelayer2switchingtechnologyhashassolvetheproblemthatthesmallnetworkusers.2.1ThethirdlayerswitchingtechnologywithroutingfunctionInordertosolvetheproblemsofthebroadcastdomain,forthefirsttimein1997thethirdlayerswitchingtechnologywithroutingfunctionappeared.Layer3switchingtechnologyha
7、snowbecomeamainforceoftheconstructionofmultiplebusinessfusionnetwork.Usingalargelocalareanetwork(LAN),canincreasethedangersofbroadcaststorm,inordertoreducetheharm,wemustdividealargelocalareanetwork(LAN)accordingt
