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http://fcit.usf.edu/Network/chap5/chap5.htm

A linear bus topology consists of a main run of cable with a terminator at each end (See fig. 1). All nodes (file server, workstations, and peripherals) are connected to the linear cable. Ethernet and LocalTalk networks use a linear bus topology.

Advantages of a Linear Bus Topology
Easy to connect a computer or peripheral to a linear bus.
Requires less cable length than a star topology.
Disadvantages of a Linear Bus Topology
Entire network shuts down if there is a break in the main cable.
Terminators are required at both ends of the backbone cable.
Difficult to identify the problem if the entire network shuts down.
Not meant to be used as a stand-alone solution in a large building.
Star

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Posted by blackmamba

In general term a bus topology uses a single coaxial cable, to which hosts are attached at intervals. The term bus comes from an electrical bus, which is a point from which electrical power can be drawn for multiple connections. Ethernet that uses coaxial cable creates a bus topology.

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Posted by HamidAliKhan

The topology of a network whose components are connected by a busbar.

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Posted by sagitraz

A bus topology uses a single coaxial cable, to which hosts are attached at intervals. The term bus comes from an electrical bus, which is a point from which electrical power can be drawn for multiple connections. Ethernet that uses coaxial cable creates a bus topology.

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Posted by ambrose