In the following pairs of OSI protocol layer/sub-layer and its functionality, the INCORRECT pair is
(a) One of the main functionality of Network Layer is Routing. So, option (a) is CORRECT.
(b) Bit Synchronization is always handled by Physical Layer of OSI model but not Data Link
So, option (b) is INCORRECT.
(c) End – to – End Process Communication is handled by Transport Layer. So, option (c) is
(d) MAC sub layer have $3$ types of protocols (Random, Controlled and Channelized Access).
So, option B is incorrect pair.
Answer is B) Data Link Layer & Bit Synchronization.
Because, Data Link Layer is associated with Frame Synchronization, and not Bit Synchronization.
1) Yes, Network layer does Rotuing
2) No, Bit synchronization is provided by Physical Layer
3) Yes, Transport layer provides End-to-end process
4) Yes, Medium Access Control sub-layer of Data Link Layer provides
following link is Kvs_Pgt_Question Paper...