路由器连接两个或多个逻辑子网，不一定地图一对一的物理接口的路由器。
Routers connect two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router.
因此，尽管可以在物理接口上修改介质速度和双工模式，但是要在逻辑接口上设置IP地址和子网。
So, although you can change the media speed and duplex on the physical interface, you set up the IP address and subnet on the logical interface.
接口节点与子网的物理或逻辑连接的表示形式。
Interface The representation of a physical or logical attachment of a node to a subnet.
文章从子网掩码的概念入手，主要分析了常用子网掩码和变长掩码的结构，通过对逻辑关系的理解，验证了划分子网捷径的方法。
The paper focuses on the architecture of subnet mask and long mask, verifying the partition method of subnet shortcut via understanding of logic relations.
技术上说，VPN是指将物理上分布在不同地点的网络，通过公用骨干网连接而形成的逻辑上的虚拟子网。
In technology, VPN means the networks locating in the different places are connected by main public networks, which shape the logic networks.
技术上说，VPN是指将物理上分布在不同地点的网络，通过公用骨干网连接而形成的逻辑上的虚拟子网。
In technology, VPN means the networks locating in the different places are connected by main public networks, which shape the logic networks.
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