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A token ring network is a local area network (LAN) topology where nodes/stations are arranged in a ring topology. Data passes sequentially between nodes on the network until it returns to the source station. To prevent congestion and collision, a token ring topology uses a token to ensure that only one node/station on the line is used at a time, thereby easily denoting media users of its activity.
A token ring LAN is physically wired as a star topology but configured as a ring topology.
The token ring LAN system was standardized by the Institute of Electrical and Electronics Engineers as IEEE 802.5.
Initially, the token ring LAN highlighted, debated advantages over the Ethernet. During the 1990s, token-ring LAN pricing and usage gradually declined as switched Ethernet and faster variants hit the market.
In the mid-1980s, token ring LAN speeds were standardized between 4 and 16 Mbps.
The token ring LAN process is delineated by the following sequence of events: