You have complete control of the server's status, so you are able to test single updates before releasing them on the update server and to disconnect the server from the Internet.
您完全控制服务器的状态，所以能够先测试更新，然后再把它们放在更新服务器上，还可以断开服务器与Internet的连接。
Basically, ping sends Internet Control Message Protocol (ICMP) packets from your server to the destination server, and then receives a response from the destination server.
基本上，ping从您的服务器向目标服务器发送Internet控制消息协议(Internet Control Message Protocol, ICMP)数据包，然后接收来自目标服务器的响应。
Internet remote control enables remote monitoring and control of a Internet connection. It also enables message communication between connected users and remote program execution on the server.
能够远程监视和控制网络线路的连接，它也可以使用户之间进行通信，执行远程服务器上的程序。
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