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1、VLAN技术在校园网中的应用大冷蒙古族九年制学校---------李东方中文摘要VLAN(VirtualLocalAreaNetwork)的中文名为“虚拟局域网”。VLAN是一种将局域网设备从逻辑上划分成一个个网段，从而实现虚拟工作组的新兴数据交换技术。这一新兴技术主要应用于交换机和路由器中，但主流应用还是在交换机之中。但又不是所有交换机都具有此功能，只有VLAN协议的第三层以上交换机才具有此功能。VLAN在逻辑上等价于广播域。更具体的说，我们可以将VLAN类比成一组最终用户的集合。这些用户可以处在不同的物
2、理LAN上，但他们之间可以象在同一个LAN上那样自由通信而不受物理位置的限制。在这里，网络的定义和划分与物理位置和物理连接是没有任何必然联系的。网络管理员可以根据不同的需要，通过相应的网络软件灵活的建立和配置虚拟网，并为每个虚拟网分配它所需要的带宽。随着校园网的不断发展，规模在不断扩大，用户在不断增加，网络应用也在不断增长，网络变得越来越拥挤，冲突不断产生，管理难度日益加大。学校内部对于灵活、动态地组建LAN网段的要求也越来越多，客观上要求LAN本身的结构可以实现动态组建、调整和管理。为了有效地提高网络管理
3、的灵活性，提高网络效率和网络安全性，充分合理地进行VLAN划分，是必需的。关键词：VLAN；交换机；广播域；配置；规划；管理；局域网；AbstractVLAN(VirtualLocalAreaNetwork)Chinesenamed“virtuallocalareanetwork”.VLANisonekinddivideslogicallythelocalareanetworkequipmenteachonewebpage,thusrealizesthehypothesizedworkteam'semerg
4、ingdataexchangetechnology.Thisemergingtechnologymainlyappliesintheswitchboardandtherouter,butmainstreamapplicationinswitchboard.Butisnotallswitchboardshasthisfunction,onlythentheVLANagreement'sthirdaboveswitchboardonlythenhasthisfunction.VLANistosolveoneki
5、ndofagreementwhichfastEthernet'sbroadcastquestionandthesecurityproposed,itincreasedtheVLANheadinthefastEthernetframe'sfoundation,withVLANIDtheuserpartingforayoungerworkteam,usertwoexchangevisitsbetweenthelimitdifferentworkteam's,eachworkteamisavirtuallocal
6、areanetwork.Virtuallocalareanetwork'sadvantageismaylimitthebroadcastingarea,andcanformthehypothesizedworkteam,dynamicmanagementnetwork.Alongwiththecampusnet'sunceasingdevelopment,thescaleisexpandingunceasingly,theuserisincreasingunceasingly,thenetworkappli
7、cationunceasinglyisalsogrowing,thenetworkbecomesmoreandmorecrowded,theconflictproducesunceasingly,managesthedifficultytoenlargedaybyday.Theschoolinteriorregardingnimble,dynamicsetsuptheLANwebpagetherequesttobealsogettingmoreandmore,objectivelyrequestsLANst
8、ructuretobepossibletorealizedynamicsetsup,theadjustmentandthemanagement.Toenhancethenetworkmanagementeffectivelytheflexibility,raisesthenetworkefficiencyandthenetworksecurity,carriesontheVLANdivisionreasonabl
