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0478 Unit 2: Data transmission and encryption

Paper 1: Computer systems

2

Inside the Unit...

Download Free Sample 3.6mb

Areas Covered

  • Lesson 1: Data packets
  • Lesson 2: Data transmission
  • Lesson 3: Error detection
  • Download sample lesson above
  • Lesson 4: Encryption
  • Assessment

There are 4 worksheets, 4 homework tasks, and an assessment test, each with answers included in this unit.

Summary - New 2023-2025 Exam Specification

This unit covers the key aspects of data transmission. It starts by considering packets of data and their structure. It then extends to the different methods of data transmission, including serial, parallel, simplex, half and full-duplex. The universal serial bus is considered along with the benefits and drawbacks of the interface. Lesson 3 allows students to understand methods of error detection including parity checks, echo checks and checksums. ISBNs are given as examples of check digit use. The final lesson deals with both asymmetric and symmetric encryption. Students are able to demonstrate their understanding in the unit’s final assessment test.

What's included in the toolkit?

Toolkit

These units have been written to satisfy the specification for the theoretical Section 1 of the Cambridge IGCSE® 0478, 0984 and O Level 2210 Computer Science courses. Each unit contains:

  • PowerPoint slides for each lesson
  • Detailed lesson plans
  • Learning objectives and outcomes
  • Worksheets and homework activities with answers
  • End-of-unit Assessment test with answers
  • Other material and links to online resources

What people say...

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I am pleased to have used so many resources created by PG Online. They are the best companion in the life of a teacher!

J Kulandairaj. Computer Science Teacher, Brimsham Green School

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The key strengths of the materials are in their simplicity - you have the content pupils need to know, simply, attractively presented and then a well designed worksheet to test it. The worksheets look excellent and very effective as a tool to cement the learning.

Dr Bruce Geddes. Head of Curriculum, British School Kuala Lumpur

Relevant Textbooks

Inside the Unit...

  • Download Free Sample 3.6mb

    Areas Covered

    • Lesson 1: Data packets
    • Lesson 2: Data transmission
    • Lesson 3: Error detection
    • Download sample lesson above
    • Lesson 4: Encryption
    • Assessment

    There are 4 worksheets, 4 homework tasks, and an assessment test, each with answers included in this unit.

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