Computer Science for IGCSE & O level - Data Transmission (Section 3 - No. 20)

What is the purpose of a "timeout" in the context of automatic repeat request (ARQ)?

To send the data faster.

To automatically retransmit data if an acknowledgement isn't received.

To encrypt the data.

To reduce the number of errors.

A timeout triggers a retransmission if an acknowledgement is not received within a certain period.