Network Topologies 1

Network Topologies 1

Network Topologies

Bus Topology

  • In a bus topology, all devices are linked along a single cable, also known as the backbone.
  • The main advantage of this set up is that it is easy to set up and extend.
  • Signals are broadcast in both directions to the entire network from any one node.
  • A disadvantage is that if there’s a fault in the backbone cable, all connected devices are affected.
  • It can also lead to data collisions when two devices send signals at the same time.
  • The length of a bus network is limited by cable length and the number of stations.
  • It also suffers from heavier network traffic which can slow down data transmission speed.

Ring Topology

  • A ring topology forms a circular network where each device (node) is connected to two others, forming a loop.
  • Data flow in a ring topology is in one direction, reducing the chance of data collisions.
  • It is relatively simpler to install and reconfigure, adding or removing devices causes minimal disruption.
  • A disadvantage is that a single failure can impact the entire network.
  • It can be difficult to troubleshoot a ring network, contributing to network downtime.
  • Every packet of data must pass through all computers between source and destination, making it slower compared to a star network.

Star Topology

  • In a star topology, all devices are connected to a central hub or switch.
  • The central hub acts as a repeater, it receives and transmits data to the appropriate node.
  • If one node fails, it doesn’t affect the rest of the network, offering a high level of fault tolerance.
  • It is easy to add or remove devices and provides for easy fault identification and isolation.
  • A disadvantage is that if the central hub fails, the whole network goes down.
  • Star topology also requires more cable length than a linear topology and can be expensive to set up due to the cost of the hubs or switches.