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一、概述自70年代中期以来,随着VLSI技术和微型计算机的不断发展,计算机技术在办公自动化和工厂自动化方面的应用日益扩展,形形色色的局部计算机网络大量涌现。为了进一步降低成本和在更大范围内互连,标准化的问题显得十分迫切。各标准化组织都在从事局域网协议标准化的工作,并陆续颁布了一些标准。其中最为著名的有美国电气电子工程师协会(IEEE)的IEEE 802、国际标准化组织(ISO)的ISO 8802和国际电工委员会(IEC)的PROWAY。此外,还有由某些
I. Overview Since the mid-1970s, with the continuous development of VLSI technology and microcomputers, the application of computer technology in office automation and factory automation has been expanding day by day. A large number of local computer networks have emerged. In order to further reduce costs and interconnect in a larger area, the issue of standardization becomes very urgent. Various standardization organizations are engaged in the standardization of LAN protocol work, and have promulgated some standards. One of the best known is IEEE 802 IEEE, ISO 8802 of the International Organization for Standardization (ISO) and PROWAY of the International Electrotechnical Commission (IEC). In addition, there are some