How do APRS stations relay data?
The correct answer is D: By packet digipeaters. How do APRS stations relay data is by packet digipeaters. APRS uses digipeaters to relay packets. For amateur radio operators, this is important for APRS operation. Understanding this helps when operating APRS.
Exam Tip
APRS data relaying = by packet digipeaters. Think 'A'PRS 'R'elay = 'A'utomatic 'P'acket 'R'elay 'S'tations (digipeaters). APRS uses digipeaters to relay packets. Not ACK/NAK, not C4FM, not DMR - just packet digipeaters.
Memory Aid
"APRS data relaying = by packet digipeaters. Think 'A'PRS 'R'elay = 'D'igipeaters. APRS uses digipeaters to relay packets. Important for APRS operation."
Real-World Application
APRS stations relay data: They use packet digipeaters. A digipeater receives an APRS packet and retransmits it, allowing the packet to reach stations beyond the original transmitter's range. This is how APRS relays data - by packet digipeaters.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Packet ACK/NAK relay isn't how APRS relays - APRS uses digipeaters, not ACK/NAK. ACK/NAK isn't used.
Option B: Incorrect. C4FM repeaters aren't used for APRS - APRS uses packet digipeaters. C4FM repeaters isn't used.
Option C: Incorrect. DMR repeaters aren't used for APRS - APRS uses packet digipeaters. DMR repeaters isn't used.
题目解析
The correct answer is D: By packet digipeaters. How do APRS stations relay data is by packet digipeaters. APRS uses digipeaters to relay packets. For amateur radio operators, this is important for APRS operation. Understanding this helps when operating APRS.
考试技巧
APRS data relaying = by packet digipeaters. Think 'A'PRS 'R'elay = 'A'utomatic 'P'acket 'R'elay 'S'tations (digipeaters). APRS uses digipeaters to relay packets. Not ACK/NAK, not C4FM, not DMR - just packet digipeaters.
记忆口诀
APRS data relaying = by packet digipeaters. Think 'A'PRS 'R'elay = 'D'igipeaters. APRS uses digipeaters to relay packets. Important for APRS operation.
实际应用示例
APRS stations relay data: They use packet digipeaters. A digipeater receives an APRS packet and retransmits it, allowing the packet to reach stations beyond the original transmitter's range. This is how APRS relays data - by packet digipeaters.
错误选项分析
Option A: Incorrect. Packet ACK/NAK relay isn't how APRS relays - APRS uses digipeaters, not ACK/NAK. ACK/NAK isn't used. Option B: Incorrect. C4FM repeaters aren't used for APRS - APRS uses packet digipeaters. C4FM repeaters isn't used. Option C: Incorrect. DMR repeaters aren't used for APRS - APRS uses packet digipeaters. DMR repeaters isn't used.
知识点
APRS stations, Relay data, Packet digipeaters, APRS relaying
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.