The link layer provides the physical interface to the communication medium (such as an Ethernet device).
2
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.
3
由于以太网中的各种设备必需通物理层接口器件才能与网络传输介质相连,因此本部分主要介绍物理层器件。
Because all kinds of equipments in Ethernet must be though the physical layer interface devices can connected with network transmission media, thus this part mainly introduces the physic...