token passing
Quick Summary
Token passing is a method used in some computer networks, particularly broadcast networks, to manage access to the communications channel. In this system, a special "token" packet circulates among the network nodes. Only the node possessing the token is permitted to transmit data; all other nodes act as listeners. This ensures an orderly flow of information and prevents collisions that can occur when multiple nodes attempt to transmit simultaneously. Token passing is a form of scheduled access, contrasting with random access methods where nodes attempt to transmit when the channel appears free.1
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