If your computer is unable to connect to your Ethernetnetwork, check to see that the Ethernet interface is listed on the left side of the network System Preferences pane.
如果你的计算机不能连接的以太网络，检查一下你的以太网卡是否列在网络设置面板的左侧。
2
An authentication server can reside in a dedicated computer, an Ethernet switch, an access point or a network access server.
身份验证服务器可以驻留在专用的电脑，一个以太网交换机，一个接入点或网络访问服务器。
3
The computernetwork subsystem is designed ethernet which is star connection structure.