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1、ContentsAbstract2Chapter1LANTechnology31.1LANOverview31.1.1Thelocalareanetworktransmissionmedium31.2InterconnectionTechnology41.3TheExpansionofLANTechnology41.3.1repeater51.3.2Bridge51.3.3TheDifferenceBetweenLANAndWAN6Chapter2Switch72.1DefinitionofSwitch72.2.Pack
2、etSwitches82.3theprincipleofPacketSwitch92.4Switchfeaturesandbenefits9Chapter3Router123.1RouterDisposition123.1.1ConceptAndFunction123.2theroleofRouter163.3RoutingTableComputation163.4ACorporationrouterdisposition17Chapter4DesignaLAN184.1Designideas184.2Hub194.3M
3、odem204.4IPAddress214.5SafetyWork214.5.1Authenticationtechnology214.5.2Encryptiontechnology214.5.3Keyexchangeandmanagement224.6TheLANConfigurationSoftware224.6.1VPNGatewayTypeConfiguration224.7Servers254.7.1FTPServer254.7.2WebServer274.7.3DNSServer294.8Thestepsof
4、theseprojects29Chapter5Conclusion30References:3131SettingUpAVPNThroughLANAbstractInternetisdevelopatfullspeed,Internetbecomespeopleandobtains,releasesandtransmitstheimportantchannelofinformationfast,itisplayinganimportantroleonsuchallrespectsaspeople'spolitics,ec
5、onomy,living,etc.summedupthedesignofthelocalareanetworktechnologies,inparticular,illustratesthelocalareanetworkroutersintheapplication,withafocusonwide-areanetworkLANdesign,includingsystemdesignprinciplestechnologynetworkofchoice,premisesdistributionsystems,netwo
6、rktopologyandequipmentSelectionofthisdesigncanachievethebasicfunctionsofthevariousmodulestomeettheinternalneedsofvariousdepartmentsandultimatelydesignedasasimple,inexpensiveandeffectivepracticallocalareanetworkwithinthecompany.Keywords：LocalAreaNetwork(LAN)；route
7、r；vpn；InternetProtocolAddress31Chapter1LANTechnology1.1LANOverviewLANisasmallgeographicalareaofdatacommunicationsequipmentlinkedtothatofthecommunicationsnetwork.Fromthehardwarepointofview,Alocalareanetworkisaggregatesmadeupfromcomputers,networkadapterandtransmiss
8、ionmedium;fromthesoftwarepointofview,LANservicealotofresourcesharing,suchastheprovisionofdocuments,printing,communications;fromthearchitecturepointoftheview,LA
