Computer Science for IGCSE & O level - Data Transmission (Section 1 - No. 44)
In an ARQ system, what happens if the sender does not receive an acknowledgment (ACK) within a specific time limit?
The sender immediately stops transmitting data.
The sender resends the data.
The receiver sends a negative acknowledgment (NAK).
The receiver discards the data.
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If an ACK is not received within the timeout, it generally implies that the data was not received correctly, so the sender resends the data.