1.2 Text, Sound and Image Representation
Text, Audio and Visual Media Encoding Understanding how analog data is captured, digitized, and represented in computer systems. Character Sets:…
View Item →Grade: Cambridge O Level (2210)
1.3 Data Storage & Compression Methods
Lossy vs. Lossless Compression Techniques used to reduce file sizes to save storage space and accelerate network transmission speed. Lossy…
View Item →2.1 Types & Methods of Data Transmission
Direction & Synchronization of Data Bits Data transmission principles across physical and wireless media. Transmission Modes: Simplex (one-way only, e.g.…
View Item →2.2 Methods of Error Detection (Parity & ARQ)
Error Checking and Automatic Retransmission During data transmission, electrical noise and interference can invert or corrupt bits. Systems use error…
View Item →2.3 Symmetric and Asymmetric Encryption
Data Confidentiality and Cryptography Transforming plaintext into unreadable ciphertext to prevent eavesdropping and data interception. Symmetric Encryption: Uses a single…
View Item →3.1 Computer Architecture & Fetch-Decode-Execute Cycle
Von Neumann Architecture and Processor Registers The fundamental model of modern digital computers where programs and data reside together in…
View Item →3.2 Input and Output Devices (Sensors & Actuators)
Hardware Peripherals, Sensors, and Actuators Input devices capture physical world data and convert it into digital form. Output devices display…
View Item →3.3 Primary and Secondary Data Storage
Memory Hierarchy and Storage Media Categorization of computer memory based on volatility, access speed, and capacity. Primary Storage: RAM (Random…
View Item →3.4 Network Hardware & Topologies
Network Interface Cards, Routers & Addresses Devices that enable computer systems to communicate over local (LAN) and wide area networks…
View Item →5.1 The Internet and the World Wide Web
Internet Infrastructure, URLs and Web Protocols The distinction between the global interconnected network infrastructure (The Internet) and the hypermedia service…
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