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Token ring (rete ad anello)
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Principle of the token ring
The token ring is network access technology based on the principle of communicating in turn, i.e. each computer on the network has the opportunity to communicate in turn. It is a token (a data packet), circulating in a loop from one computer to another, which determines which computer has the right to transmit information.
When a computer has the token it can transmit for a determined length of time, after which the token is passed to the next computer.
In reality, the computers on a "token ring" network are not arranged in a loop, but are connected by a dispatcher (called MAU or Multistation Access Unit) which will give each of them the opportunity to "speak" successively.