Bus network

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Topology of a bus network

A bus network is a network topology in which nodes are directly connected to a common linear (or branched) half-duplex link called a bus.[1][2]


A host on a bus network is called a Station or workstation. In a bus network, every station will receive all network traffic, and the traffic generated by each station has equal transmission priority.[3] A bus network forms a single network segment and collision domain. In order for nodes to transmit on the same bus simultaneously, they use a media access control technology such as carrier sense multiple access (CSMA) or a bus master.

If any link or segment of the bus is severed, all network transmission ceases due to signal bounce caused by the lack of a terminating resistor.

Advantages and disadvantages[edit]


  • Very easy to connect a computer or peripheral to a linear bus.
  • Requires less cable length than a star topology resulting in lower costs
  • The linear architecture is very simple and reliable
  • It works well for small networks
  • It is easy to extend by joining cable with connector or repeater
  • If one node fails, it will not affect the whole network


  • Entire network shuts down if there is a break in the main cable or one of the T connectors break
  • Large amount of packet collisions on the network, which results in high amounts of packet loss
  • Slow with many nodes in the network
  • It is difficult to isolate any faults on the Network

See also[edit]


  1. ^ "Network Topologies" Archived 2015-07-20 at the Wayback Machine Teachbook Blog, Accessed August 4th 2015.
  2. ^ Janssen, Cory "What is a Bus Topology?", Techopedia, Accessed August 4th 2015.
  3. ^ Knott, Geoffrey; Waites, Nick (2002). BTEC Nationals for IT Practitioners. Brancepeth Computer Publications. p. 395. ISBN 0-9538848-2-1. ...all stations have equal priority in using the network to transmit.