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根据华东地质学院校园网二期建设项目，简要介绍了本院校园网的拓扑结构图、校园网采用的ＶＬＡＮ技术及其第三层交换（ 路由） 技术，阐述了校园网建设中子网划分与ＩＰ地址分配方法。
According to the second phase of East China Geological College campus network construction project, this paper briefly introduces the topological structure of campus network, VLAN technology used in campus network and the third layer of exchange (routing) technology, describes the construction of campus network subnetting and IP address allocation method.