Computer Science for IGCSE & O level - Data Transmission (Section 4 - No. 41)
Which of the following is a form of error detection that makes use of a system of acknowledgements and timeouts?
Automatic repeat request
More check
Parity bit
Cyclic redundancy check
Forklaring
Automatic Repeat Request (ARQ) is a method of checking detected errors, in which some form of acknowledgments and timeout is automatically re-sending of data if the data is received before (positive acknowledgment) or is timed out.