What digital protocol is used by APRS?
The correct answer is C: AX.25. What digital protocol is used by APRS is AX.25. APRS uses the AX.25 packet radio protocol. For amateur radio operators, this is important for APRS operation. Understanding this helps when operating APRS.
Exam Tip
APRS protocol = AX.25. Think 'A'PRS = 'A'X.25. APRS uses the AX.25 packet radio protocol. Not PACTOR, not QAM, not AMTOR - just AX.25.
Memory Aid
"APRS protocol = AX.25. Think 'A'PRS = 'A'X.25. APRS uses the AX.25 packet radio protocol. Important for APRS operation."
Real-World Application
APRS (Automatic Packet Reporting System): It uses the AX.25 digital protocol. AX.25 is a packet radio protocol based on X.25. APRS packets are formatted according to AX.25. This is the protocol - AX.25 is used by APRS.
Key Concepts
Why Other Options Are Wrong
Option A (PACTOR): Incorrect. PACTOR isn't used by APRS - APRS uses AX.25. PACTOR isn't the protocol.
Option B (QAM): Incorrect. QAM isn't a packet protocol - APRS uses AX.25 packet protocol. QAM isn't the protocol.
Option D (AMTOR): Incorrect. AMTOR isn't used by APRS - APRS uses AX.25. AMTOR isn't the protocol.
题目解析
The correct answer is C: AX.25. What digital protocol is used by APRS is AX.25. APRS uses the AX.25 packet radio protocol. For amateur radio operators, this is important for APRS operation. Understanding this helps when operating APRS.
考试技巧
APRS protocol = AX.25. Think 'A'PRS = 'A'X.25. APRS uses the AX.25 packet radio protocol. Not PACTOR, not QAM, not AMTOR - just AX.25.
记忆口诀
APRS protocol = AX.25. Think 'A'PRS = 'A'X.25. APRS uses the AX.25 packet radio protocol. Important for APRS operation.
实际应用示例
APRS (Automatic Packet Reporting System): It uses the AX.25 digital protocol. AX.25 is a packet radio protocol based on X.25. APRS packets are formatted according to AX.25. This is the protocol - AX.25 is used by APRS.
错误选项分析
Option A (PACTOR): Incorrect. PACTOR isn't used by APRS - APRS uses AX.25. PACTOR isn't the protocol. Option B (QAM): Incorrect. QAM isn't a packet protocol - APRS uses AX.25 packet protocol. QAM isn't the protocol. Option D (AMTOR): Incorrect. AMTOR isn't used by APRS - APRS uses AX.25. AMTOR isn't the protocol.
知识点
APRS, Digital protocol, AX.25, Packet radio
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.