1、控制客户端数据库配置文件中有计算机名、IP、MAC三项记录，最后结束是_END标志，这个不能随便删；

2、关机提前通知时间是20秒，可以在程序中设置；

3、利用UDP协议发送开关机命令；

4、可以建立计算机信息数据库，用于控制大量计算机，由于其信息较少所以可以采用访问配置文件那样来读计算机信息。

-1, control, database configuration file, the client has the computer name, IP, MAC three records, and finally ended yes _END signs, this can not be easily deleted　2 off advance notice period is 20 seconds, you can set in the program　3 using UDP protocol to send switch machine command　4, you can create a computer database, used to control a large number of computers, less so because of their information can be used as access to the configuration file to read the computer information.