In Bus network topology, devices share a common backbone cable to send and receive data. A coaxial cable is used to connect all devices. Bus Network Topology always uses a daisy chain scheme to add more devices in a network. In this scheme, one device is connected to another, another to next. The First & last terminating point connects the 50-ohm terminator resistor.


In Bus network topology, the main server is connected at one end of the backbone cable and the other device is connected to different positions along the backbone cable known as Trunk. At both end of Bus Network Topology is connected to terminator which helps to terminate the unused data signal. It is very useful in destroying unsent data from the cable if the destination is faulty. In this Bus Network Topology sends data to all the devices which is connected to the dedicated lines. For example, If PC-1 Sends data to PC-4 , then the data which is sent from PC-1 is sent to all the PC which connected with the backbone cable or dedicated lines. When messages arrive at each device, it checks the destination address, encoded in the message. If the address matches arrive the data. If the address is not matched, the device ignores the data. Due to this a number of devices waiting to send data on the bus are more. This result is slowing down the performance of a network. The basic structure of the bus networktopology is shown :

In Bus Network Topology, the devices are not responsible for data transmission from one device to another. They can only listen to information sent on a network. If one device fails, it doesn’t affect the entire network. In an active topology, devices regenerate signals and take part in the transfer of data: Hence, if one device fails then the entire network is affected.
Every Device on a network shares a common cable. When two machines transmitted data at the same time the signals collide. Due to this, the information is destroyed. The process is called a collision.A collision can affect the performance of the network.


Bus NetworkTopology, is also called as a liner bus. It is the simplest and common method of computer networking. However, Bus Network best with a limited number of devices.
Advantage of Bus Network Topology:

  • Easy to connect the devices to linear buses.
  • Requires Less cable & cost efficiency.
  • Less Expensive than other topology.
  • Work better for the smaller network.

The disadvantage of Bus Network Topology:

  • The entire network gets affected if there is a break in the main cable
  • Terminators are required at both ends of the backbone cable.
  • You face Difficulty to detect the faulty devices.
  • A limited number of devices can be attached.
  • Heavy traffic and the addition of devices degrades the performance.
  • Expensive than single node topology.


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