A LevelComputer ScienceOCR3. Exchanging Data

3. Exchanging Data (OCR A Level Computer Science)

Get ready for your OCR A Level Computer Science exams with our revision resources. Find everything you need to revise this topic, so you can go into your exam confident and prepared. Teachers and examiners write all our resources, and they’re designed specifically for each exam board. We regularly update them to match the latest syllabus, so you’ll only revise the most accurate, up-to-date information. Explore the collection below to get started.

3.1 Compression, Encryption & Hashing

  1. Lossy & Lossless Compression
  2. Run Length Encoding & Dictionary Coding
  3. Symmetric vs Asymmetric Encryption
  4. Hashing

3.2 Databases

  1. Relational Databases
  2. Data Normalisation
  3. Entity Relationship Diagrams
  4. Capturing, Selecting, Managing & Exchanging Data
  5. SQL
  6. Referential Integrity
  7. Transaction Processing

3.3 Networks

  1. Networks
  2. TCP/IP
  3. Domain Name System (DNS)
  4. LAN & WAN
  5. Packet & Circuit Switching
  6. Network Security & Threats
  7. Network Hardware
  8. Client Server & Peer to Peer

3.4 Web Technologies

  1. Search Engine Indexing
  2. PageRank Algorithm
  3. Server Side & Client Side Processing
  4. HTML
  5. CSS
  6. CSS: Styling
  7. JavaScript
  8. Variables & Constants in JavaScript
  9. Outputs in JavaScript
  10. Selection in JavaScript
  11. For Loops in JavaScript
  12. While Loops in JavaScript
  13. Strings in JavaScript
  14. Operators in JavaScript
  15. Nested Statements in JavaScript
  16. Functions & Procedures in JavaScript

3.1 Compression, Encryption & Hashing

  1. Exam Questions

3.2 Databases

  1. Exam Questions

3.3 Networks

  1. Exam Questions

3.4 Web Technologies

  1. Exam Questions
OCR A Level Computer Science Past Papers