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一、引言局部网络一般是在一个局部区域内使用,对于这种典型的使用,国内外有不少人进行过开发研究,并取得了可喜的成绩。但随着计算机信息通信的日趋繁重,所要求的已不是本地网络和单一的通信技术所能满足的。因此,网络技术必须进一步发展,其中重要的一条就是要实现网络互连,包括局部网之间的连接以及局部网与公用网之间的连接。
I. Introduction Local networks are generally used in a local area. For this typical use, many people both at home and abroad have conducted research and development and achieved gratifying results. However, as computer information communication becomes more and more burdensome, what is required is no longer satisfied by the local network and a single communication technology. Therefore, the network technology must be further developed, one of the important ones is to achieve network interconnection, including the connection between local networks and between local networks and public networks.