The bus is the data link in a bus network. The bus can only transmit data in one direction, and if any network segment is severed, all network transmission ceases.
A host on a bus network is called a station or workstation. In a bus network, every station receives all network traffic, and the traffic generated by each station has equal transmission priority. Each network segment is, therefore, a collision domain. In order for nodes to transmit on the same cable simultaneously, they use a media access control technology such as carrier sense multiple access (CSMA) or a bus master.
Advantages and disadvantages
Easy to connect a computer or peripheral to a linear bus
Requires less cable length than a star topology
It works well for small networks.
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
It is slow when more devices are added into the network
If a main cable is damaged then network will fail or be split into two networks
^BTEC Nationals for IT Practitioners. Brancepeth Computer Publications. 2002. p. 395. ISBN0-9538848-2-1. "...all stations have equal priority in using the network to transmit."