这种授时方式是在服务器处配置时钟装置，该装置通过串口将时钟信号接入服务器，由服务器通过网络采用广播方式发出授时命令，对其下的各个工作站进行授时。网络授时方式可采用多种网络授时协议，如Time协议，Daytime协议，网络时间协议NTP，简单网络时间协议SNTP，PTP协议等。本课题采用NTP协议，采用这种方式可以获得几毫秒到几十毫秒的同步精度。

-This timing mode is configured at the server clock means the clock signal through the serial port access server, issue the command delegated by the server broadcasts over the network, carried out under its individual workstations timing. Approach can be granted multiple network network timing protocols such as Time Protocol, Daytime protocol, Network Time Protocol NTP, Simple Network Time Protocol SNTP, PTP protocols. This paper uses the NTP protocol, this way you can get a few milliseconds to tens of milliseconds synchronization accuracy.