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GCSE Computer Science · OCR

Performance

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Course

1. Computer Systems

1.1 Systems Architecture

1.1.1 Architecture of the CPU 1.1.2 CPU Performance 1.1.3 Embedded Systems Module Review

1.2 Memory and Storage

1.2.1 Primary Storage (Memory)1.2.2 Secondary Storage 1.2.3 Units 1.2.4 Data Storage 1.2.5 Numbers 1.2.6 Characters 1.2.7 Images 1.2.8 Sound 1.2.9 Compression Module Review

1.3 Computer Networks, Connections and Protocols

1.3.1 Networks and Topologies 1.3.2 Roles of Computers in Network Types 1.3.3 Hardware for Local Area Networks (LANs)1.3.4 The Internet as a Collection of Networks 1.3.5 Star and Mesh Network Topologies 1.3.6 Wired and Wireless Networks, Protocols and Layers Module Review

1.4 Network Security

1.4.1 Threats To Computer Systems and Networks 1.4.2 Identifying and Preventing Vulnerabilities Module Review

1.5 Systems Software

1.5.1 Operating Systems 1.5.2 Utility Software Module Review

2. Computational Thinking, Algorithms and Programming

2.1.1 Computational Thinking 2.1.2 Designing, Creating and Refining Algorithms 2.1.3 Searching and Sorting Algorithms Module Review

Subjects1.2 Memory and Storage1.2.9 Compression

1.2.9 Compression

In this lesson, we will learn about compression and its importance in memory and storage systems. We will delve into the two main types of compression: lossy and lossless.

SummaryRevision

Topic 1

The Need for Compression

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Topic 2

Lossy Compression

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Topic 3

Lossless Compression

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Topic 4

Effects on the File for Each Type of Compression

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Features

Explore how Knowness supports GCSE learning.

Embedded InteractionsFlashcards and exercises appear inside lessons at the moment they matter.Spaced RepetitionDue cards come back at the right time using memory science.Predicted GradesProgress signals build into a clearer view of where a student is heading.BattlesFast competitive revision against another learner or a practice opponent.Deck ManagerOrganise revision cards by subject, lesson, module, and due status.

Schools Parents Pricing