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一、引言计算机网络大体上从终端(?)计算机网发展到计算机(?)计算机公共数据网。接着,微型计算机的出现,形成了微机的高速局部网络。另一方面,微型机与大型机或小型机之间连接的通信网络也成了一个研究的热门课题。微机一旦和大型机或小型机连接,便能充分发挥它的作用,这一点目前已被实践所证实。
I. INTRODUCTION Computer network generally develops from the terminal (?) Computer network to the computer (?) Computer public data network. Then, the emergence of microcomputers, the formation of high-speed computer local area network. On the other hand, the communication network between microcomputers and mainframes or minicomputers has also become a hot topic of research. Once the computer and the mainframe or minicomputer connection, we can give full play to its role, which has now been confirmed by practice.