What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?
The correct answer is B: The connection is dropped. The action that results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode is that the connection is dropped. After too many failed retransmission attempts, ARQ systems drop the connection. For amateur radio operators, this is ARQ timeout behavior. Understanding this helps when operating ARQ modes.
Exam Tip
ARQ excessive transmission attempts = connection is dropped. Think 'E'xcessive 'A'ttempts = 'E'nd 'A'RQ connection. After too many failed retransmission attempts, ARQ systems drop the connection. Not checksum overflow, not incorrect routing, not encoding reversion - just connection dropped.
Memory Aid
"ARQ excessive transmission attempts = connection is dropped. Think 'E'xcessive 'A'ttempts = 'E'nd 'A'RQ. After too many failed retransmission attempts, ARQ systems drop the connection. ARQ timeout behavior."
Real-World Application
ARQ mode: Multiple transmission attempts fail (e.g., 10 failed attempts). The ARQ system determines communication isn't working and drops the connection. This prevents endless retry loops. After connection is dropped, you must re-establish the connection. This is ARQ timeout behavior - connection is dropped after excessive failures.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Checksum doesn't overflow - checksums have fixed size, they don't overflow. Checksum overflow isn't the result.
Option C: Incorrect. Packets aren't routed incorrectly - routing is about addressing, not ARQ failures. Incorrect routing isn't the result.
Option D: Incorrect. Encoding doesn't revert to default character set - encoding stays the same, connection is dropped. Encoding reversion isn't the result.
题目解析
The correct answer is B: The connection is dropped. The action that results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode is that the connection is dropped. After too many failed retransmission attempts, ARQ systems drop the connection. For amateur radio operators, this is ARQ timeout behavior. Understanding this helps when operating ARQ modes.
考试技巧
ARQ excessive transmission attempts = connection is dropped. Think 'E'xcessive 'A'ttempts = 'E'nd 'A'RQ connection. After too many failed retransmission attempts, ARQ systems drop the connection. Not checksum overflow, not incorrect routing, not encoding reversion - just connection dropped.
记忆口诀
ARQ excessive transmission attempts = connection is dropped. Think 'E'xcessive 'A'ttempts = 'E'nd 'A'RQ. After too many failed retransmission attempts, ARQ systems drop the connection. ARQ timeout behavior.
实际应用示例
ARQ mode: Multiple transmission attempts fail (e.g., 10 failed attempts). The ARQ system determines communication isn't working and drops the connection. This prevents endless retry loops. After connection is dropped, you must re-establish the connection. This is ARQ timeout behavior - connection is dropped after excessive failures.
错误选项分析
Option A: Incorrect. Checksum doesn't overflow - checksums have fixed size, they don't overflow. Checksum overflow isn't the result. Option C: Incorrect. Packets aren't routed incorrectly - routing is about addressing, not ARQ failures. Incorrect routing isn't the result. Option D: Incorrect. Encoding doesn't revert to default character set - encoding stays the same, connection is dropped. Encoding reversion isn't the result.
知识点
ARQ mode, Excessive transmission attempts, Connection dropped, ARQ timeout
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.