Which of the following cannot be transmitted over an amateur radio mesh network?
The correct answer is C: Messages encoded to obscure their meaning. Which of the following cannot be transmitted over an amateur radio mesh network is messages encoded to obscure their meaning. Encrypted or encoded messages that obscure meaning cannot be transmitted. For amateur radio operators, this is important for mesh network operation. Understanding this helps ensure legal mesh network operation.
Exam Tip
Cannot transmit on mesh network = messages encoded to obscure their meaning. Think 'M'esh 'N'etwork = 'M'essages 'N'ot encoded. Encrypted or encoded messages that obscure meaning cannot be transmitted. Not third party traffic, not email - just encoded messages.
Memory Aid
"Cannot transmit on mesh network = messages encoded to obscure their meaning. Think 'M'esh 'N'etwork = 'N'o encoding. Encrypted or encoded messages that obscure meaning cannot be transmitted. Important mesh network restriction."
Real-World Application
An amateur radio mesh network: You can transmit third party traffic and email over the mesh network. However, you cannot transmit messages encoded to obscure their meaning (encrypted messages). All amateur communications must be in the clear (except space telecommand). This is the restriction - encoded messages cannot be transmitted on mesh networks.
FCC Part 97.113Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Third party traffic can be transmitted - third party traffic is allowed on mesh networks. Third party traffic isn't prohibited.
Option B: Incorrect. Email can be transmitted - email is allowed on mesh networks. Email isn't prohibited.
Option D: Incorrect. Since A and B are not prohibited, 'all of the above' cannot be correct. Only encoded messages are prohibited.
题目解析
The correct answer is C: Messages encoded to obscure their meaning. Which of the following cannot be transmitted over an amateur radio mesh network is messages encoded to obscure their meaning. Encrypted or encoded messages that obscure meaning cannot be transmitted. For amateur radio operators, this is important for mesh network operation. Understanding this helps ensure legal mesh network operation.
考试技巧
Cannot transmit on mesh network = messages encoded to obscure their meaning. Think 'M'esh 'N'etwork = 'M'essages 'N'ot encoded. Encrypted or encoded messages that obscure meaning cannot be transmitted. Not third party traffic, not email - just encoded messages.
记忆口诀
Cannot transmit on mesh network = messages encoded to obscure their meaning. Think 'M'esh 'N'etwork = 'N'o encoding. Encrypted or encoded messages that obscure meaning cannot be transmitted. Important mesh network restriction.
实际应用示例
An amateur radio mesh network: You can transmit third party traffic and email over the mesh network. However, you cannot transmit messages encoded to obscure their meaning (encrypted messages). All amateur communications must be in the clear (except space telecommand). This is the restriction - encoded messages cannot be transmitted on mesh networks.
错误选项分析
Option A: Incorrect. Third party traffic can be transmitted - third party traffic is allowed on mesh networks. Third party traffic isn't prohibited. Option B: Incorrect. Email can be transmitted - email is allowed on mesh networks. Email isn't prohibited. Option D: Incorrect. Since A and B are not prohibited, 'all of the above' cannot be correct. Only encoded messages are prohibited.
知识点
Amateur radio mesh network, Messages encoded to obscure meaning, Encryption, Mesh network restrictions
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.