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七十年代初,局部地区网络开始得到研究和发展。最初仅在大学和研究单位中进行。经过十多年的发展,目前已产生了大量的网络产品,其中较为成熟的网络有美国Xerox的Et-hernet,Corvus Systems的Omninet,Crom-enco的C-net,Nestar的Cluster/One,Mo-del A,Wang的Wang Net,英国的Camb-ridge Ring,日本京都大学的Labolink等等。这些网络在拓扑结构、传输速率、传输介质、网络访问方式等方面各有特色,应用环境也各不相同。目前已在办公室自动化、工业过程控
In the early seventies, local regional networks began to be studied and developed. Initially only in universities and research units. After more than a decade of development, a large number of network products have been produced. Among them, Et-hernet from Xerox in the United States, Omninet from Corvus Systems, C-net from Crom-enco, Cluster / One from Nestar, del A, Wang Wang from Wang, Camb-ridge Ring from Great Britain, Labolink from Kyoto University, Japan, and many others. These networks have their own characteristics in terms of topology, transmission rate, transmission medium and network access methods, and their application environments are also different. Currently in office automation, industrial process control