局域网的多点访问方式主要有固定分配，随机分配和按需分配三大类型。本篇文章主要分析随机分配方式网络的各种性能指标，包括在各种协议工作方式下的输入业务量，吞吐量，平均归一化传输时延，系统稳定性等。-LAN multi-access methods are mainly fixed allocation, random allocation and distribution according to need three types. Various performance indicators This article analyzes the random distribution of the network, including input traffic under various protocols work, throughput, average normalized transmission delay, the system stability.