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一、令牌环网的基本概念与特点 当今使用的另一个主要的LAN技术是令牌环网。IEEE802.5规范中规定了令牌环网的规则,像以太网一样,令牌网协议在OSI模型的物理和数据链路层上提供了各种服务。令牌网可以按4Mbit/s或者16Mbit/s两种突跳的数据速率运行。 令牌环网上使用的访问方法称之为令牌传递,令牌传递是一种判定性的访问方法,它靠保证任一给定时刻只有一个站可以发送来防止冲突。其方法是:沿着环从一个站向另一站传递一个称为令牌的专用数据包。只有当一个站取得空余的令牌时,它才能发送
First, the basic concepts and characteristics of Token Ring Another main LAN technology used today is Token Ring. The IEEE 802.5 specification specifies the rules for Token Ring, which, like Ethernet, provides various services at the physical and data link layers of the OSI model. Token network can be 4Mbit / s or 16Mbit / s two kinds of sudden jump data rates. The access method used on the token ring network is called token passing. Token passing is a decisive access method that prevents collisions by ensuring that only one station can send at any given moment. This is done by passing a dedicated packet called a token along a ring from one station to another. Only when a station to obtain an empty token, it can send