In positive acknowledgment, what action does the sender take regarding data packets?

In positive acknowledgment, what action does the sender take regarding data packets?

• A. Immediately re-sends any packet without checking
• B. Sends a separate acknowledgment for each packet
• C. Logs only failed transmissions
• D. Keeps a record of each data packet sent and expects an acknowledgment

Answer: (D)

In positive acknowledgment, the sender keeps a record of each data packet sent and expects an acknowledgment for that packet before moving on. This creates a reliable flow: the sender only confirms delivery after receiving the positive signal, and it can retransmit any packet that isn’t acknowledged in time. The described behavior exactly matches keeping track of every packet sent and waiting for its acknowledgment. Resending immediately without checking bypasses this mechanism, so it doesn’t fit. The acknowledgment is generated by the receiver, not the sender, so sending separate acknowledgments for each packet is not what the sender does. Logging only failed transmissions would miss tracking all outstanding packets that still need acknowledgment.

In positive acknowledgment, the sender keeps a record of each data packet sent and expects an acknowledgment for that packet before moving on. This creates a reliable flow: the sender only confirms delivery after receiving the positive signal, and it can retransmit any packet that isn’t acknowledged in time. The described behavior exactly matches keeping track of every packet sent and waiting for its acknowledgment. Resending immediately without checking bypasses this mechanism, so it doesn’t fit. The acknowledgment is generated by the receiver, not the sender, so sending separate acknowledgments for each packet is not what the sender does. Logging only failed transmissions would miss tracking all outstanding packets that still need acknowledgment.