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
- The network id not dependent on a central computer
- Each computer has the same access rights so no one can hog the computer
- 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
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.
- Cost effective - small amount of cabling needed
- Easy to install
- Easy to add extra devices to the network
- 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
The Star Topology
Uses a central connection point (hub, switch or a router) to connect all the devices in the network together.
- 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
- Higher cost - large amount of cabling
- Dependant on central hub - if this central connection point fails then the whole network will fail