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当前,ISO 已正式认可 IEEE802所建议的三种典型访问协议:CSMA/CD、令牌环与令牌总线,并将它们确立力局部网络标准草案。这对局部网络技术的发展无疑会产生深远的影响。国外不少公司已相继推出实现这三种典型访问协议集成芯片,其中包括英特尔公司的局部通信控制器(LCC)82586和以太网串行接口(ESI)82501,IBM 的令牌环芯片,美国微型机设备公司的以太局网控制器,数字设备公司的 AM7990,Sceq 技术公司的3001以及日本富士通公司的 MB61301和 MB502等等。CSMA/CD、令牌环与令牌总线作为现代局部网
Currently, ISO has formally approved the three typical access protocols proposed by IEEE802: CSMA / CD, Token Ring and Token Bus, and established them as draft local network standards. This development of local network technology will undoubtedly have a profound impact. Many foreign companies have successively introduced integrated chips to implement these three typical access protocols, including Intel Corporation’s Local Communication Controller (LCC) 82586 and Ethernet Serial Interface (ESI) 82501, IBM’s Token Ring chip, the United States Micro Ethernet equipment controller company LAN, digital equipment company AM7990, Sceq Technologies 3001 and Japan’s Fujitsu MB61301 and MB502 and so on. CSMA / CD, Token Ring and Token Bus as a modern local area network