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本文首先考察了局域网,特别是局域网中处于OSI(开放系统互连)模型第三层的网络层标准化的现状,提出了进行标准选择的若干原则,指出X. 25PLP(分组层协议)一1984是一个比较适当的协议选择;同时依据所述原则,对该协议进行了适当的选择和扩充。 计算机网络的发展已有十五年以上的历史。作为技术推进到更高阶段而形成的局域网(LAN),其历史也有十多年了。有关网络的标准化问题自78年(局域网自80年)正式提出后,越来越受重视,进展也越来越快。国际上,在ISO的内部,已初步形成了一个计算机网络的标准体系。80年开始的局域网标准化工作虽说进展很大,但就整个标准体系来说,还只是初具雏形。使其完善化还有很多工作要做,这也是本文所关心的问题。如不特别声明,在我们的行文中,网络是指局域网。
This paper first examines the LAN, especially in the LAN OSI (Open Systems Interconnection) the third layer of the network layer standardization of the status quo, put forward the criteria for the selection of a number of principles, that X. 25PLP (packet layer protocol) 1984 is a A more appropriate choice of agreement; at the same time based on the principle of the agreement has been the appropriate choice and expansion. The development of computer networks has more than 15 years of history. As a technology to advance to a higher stage and the formation of the local area network (LAN), its history has more than 10 years. Since the standardization of the Internet was formally put forward in 1978 (local area network since 1980), more and more attention has been paid to the standardization of the Internet. Internationally, within the ISO, a standard system of computer networks has been initially formed. Although the standardization of LANs started in 1980 has made great progress, it has only taken shape for the entire standard system. To make it perfect there is a lot of work to be done, this is also the concern of this article. Unless otherwise stated, in our context, network refers to a local area network.