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Qu'est-ce (qui) est Token Bus - définition

COMPUTER NETWORK ARCHITECTURE

Token Bus; IEEE 802.4; 802.4; Token-bus network; Token bus

token bus

<networking> (IEEE 802.4) A networking protocol which mediates access to a bus topology network as though it were a {token ring}. This eliminates the collisions found in {carrier sense collision detect} protocols. Nodes can be configured to pass the token in any order, not necessarily related to their physical ordering on the bus. The token is sent from one node to its successor in the logical ring by broadcast on the bus and is ignored by the other nodes. (1996-12-13)

IEEE 802.4

<networking, standard> The IEEE Token Bus standard. (1996-12-12)

Token coin

PHYSICAL COIN-LIKE OBJECT USED INSTEAD OF COINS

Token (numismatics); Token (Numismatics); Token coins; Subway token; Subway Token; Arcade token; Game token; Private coin; Trade token; Fare token; Provincial token

In numismatics, token coins or trade tokens are coin-like objects used instead of coins. The field of token coins is part of exonumia and token coins are token money.

https://en.wikipedia.org/wiki/Token_coin

Wikipédia

Token bus network

Token bus is a network implementing a Token Ring protocol 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. If a node doesn't have anything to send, the token is passed on to the next node on the virtual ring. Each node must know the address of its neighbour in the ring, so a special protocol is needed to notify the other nodes of connections to, and disconnections from, the ring.

Ethernet's access protocol could not absolutely guarantee a maximum time any station would have to wait to access the network, so was thought to be unsuitable for manufacturing automation applications. The Token bus protocol was created to combine the benefits of a physical bus network with the deterministic access protocol of a Token Ring network.

Token bus was standardized by IEEE standard 802.4. It was mainly used for industrial applications. Token bus was used by General Motors for their Manufacturing Automation Protocol (MAP) standardization effort. This is an application of the concepts used in Token Ring networks. The main difference is that the endpoints of the bus do not meet to form a physical ring.

In order to guarantee the packet delay and transmission in Token bus protocol, a modified Token bus was proposed in Manufacturing Automation Systems and flexible manufacturing system (FMS).

A means for carrying Internet Protocol over IEEE 802 networks, including token bus networks, was developed.

The IEEE 802.4 Working Group has disbanded and the standard has been withdrawn by the IEEE.

https://en.wikipedia.org/wiki/Token bus network