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Curricula AS-Level OCR Computer Science3. Exchanging Data

3. Exchanging Data

1

3.1 Compression, Encryption & Hashing

Symmetric & Asymmetric Encryption

Run Length Encoding & Dictionary Coding

Lossy & Lossless Compression

2

3.2 Databases

Capturing, Selecting, Managing & Exchanging Data

Relational Databases

Entity Relationship Diagrams

3

3.3 Networks

Network Security & Threats

Network Hardware

Domain Name System (DNS)

Packet & Circuit Switching

Client Server & Peer to Peer

4

3.4 Web Technologies

Variables & Constants in JavaScript

Selection in JavaScript

While Loops in JavaScript

Operators in JavaScript

Strings in JavaScript

For Loops in JavaScript

Nested Statements in JavaScript

Outputs in JavaScript

Functions & Procedures in JavaScript