Transmission is in the form of a data packet of a predetermined maximum size, determined by the number of nodes on the ring and the traffic to be supported; oversized transmissions are segmented, or fragmented. After transmitting, the station passes the token to a successor station, in a predetermined sequence. While the process is complex and overhead-intensive, its high level of control over the network avoids data collisions and increases throughput.
Related articles. Also Mentioned In. Words near token-passing in the Dictionary. Token Ring Protocol in computer networks consist of stations connected in the form of a ring.
There is a token that governs whether a station can transmit the data or not. Akshay Singhal. Publisher Name. Time taken by a bit to complete one revolution of the ring is called as ring latency. Time taken by the token to complete one revolution of the ring is called as cycle time. Each station holds the token until its data packet reaches back to it. It is sure that any break in the ring at any point will interrupt communications for all machines. To solve this problem, IBM developed a modified ring topology, which they called the logical ring physical star.
The central point of the physical star configuration is Token Ring hub called the multi-station access unit MSAU, pronounced as masow. It offers excellent throughput under high-load conditions. It has built-in troubleshooting mechanisms such as beaconing and auto-reconfiguration and may now be used with UTP cabling.
Few of the disadvantages of Token Ring are:.
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