1. Introduction

When computers are connected together to form a network they are not connected in any old random pattern. Instead, they are usually connected into one of a number of recognised layouts (topologies).

There are quite a few different layouts but for the purposes of GCSE we will focus on just three, namely the:

• Bus network topology
• Ring network topology
• Star network topology

Each of these different topologies has advantages and disadvantages and when making a decision the person setting up the network will choose the most appropriate layout based on what best suits their needs at that time.