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Introduction
Almost everything we do with technology today — sharing files, printing from a phone, browsing the Internet — depends on devices being connected to one another. This unit introduces the idea of a computer network: what it is, what it needs to function, why it is useful, what it costs us, and how networks are classified by the geographical area they cover. By the end of this unit, you will be able to look at any group of connected devices — in your home, your school, or a cybercafé — and describe what kind of network it is and why.
Learning Outcomes
By the end of this unit, you should be able to:
1. Define a computer network and explain what is required for one to exist.
2. Describe the key characteristics of a computer network.
3. Explain at least three advantages and two disadvantages of computer networks.
4. Distinguish between PAN, LAN, MAN and WAN, giving a real-world example of each.
5. Identify and classify the type of network operating in your own home, school, or community. -
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