A LAN (local area network) formed in a bus topology (stations connected to a single, shared data highway) that uses token passing as a means of regulating traffic on the line. On a token bus network, a token governing the right to transmit is passed from one station to another, and each station holds the token for a brief time, during which it alone can transmit information. The token is transferred in order of priority from an upstream station to the next downstream station, which might or might not be the next station on the bus. In essence, the token circles through the network in a logical ring rather than a physical one. Token bus networks are defined in the IEEE 802.4 standards. See also bus network, IEEE 802 standards, token passing. Compare token ring network.
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