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0478 Unit 2: Data transmission and encryption

Paper 1: Computer systems

2

Inside the Unit...

Download Free Sample 4.4mb

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...

“
”

I really like the resources, indepth and easy to use. 

Leslie Mohally. Head of ICT and Computer Science, Swans International Sierra Blanca

“
”

Can I just say how pleased I was with the book. I’m thinking of using it rather than a text book! Brilliant in that there is no waffle and just facts – excellent for when a pupil misses a lesson.

 

Jonathan Morton. Head of Computer Science, Cheltenham College

Relevant Textbooks

Inside the Unit...

  • Download Free Sample 4.4mb

    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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