Which of the following frequencies can be used for amateur radio mesh networks?
HF frequencies where digital communications are permitted
Frequencies shared with various unlicensed wireless data services✓Правильный ответ
Cable TV channels 41-43
The 60-meter band channel centered on 5373 kHz
Объяснение
Amateur mesh networks run on the parts of the 13 and 5 centimeter amateur bands that overlap the unlicensed bands ordinary Wi-Fi hardware was built for, which is why inexpensive commercial radios can be used under amateur rules. An HF channel of a few kilohertz cannot carry a wideband mesh of this kind, cable channels are not radio allocations, and a single 2.8 kHz 60 meter channel is narrower still.