一、前言随着微计算机大量普及,微计算机局部网络也广为发展,其中采用CSMA网络访问控制方式的局部网络(以Ethernet为代表)已得到了普遍的应用。 CSMA网络访问控制方式就是网上所有站点在发送信息前先探测介质上是否有信息传递,若无,则向传输介质发送信息;若有,则推迟发送直到介质空闲为止。当两个以上的站点同时探测到介质上没有信息传输,都试图发送自己的信息时,就会产生冲突。其解决的 I. INTRODUCTION With the popularization of microcomputer, the local network of microcomputer has been widely developed. The local network (represented by Ethernet) adopting CSMA network access control method has been widely used. CSMA network access control method is to detect all sites on the network prior to sending information on whether there is information transmission medium, if not, then send information to the transmission medium; if so, postponed until the media is idle. When more than two sites simultaneously detect no media on the transmission of information, are trying to send their own information, it will have a conflict. Its solution