Question
Which of the following frequencies can be used for amateur radio mesh networks?
Answer Options
- A) HF frequencies where digital communications are permitted
- B) Frequencies shared with various unlicensed wireless data services
- C) Cable TV channels 41-43
- D) The 60-meter band channel centered on 5373 kHz
Correct Answer: B
Explanation
Amateur radio mesh networks (such as AREDN, Amateur Radio Emergency Data Network) are broadband digital systems designed for high-speed data transfer, typically using networking hardware operating in the microwave regions. To achieve this broadband capability, they often leverage frequency allocations that are also used by other types of radio services.
Amateur mesh networks primarily operate on frequencies shared with various unlicensed wireless data services, such as the ISM (Industrial, Scientific, and Medical) bands. These commonly include the amateur segments of the 2.4 GHz and 5.8 GHz bands, where specific channels overlap with frequencies used by Wi-Fi and other unlicensed services, enabling the use of commercial off-the-shelf (COTS) equipment with modified firmware.
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