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We’re refreshing the questions on our KS3 and GCSE Computer Science subject knowledge assessment. The current version remains available. Updated questions will be available from 18 May 2026.

GCSE

Lesson 1 What is a computer network?

Curriculum > KS4 > Unit > Lesson

This lesson introduces learners to the term ‘computer network’. They develop their understanding by looking at other networks in the real world before discovering what a computer network is. They then discuss the advantages and disadvantages of a computer network before learning about the peer-to-peer model through an unplugged activity. Finally, learners are given real-world examples of peer-to-peer networks before completing a keyword matching exercise.

Learning objectives

  • Define a computer network
  • Discuss the advantages and disadvantages of computer networks
  • Describe the role of a computer in a peer-to-peer network

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