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Bus network

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Title: Bus network  
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Subject: Network topology, Local area network, RS-485, Token bus network, Internet topology
Collection: Network Architecture, Network Topology
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Bus network

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]


  • How it works 1
  • Advantages and disadvantages 2
    • Advantages 2.1
    • Disadvantages 2.2
  • See Also 3
  • References 4

How it works

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.[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


  • Easy to connect a computer or peripheral to a linear bus
  • Requires less cable length than a star topology resulting in lower costs
  • It works well for small networks.
  • Easy to Extend


  • 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
  • It is difficult to detect trouble at an individual station.

See Also


  1. ^ "Network Topologies" 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.  

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