Computer Science for IGCSE & O level - Data Transmission (Section 14 - No. 38)

Which of the following statements is most accurate regarding the use of ARQ?

ARQ always improves data transmission speed.

ARQ is used solely for data compression.

ARQ is a mechanism for ensuring data reliability.

ARQ is only effective in symmetric encryption systems.

ARQ is designed to ensure that data is received correctly by re-transmitting data packets that are lost or corrupted during transmission.