论文部分内容阅读
论述了常用的三种数据传输方式──以X.25为代表的分组交换、帧中继、异步传输模式。介绍了每一种传输方式的特点，对三种传输方式网络上的各种特性进行了比较分析。
Discussed the commonly used three kinds of data transmission ─ ─ X.25 as the representative of packet switching, frame relay, asynchronous transmission mode. The characteristics of each transmission mode are introduced, and various characteristics of the three transmission modes are compared and analyzed.