Computer+networks

Before we look at how the Internet works, it is important to understand the different types of computer network.

A [|Local Area Network] is a network of computers linked together over a small geographical area, for example an office building or school
 * Local Area Network (LAN)**

A [|Wide Area Network] is a network of computers which are linked over a large geographical area, for example a number of universities all linked together
 * Wide Area Network (WAN)**

An [|intranet] is a private network which is used to share information within an organisation. An intranet often runs on a local area network, but it is important to note that an intranet is not the same thing as a local area network. An intranet is often likened to a mini internet because it uses the same functionality as the Internet to display web pages, although typically these web pages are private to the organisation who owns the intranet.
 * An Intranet**

[|Read this article] to better understand the difference between an intranet and the Internet.

Now complete this exercise on computer networks
 * Task 1:**



Higher

 * Internet Hosting**
 * Explain what is meant by Internet hosting, and what a computer needs to be a host.
 * Produce a diagram which shows the relationship and data flow between a client and a host.
 * What is a mirror site, and why is it used?