Flow and Error control

Flow and Error control

The most important responsibilities of the data link layer are flow control and error control. Collectively, these functions are known as data link control.

1. Flow Control

Flow control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.

2. Error Control

Error control is both error detection and error correction. It allows the receiver to inform the sender of any frames lost or damaged in transmission and coordinates the retransmission of those frames by the sender.