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A 1.3.6 to A 1.3.7 Control Systems and Their Applications (HL only)
A control system measures what is happening, compares it against a target and acts to reduce the difference, a single loop that sits behind a thermostat holding a room at 20°C and behind a self-driving...
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A 1.3.3 Comparing Approaches to Scheduling (SL and HL)
When several processes are ready at once, only one can use the processor, so the operating system has to choose an order, and that choice changes how long users wait and how much time is lost switching...
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A 1.3.1 to A 1.3.2 The Role and Functions of the Operating System
Explore the core role of operating systems (OS) in managing computer resources like memory and processors. Learn how they simplify interaction with hardware, ensuring efficient operation. We'll cover...
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A 1.4.1 Translation
A1.4.1 is an evaluate statement: students judge which translation process suits a given job, not only describe how each one works. The lesson covers interpreters and compilers, along with the two hybrids...
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A 1.2.3 Logic Gates
Logic gates are the components that let a computer act on binary signals rather than only store or move them. Each gate takes one or two binary inputs and produces a single output by one fixed rule. This...
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A 1.2.1 Representing Data
This lesson introduces the number systems used to represent whole numbers: binary and hexadecimal, set against the decimal system students already use. Students describe how each system works by place...
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Welcome: how to use this site
Everything on this site sits in six sections, each with a different job: teaching content, practice activities, assessment guidance, and revision. This page explains what each section holds, why parts...
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A 2.4 Network security
This section covers firewalls, vulnerabilities, countermeasures, and encryption. Firewalls protect networks by inspecting traffic. Common vulnerabilities include DDoS, malware, and SQL injection. Countermeasures...
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A 2.3 Data transmissions
This section covers IP addressing, comparing data transmission media (wired/wireless), and packet switching. It includes IPv4/IPv6, public/private/static/dynamic IPs, NAT, bandwidth, cost, range, and...
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A 2.2 Network architecture
Network architecture encompasses various topologies like star, mesh, and hybrid, each with different strengths and weaknesses. Servers play crucial roles, providing services like DNS, DHCP, and file sharing....