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Difference between Star topology and Bus topology

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  • Difficulty Level : Medium
  • Last Updated : 01 Aug, 2022
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Prerequisite – Types of Network Topology 

1. Star Topology : 
Star topology is used for Local Area networks in which all nodes are connected to a central point called Hub, which connects them to the communication channel. The connections are in such a manner that n number of wires are required to connect n number of end devices or nodes. Traffic is generated from the central hub of the star. The central hub controls communication between all the nodes, message sent by one node reaches the hub first, and then it is transmitted to the receiver node through the hub. 

 

2. Bus Topology : 
Bus topology is a type of network topology in which all the devices are connected to a single cable which is called the backbone of the network. It consists of a terminator at each end of the cable. The network cable is responsible for the communication between the devices and when the data reaches the end of the cable it is removed by the terminator from the data line. It is the easiest network topology when the devices are to be connected linearly. 

 

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 the central hub fails then the whole network fails.In a Bus topology, the failure of the network cable will cause the whole network to fail.
3.In star topology, there is a non-linear arrangement of nodes in a network.In a bus topology, there is a linear arrangement of nodes in a network.
4.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 a terminator’s high amount of traffic as if there is high traffic then the performance of the network is affected.
5.Star topology does not have any terminator.Bus topology has a terminators at both ends of the network.
6.Star topology has a high implementation cost because of the central hub and extra wires required for connection.Bus topology is less expensive than a star topology.
7.Data transmission is faster in a star topology.In a Bus topology, the data is transmitted slower as compared to a star topology.
8.In star topology the communication between nodes is done through a central hub, a message from the sender node reaches the central hub first then it is transmitted to the receiver node.In a Bus topology, the data from a sender device to a receiver device is sent directly.
9.Expansion is easier.Expansion of network i.e. addition of new node is difficult.
10.Fault identification and isolation are relatively easier.Fault identification and isolation are not easier.
11.Chances of data collision are less,Data collisions occur frequently
12.The signal transmission is not unidirectional.The signal transmission is  unidirectional.
13.Less chances of data collision in star topology.High chances of data collision in bus topology.
14.

Examples-

  • Star topology is frequently used in high-speed LANs.
  • Homes and workplaces frequently employ star topologies.

Examples-

  • Ethernet networks 
  • The bus topology can be used for the further incorporate I/O devices like printers, scanners or others in a network at home/workplace.

 

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