Identify the ONE CORRECT matching between the OSI layers and their corresponding functionalities as shown.
| OSI Layers | Functionalities |
| (a) Network layer | (I) Packet routing |
| (b) Transport layer | (II) Framing and error handling |
| (c) Datalink layer | (III) Host to host communication |
A.
(a)-(I), (b)-(II), (c)-(III)
B.
(a)-(I), (b)-(III), (c)-(II)
C.
(a)-(II), (b)-(I), (c)-(III)
D.
(a)-(III), (b)-(II), (c)-(I)
Solution:
Packet Routing is the responsibility of Network Layer. (a) → I.
Framing and error (bit level) handling is the responsibility of Data Link Layer.
Hence, (c) → II
Host to Host communication (end to end Communication) is the responsibility of Transport Layer (Practically).
Hence, (b) → III
Hence, Option (b) is correct.