Acknowledgements,sequencing,and flow control are characteristics of which OSI layer?

A.
Layer2

B.
Layer3

C.
Layer4

D.
Layers

E.
Layet6

F.
Layer7

Explanation:
Layer 2 data link layer: This layer implements data sub-frame and deals with flow control. The layer also designates topology and provides hardware addressing;
Layer 3 network layer: This layer creates links between two nodes by addressing, including the routing and data trunking through interconnected network;
Layer 4 transport layer: routine data transmission, connected or non-connected, Includes full-duplex or half-duplex, flow control and error recovery services;