局部计算机网络不仅在美国而且在全世界已经引起了广泛的兴趣并大大地激励了人们的想像力。一个标准的网络可以成为将工厂及办公室内自动化系统的各组成部分联成一个整体的骨干成分。早在1979年10月就有人确定了局部计算机网络系统的44个主要概念,并将它们分成了7类。其中一些是在大学中开发的,另一些是工业界开发的。各 Local computer networks have aroused widespread interest not only in the United States but throughout the world and have greatly inspired people’s imagination. A standard network can be a backbone component that unites the various components of an automated system in a factory or office. As early as October 1979, 44 key concepts of the local computer network system were identified and divided into seven categories. Some are developed at universities and others are developed by industry. each