通过实验学习掌握了解有关二层交换机，三层交换机，以及路由器的基本知识；以及应用二层，三层交换机连同路由器间的配置从而实现不同VLAN之间的互通，不同计算机间的互连，实现网络之间的互连。了解并熟悉核心交换机以及路由器的管理与配置。-Through experiments to learn about the two-story master switches, three switches, and routers, the basic knowledge　as well as the application of two-story, three-switch configuration, together with the inter-router in order to achieve interoperability between different VLAN, between different computer interconnection between network interconnection. Understand and are familiar with the core switches and routers and configuration management.