Token bus 802.4

• token bus is network implementing token ring protocol,over a virtual ring on a co-axial cable


• Token bus was standardized by IEEE 802.4


• It is mainly used for industrial application


• IEEE 802.4 token bus network are constructed with 75 ohm coaxial cable using a bus topology


• The token and frames of data are passed from one station to another following the numeric sequence of the station addresses


• Then the token follows a logical ring rather then a physical ring