The GATE Grind

GATE 2014 CS (CS3) – Question 33

Computer Networks · Principles of Layering · 1 mark · Multiple choice

Which OSI layer/sub-layer and functionality pair is INCORRECT?

  1. Network layer — routing
  2. Data Link Layer — bit synchronization
  3. Transport layer — end-to-end process communication
  4. Medium Access Control sub-layer — channel sharing

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Correct answer: (B) Data Link Layer — bit synchronization

Explanation

Bit-level timing and synchronization are physical-layer functions. Therefore pairing data link with bit synchronization is incorrect, **B**. Network routing, transport process communication and MACchannel sharing correspond to their stated layers.