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1、E-LearningenvironmentnetworkWiththerapiddevelopmentofnetworktechnology,especiallydigitalcampusandtheconstructionofeducationalinformationneedsofthecampusnetworkhavebecomeincreasinglydemanding.Intermsofspeed,campusnetworkbackbonespeedincreasefromthefirst100Mbpsto10,000Mbps(10Gbps).Intheagreement,fr
2、ompasttoupgradetotheIPv4IPv6.Inthesegmenthasalsobeenaqualitativebreakthrough:fromtheearlydevelopmentofthesharedmediumlocalareanetworktothecurrentswitchedLAN.SwitchedLANtechnologyenablesbandwidthofdedicatedusersasopposedtogreatlyimprovetheefficiencyoflocalareanetworktransmission.Inaddition,suchast
3、hebroadbandintelligentnetwork,intelligentopticalnetworking,opticalfibercommunicationnetworkandsoftswitchtechnology,newnetworktechnologiesareemerging.Weregiventhefollowingset1Multi-layerswitchingtechnologyparknetworknetwork.Convergencelayergenerallyfarawayfromthenetworkcenter,theneedfordozensofbui
4、ldingsafewblocksoraccessswitchconvergence,foraregionalnetworking.Accesslayergenerallylocatedwithinabuilding,orthefloorforGailoucomputerterminalnetwork.Asthemorecomplexthestructureofthecampusnetwork,themanagementbemorenumberofcomputers,inordertobettermanagethenetwork,improvenetworkefficiency,thela
5、yeredswitchingtechnologyinvolved.Amongthem,thethirdlayerswitchingtechnologyisoperationalinthethirdlayernetworkprotocolisaroutingdeviceandcanbeplayedtounderstandtheroleoftheroutingdecision;fast,almosttothesecondtierexchangerate.Here,wediscussanexampleofaparkshouldbeconsideredinnetworkdesignandnetw
6、orkswitchingelements.Thecurrentnetworkarchitecturewithlayeredstructureare:corelayer,convergencelayerandaccesslayer.Fromthenetworkprotocollevelcanbedividedintothefirstlayer,secondlayer,thirdlayer....Thestructureofthenetworksystem,thecorelayerinthenetworkengineroom,responsibleforthemanagementofthee
7、ntirecampusnetwork.Convergencelayergenerallyfarawayfromthenetworkcenter,theneedfordozensofbuildingsafewblocksoraccessswitchconvergence,foraregionalnetworking.Accesslayergenerallylocatedwithinabuilding,orthefloorforGail