Token Bus is a networking technology that uses the token method to control access to the medium and avoid collisions. The logical ring required for this is mapp onto a physical bus structure. The method is very suitable for network applications that require deterministic transmission behavior.
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The token bus is specified in the IEEE 802.4 standard. It is a networking technology with specifications for layers 1 and 2 of the ISO/OSI layer model . Among other things, the physical layer. The media access method and the protocols and frame formats of the data Albania Phone Number List link layer are defined. The token bus is transparent for higher-level protocols such as the Internet Protocol, which is why any network application can be operated on the basis of the networking technology of a token bus.
Due to the token procedure for transmission control and collision phone avoidance. The token bus is very well suited for network applications that require deterministic transmission behavior. As in a token ring (IEEE 802.5). A token regulates permission to send data. The token is logically passed on between the individual stations in a defined order.
For this purpose a logical ring is mapp
Onto the physical bus structure. In contrast to the token ring. The order is not determine by the wiring of the stations to the ring line distributor. But is specified by the addresses of the stations.
A station passes the token to the station with the Cell Phone Number Database next lower address. The station with the lowest address closes the ring by passing the token to the station with the highest address.
Typical areas of application are networking and automation in industry. Networking technologies such as ARCNET (Attache Resource Computer Network) or the Manufacturing Automation Protocol (MAP) are base on the token bus approach.
The token bus is of little importance today and has been almost completely replace by Ethernet and real-time phone capable Ethernet variants.
The functional principle of the token in a physical bus structure
As in the Token Ring. The individual stations are Bulk Database logically arrange in a ring structure. However, this is based on a physical bus structure and is completely independent of the spatial position of the station or its connection to a ring line distributor.
