通信协议要求:

1.　　定时数据通信：每秒钟每台计算机分别交换10、20、30、40、50个字节的数据。

2.　　广播通信：每十秒中，发布广播数据对各个计算机的时钟进行同步。

3.　　错误检测：CRC错误检测，有错误时，采用相应的错误处理程序。

4.　　网络管理：随时获知网络中各节点的工作状态，当有节点故障退出网络或新的节点加入网络时，能够记录网络状态。

-Communication protocol requirements: 1. The timing data communication: every seconds each computer respectively exchange ten and twenty, thirty, forty, fifty bytes of data. 2. Broadcast communication: every ten seconds, release broadcast data to each computer s clock for synchronization. 3. Error detection: CRC error detection, error, the corresponding error handling procedure. 4. Network management: always acknowledge of each node in network work state, when a node fault exit network or the new node to join the network, to record the network state.