In an ARQ mode, what is meant by a NAK response to a transmitted packet?
The correct answer is A: Request retransmission of the packet. In an ARQ mode, what is meant by a NAK response to a transmitted packet is to request retransmission of the packet. NAK (Negative Acknowledgment) indicates the packet was received with errors and requests retransmission. For amateur radio operators, this is how ARQ error correction works. Understanding this helps when operating ARQ modes.
Exam Tip
ARQ NAK response = request retransmission of packet. Think 'N'AK = 'N'egative 'A'cknowledgment = 'N'eed 'A'nother 'K'opy. NAK indicates packet received with errors and requests retransmission. Not received correctly, not connected, not file complete - just request retransmission.
Memory Aid
"ARQ NAK response = request retransmission of packet. Think 'N'AK = 'N'eed 'A'nother 'K'opy. NAK indicates packet received with errors and requests retransmission. Standard ARQ error correction mechanism."
Real-World Application
ARQ mode: You transmit a packet. The receiving station checks for errors. If errors are detected, it sends NAK (Negative Acknowledgment), requesting retransmission. If no errors, it sends ACK (Acknowledgment). NAK means 'send it again' - request retransmission. This is how ARQ error correction works.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. NAK doesn't mean packet received without error - that would be ACK (Acknowledgment). NAK means error detected.
Option C: Incorrect. NAK doesn't mean receiving station connected and ready - that's a different message. Connection status isn't NAK.
Option D: Incorrect. NAK doesn't mean entire file received correctly - that would be a completion message, not NAK. File completion isn't NAK.
题目解析
The correct answer is A: Request retransmission of the packet. In an ARQ mode, what is meant by a NAK response to a transmitted packet is to request retransmission of the packet. NAK (Negative Acknowledgment) indicates the packet was received with errors and requests retransmission. For amateur radio operators, this is how ARQ error correction works. Understanding this helps when operating ARQ modes.
考试技巧
ARQ NAK response = request retransmission of packet. Think 'N'AK = 'N'egative 'A'cknowledgment = 'N'eed 'A'nother 'K'opy. NAK indicates packet received with errors and requests retransmission. Not received correctly, not connected, not file complete - just request retransmission.
记忆口诀
ARQ NAK response = request retransmission of packet. Think 'N'AK = 'N'eed 'A'nother 'K'opy. NAK indicates packet received with errors and requests retransmission. Standard ARQ error correction mechanism.
实际应用示例
ARQ mode: You transmit a packet. The receiving station checks for errors. If errors are detected, it sends NAK (Negative Acknowledgment), requesting retransmission. If no errors, it sends ACK (Acknowledgment). NAK means 'send it again' - request retransmission. This is how ARQ error correction works.
错误选项分析
Option B: Incorrect. NAK doesn't mean packet received without error - that would be ACK (Acknowledgment). NAK means error detected. Option C: Incorrect. NAK doesn't mean receiving station connected and ready - that's a different message. Connection status isn't NAK. Option D: Incorrect. NAK doesn't mean entire file received correctly - that would be a completion message, not NAK. File completion isn't NAK.
知识点
ARQ mode, NAK response, Request retransmission, Error correction
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.