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响应时间和时延的确定性对控制网络是至关重要的。结合控制网络的确定性，从协议的体系结构出发，分析了几种常见的控制网络介质访问控制协议，讨论在网络重载情形下它们各自的优缺点。
The certainty of response time and delay is crucial to the control network. In combination with the certainty of control network, several common protocols for controlling access control of media are analyzed from the architecture of the protocol, and their advantages and disadvantages are discussed in the case of network overloading.