Layers: Why protocols are split into layers, and the benefits. A complete, ready-to-teach 90-minute lesson for OCR GCSE (9–1) Computer Science J277, spec 1.3.2, Paper 1 (J277/01). Download it and teach it, no preparation needed.
WHAT’S INCLUDED
• PowerPoint (87 slides) with step-by-step animated worked examples and click-to-reveal answers
• Worksheet with three levels: Bronze (grades 2–4), Silver (4–6) and Gold (6–9)
• Exit tickets with a confidence scale
• Teacher answers with full working
LESSON FLOW
• Recall (6 questions) and starter (4 questions), timed
• Objectives, key words and a key facts slide
• Part A: What is a layer? · Part B: Benefits of layers · Part C: Protocols in layers
• Each part: method, I do, We do, You do (6 mini-whiteboard questions; the score picks the worksheet level), timed worksheet task, answers
• 4 original exam-style questions (7 marks) with a mark-by-mark walkthrough
• Exit ticket
LEARNING OBJECTIVES
• To know: What a layer is, and that network protocols are organised into layers
• To understand: How data passes down the layers on one device and up them on another
• To be able to: Explain the benefits of using layers, applied to a scenario
WHY TEACHERS LIKE IT
• Visual first: every worked example builds one click at a time
• Teacher notes on every slide: timings, what to say, and the mistakes examiners report
• Every answer checked: calculations, traces and code are worked out by running them
• Exam-style questions written to match J277 command words and mark tariffs
Key words: layer, TCP/IP model, self-contained, interoperability.
Part of Unit 3: Networks, connections and protocols. Also available in the Unit 3 bundle and the full course bundle.
Original resource by Mo² (Mo Squared Resources). Not endorsed by OCR.
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