GATE CS 2025 Set 1 | Question 16

MCQ · 1 mark · −0.33

Identify the ONE CORRECT matching between the OSI layers and their corresponding functionalities as shown.

OSI LayersFunctionalities
(a) Network layer(I) Packet routing
(b) Transport layer(II) Framing and error handling
(c) Datalink layer(III) Host to host communication
  1. Option A: (a)-(I), (b)-(II), (c)-(III)
  2. Option B: (a)-(I), (b)-(III), (c)-(II) (correct)
  3. Option C: (a)-(II), (b)-(I), (c)-(III)
  4. Option D: (a)-(III), (b)-(II), (c)-(I)

Answer

(B)

Explanation

The network layer decides the path a packet takes from network to network, so (a)-(I) Packet routing. The transport layer works end to end, carrying data between the source and destination hosts, so (b)-(III) Host to host communication. The data link layer packs bits into frames and detects and handles errors on each single link, so (c)-(II) Framing and error handling.

Answer: B