Network Topologies

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  • Created by: Olivia
  • Created on: 29-04-14 11:41

The Ring Topology

All the computers are arranged in a circle

Data sent by one computer passes around the ring until it reaches the correct computer

Advantages

  • The network id not dependent on a central computer
  • Each computer has the same access rights so no one can hog the computer 

Disadvantages

  • If there is a break in a cable, the whole system fails
  • Faults are difficult to locate
  • Its impossible to keep the network running whilst new equipment is added
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The Bus Topology

All the device are connected to the network on a common shared cable (backbone).

Signals are passed in either direction on the backbone.

Advantages

  • Cost effective - small amount of cabling needed
  • Easy to install
  • Easy to add extra devices to the network

Disadvantages

  • Performance is degraded if there is more than 12 devices in a network
  • If there is a break in the backbone the network will not work
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The Star Topology

Uses a central connection point (hub, switch or a router) to connect all the devices in the network together.

Advantages

  • Fault tolerant - if one cable fails all the others will still work and the network will not stop working
  • Load tolerant - extra computers can be added without much loss in performance
  • Easy to add extra computers

Disadvantages

  • Higher cost - large amount of cabling
  • Dependant on central hub - if this central connection point fails then the whole network will fail
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