A token bus is a type of network which uses the token ring protocol. The protocol is implemented over a virtual ring using coaxial cable. A token is passed around the ring, so that only one computer has the right to transmit data. If the chosen computer doesn't have any data to transmit, the token is passed to the next computer.
In a token bus network architecture, the nodes at either end of the bus do not actually meet. In a token ring, the network logically functions as a ring, but is wired as a star.
You can't get on the bus without a token.
A token bus uses a shared bus for communication. Hosts on the bus are ordered in a logical ring, with access to the bus coordinated by passing a token (a special packet) around the ring, indicating permission to transmit. The intent is to get the robustness of a simple bus protocol with the deterministic response time of a token ring. Unfortunately, because the bus is shared, each host on the bus must wait for the token to be completely transmitted before it can pass it on. This is in contrast to a token ring, where the token passes through each host with only a few bits delay. This gives the token bus considerably worse latency than a token ring. The reliability of a token protocol over a (CSMA protocl such as Ethernet ) is undermined by the complex protocols needed to recover the token at exactly one host should it become corrupted.
$2, this is a standard set price of any bus token/transit slip in bc
bus token bus
Advantages of bus LAN Advantages of bus LAN
less cable
IEEE 802.4 token bus
How does Token Bus (IEEE 802.4) enforce discipline on a logical ring topology? ----
ri
doubleplexer
Usually it's worth one bus ride.