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| Bus Topology |
| This topology is currently
more popular than the ring topology, largely due to the influence of Xerox's
Ethernet and the wide acceptance of coaxial cable-oriented transmission
medium. With the bus, network nodes connect to a linear length of cable to which user stations are connected by network interface units know as NICs. Each network interface unit has a unique identifier address for receipt of transmitted messages. There are a variety of ways to arbitrate the use of the bus. They can be classified as either centralized or distributed centralized control schemes, utilizing a master node or dedicated bus controller. Centrally controlled topologies, are not common for LANs . Decentralized bus topology, the control logic is distributed throughout all the nodes connected to the bus. It is the most commonly used method. The reliability of a bus network depends on the topology and the control strategy. |
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