Tuesday, January 27, 2015

Bus Topology

In bus topology all device share single communication line or cable. All devices are connected to this shared line. Bus topology may have problem while more than one hosts sending data at the same time. Therefore, generally the bus topology either uses CSMA technology or set one host has Bus Master to solve the issue.
In this failure of a device does not affect the others. But if the shared line gets failed communication between all other devices fail.

Both ends of the shared line has a terminator. The data can be sent in only one direction at a time and as soon as it reaches the extreme end, the terminator removes the data from the line.   

To set up Bus Topology required a set of cables, few connectors and most importantly the terminators.

Cables :- Generally while configuring bus topology, two different grades of cables are used. One thick (as a trunk or backbone/main cable) and other thin (as branch cables that used to connect the devices with the backbone cable).

T-Connectors:- T-Connecters were used to join the branch cables with the trunk and were T in shapes.

Terminators:- Terminators are connected to each end of the trunk. They ground and neutralize all garbage data of the trunk cable that was generated because of the collisions that used to occur in a bus topology.

British Naval Connectors or BNCs:- These connectors are used to connect the branch cables with the PCs. The branch cables were crimped with the BNC connectors and then the connectors were connected to the available ports in the NICs (LAN cards) that were installed in the PCs.


For Other Topologies Click HERE

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