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There are two main types of network:

1. Local Area Network (LAN)
2. Wide Area Network (WAN)

LAN

A LAN covers a small area such as one site or building, eg a school or a college.

WAN

A WAN covers a large geographical area. Most WANs are made from several LANs connected together.

• The internet is a WAN.
• A network of bank cash dispensers is a WAN.
• A school network is usually a LAN.
• LANs are often connected to WANs, for example a school network could be connected to the internet.
• WANs can be connected together using the internet, leased lines or satellite links.