Exam 1: Independence Scenario
A laptop switches from a Wired (Ethernet) to a Wireless (Wi-Fi) connection. Why does the Web Browser continue to function without any changes?
Layer Independence
Changing one layer (Physical Media) does not affect the others (Application software).
Exam 2: The Concept Trap
Explain one benefit of using layers in networking. [2 Marks]
⚠️ The Trap
"It makes the connection much faster by splitting up the work."
✅ The Mark Scheme
1. Layers are independent of one another.
2. One layer can be updated/changed without affecting others.
Exam 3: Interoperability Lab
How do standard layers help different manufacturers?
Interoperability
Standards ensure that devices from any brand can communicate because they all follow the same layer rules.
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