集线器

在区域网中，路由器的首要作用是网络联接和路由选择，即联接底层各个底层网络单位园区网，一同担任底层网络之间的数据转发。

(In the local area network, the primary role of the router is network connection and routing, that is, connecting the campus network of the underlying network units, and serving as the data forwarding between the underlying networks.)

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