Bus Topology Definition Advantages And Disadvantages

Bus Topology


A computer network is a group of computers that use a set of common communication protocols over digital interconnections for the purpose of sharing resources located on or provided by the network nodes.


Network topology is the arrangement of the elements of a communication network. Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial fieldbusses and computer networks.


A bus network topology is a type of network topology in which nodes are directly connected to a common half-duplex link called a bus. A host on a bus network is called a station. In a bus network, every station will receive all network traffic, and the traffic generated by each station has equal transmission priority.


In a bus topology, all nodes or devices are linked with one transmitter or server computer via a single cable (mostly coaxial cable) called backbone. All nodes are connected to the bus cable by drop lines. A drop line is a connection running between the nodes and the main cable.

Differences between Star Topology and Bus Topology:

S.NO.Star TopologyBus Topology
1.Star topology is a topology in which all devices are connected to a central hub.Bus topology is a topology where each device is connected to a single cable which is known as the backbone.
2.In star topology if central hub fails then whole network fails.In Bus topology the failure of the network cable will cause the whole network to fail .
3.Management of high traffic and performance of the network is highly dependent on the capacity of the central hub.Bus topology can not effectively manage high amount of traffic as if there is high traffic then performance of the network is affected.
4.Star topology does not have any terminator.Bus topology has a terminators at both end of the network.
5.Star topology has high implementation cost because of central hub and extra wires required for connection.Bus topology is less expensive than star topology.
6.Data transmission is faster in star topology.In Bus topology the data is transmitted slower as compared to star topology.
7.In star topology the communication between nodes are done through central hub, message from sender node reaches central hub first then it is transmitted to receiver node.In Bus topology the data from sender device to receiver device is sent directly.


Advantages of Bus Topology

  • Easy to connect a computer or peripheral to a linear bus.
  • Requires less cable length than a star topology.
  • Entire network shuts down if there is a break in the main cable.
  • Difficult to identify the problem if the entire network shuts down.
  • Not meant to be used as a stand-alone solution.


  • Bus topology is not great for large networks.
  • Identification of problem becomes difficult if whole network goes down.
  • Troubleshooting of individual device issues is very hard.
  • Need of terminators are required at both ends of main cable.
  • Additional devices slow network down.

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