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６０年代初，半导体技术的长足进步与计算机的普及，使通信事业发生了革命性的变化。Ｃ＆Ｃ已成为现代通信的同义语。计算机网络首先采用了网络体系结构的概念。ＩＢＭ公司提出的系统网络（ＳＮＡ）和国际标准化组织（ＩＳＯ）提出的开放系统互连（ＯＳＩ）参考模型都是数据通
In the early 1960s, advances in semiconductor technology and the popularization of computers revolutionized communications. C & C has become synonymous with modern communications. Computer network first adopted the concept of network architecture. The SNA proposed by IBM Corporation and the OSI reference model proposed by the International Organization for Standardization (ISO)