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Difference between Star Topology and Bus Topology

Star Topology VS. Bus Topology: Know the Differences between Star Topology and Bus Topology

Both of these have a very high significance in the field of communicating networks. However, there is a significant difference between star topology and bus topology. The star topology utilises the switch or central hub for broadcasting data and info to all the devices present in a network. On the other hand, the bus topology utilises just a single cable that connects all the peripheral devices.

In this article, we will look at more significant differences between star topology and bus topology. But before we do that, let us understand more about topology.

What is Topology?

The term, network topology, refers to the way in which all the links and nodes in a network are connected. Here, the actual network topology means the physical medium of signal transmission, while the logical network topology means how the data and info pass through the network present between various devices- regardless of how these devices are connected physically.

What is Star Topology?

The star topology is a computer network type that uses the concept of spoke-hub distribution. The nodes in a star topology are connected to the router or the central hub. In this case, the data travels from the router or the central hub to all of the nodes in the network. Thus, if a star topology has “n” links, then there will be “n” nodes.

Basic features of star topology:

  • Every host in a star topology is connected to the router or central hub. Thus, one central hub would act just like a channel for messaging in the basic form.
  • The transmission lines and the hub & hosts connect to form a graph that is star-shaped. Thus, the data in a star network goes through the hub before they proceed to the final destination.
  • The controlling and managing of all the network functions are done by the hub. It even performs a data flow repeater’s role.
  • This topology reduces the overall impact of a transmission line failure as it connects every host separately to the hub. A host would be able to communicate with others by receiving from and transmitting to the hub.
  • In case a transmission line that connects the hub to the host fails, the host would be isolated from all the rest of the networks. But, keep in mind that the network’s remainder will not be affected.

What is Bus Topology?

The bus topology configuration consists of multiple devices connected in a line after one another. This communication happens in a linear manner- and thus, it is termed as a bus configuration. All the nodes or devices are linked together in a bus topology via a shared link called the bus. Every node in the bus receives the network traffic. The link or common cable can be either twisted pair cable or coaxial cable.

Basic features of bus topology:

  • In a bus network, the host is named station. These stations receive all the traffic networks in a bus, and every traffic in the station has equal priority of transmission.
  • A network segment and a collision domain in the bus network are similar. A node shares a bus using the bus master or a medium access control system like the CSMA (carrier-sense multiple access).
  • Since every data and info gets transferred across the primary/ main cable, there is a limit to the maximum distance to which the main cable can go and the total number of drop lines.
  • Every computer present in a bus topology network communicates independently with one another.
  • A primary wire is present in a bus topology, and a dropline connects all the devices to it. Also, the primary wire is connected to the drop lines by a device called the trap.

A network’s whole bus capability can be shared by all the computers. The flow of data and info from one point to another occurs through a network shared among multiple devices.

Difference between Star Topology and Bus Topology

Let us talk about the differences between star topology and bus topology. To make this topic more understandable and clear, we are comparing both the terms based on their individual characteristics, in the table below.

Parameters Star Topology Bus Topology
Connection of Devices All the devices in the network are connected by a central hub in the star topology. All the devices in this network are connected to a single cable- which acts as the backbone.
Failure of Network The entire network would fail in case the central hub fails in the network. The entire network would fail in case the network cable fails.
Data Transmission The network derives data serially from a given device to another as these devices are coupled. The relevant devices in the periphery receive the data straight from the network’s hub.
Speed of Transmission The speed of data and information transfer is comparatively slower. The speed of data and information transfer is comparatively faster.
Cable Requirement It requires more cables. It does not require any cables.
Expenses It requires a central hub along with some additional cables to establish connectivity. Thus, the cost of implementation is pretty high in this case. It does not include any such shenanigans. Thus, it incurs much lesser expenses.
Fundamental Element The cable constitutes the fundamental element of a star topology. A hub or a switch constitutes the fundamental element of a bus topology.
Structure Orientation It is linear in nature. It is non-linear in nature.
Fault Detection It is comparatively much easier to detect faults in the system. It is comparatively trickier to detect any fault in the system.
Transmission of Signals It does not occur unidirectionally. It occurs unidirectionally.
Network Extension Various devices can be added using this configuration. The network only allows the addition of a limited number of devices.

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