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A network designer wrote: "All layers in a layered model can directly access the physical hardware." What is wrong with this statement?

medium📝 Analysis Q14 of 15
Computer Networks - OSI and TCP/IP Models
A network designer wrote: "All layers in a layered model can directly access the physical hardware." What is wrong with this statement?
AOnly the lowest layer directly accesses hardware
BLayers do not exist in network models
CAll layers access hardware simultaneously
DHardware access is not needed in networks
Step-by-Step Solution
Solution:

  1. Step 1: Understand hardware access in layered models

    Only the lowest layer (physical layer) directly interacts with hardware.

  2. Step 2: Identify the error in the statement

    Claiming all layers access hardware is incorrect because upper layers work with data, not hardware.

  3. Final Answer:

    Only the lowest layer directly accesses hardware -> Option A

  4. Quick Check:

    Hardware access = lowest layer only [OK]
Quick Trick: Remember: hardware is lowest layer's job only [OK]
Common Mistakes:
MISTAKES
  • Thinking all layers access hardware
  • Denying the existence of layers
  • Believing hardware access is unnecessary

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