Token Ring

The IEEE 802.5 Token Ring protocol provides a deterministic method of shared media access. Two standards exist, one with 4-Mbit/sec operation and the other with 16-Mbit/sec operation. One station, designed the active monitor, initiates a short Frame (token) around the ring. Stations sequentially capture the token and are allowed to access the ring until Transmission is completed or the token time-out has expired. The token is then passed to the next station.

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