Question

Comparison between token bus and token ring

Answer 1

Token Bus was a 4 MbpsLocal Area Networkingtechnology created by IBM to connect their terminals to IBMmainframes. Token bus utilized a copper coaxial cable to connect multiple end stations (terminals, wokstations, shared printers etc.) to the mainframe. The coaxial cable served as a common communication bus and a token was created by the Token Bus protocol to manage or 'arbitrate' access to the bus. Any station that holds the token packet has permission to transmit data. The station releases the token when it is done communicating or when a higher priority device needs to transmit (such as the mainframe). This keeps two or more devices from transmitting information on the bus at the same time and accidentally

Answer 2

Token bus is a network implementing the token ringprotocol over a "virtual ring" on a coaxial cable. A token is passed around the network nodes and only the node possessing the token may transmit. ...

The main difference is that the endpoints of the bus do not meet to form a physical ring.