This topic should relate to learners as they should be familiar with networks and their use of the internet, for example, their centre's networks and networks in their homes and handheld devices. This experience should be used as a basis to study this section. It will give them a deeper understanding of networks than they would be expected to have just from normal use.
Many network devices are multi-purpose, such as a modem, hub, router etc. Learners will understand the fundamental role of each of the device types and recognise the different functions within the one device.