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数据通信是指计算机与计算机之间交换数据的过程。数据通信系统是指以计算机为中心,用通信线路联接分布在各地的数据终端设备而实行数据传输功能的系统。
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(Data communication refers to the process of exchanging data between computers. A data communication system refers to a system that takes a computer as the center and uses communication lines to connect data terminal equipment distributed in various places to implement data transmission functions.
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