Which statement accurately describes the regulatory status of the 2.4 GHz and 5 GHz frequency bands that are commonly used for Wi-Fi networks in the United States?
They are licensed bands reserved exclusively for television broadcasters.
They are restricted to emergency services and public-safety radio systems only.
They are unlicensed bands that consumers may use without obtaining a spectrum license, subject to FCC Part 15 limits.
They are military-only bands that require encrypted transmissions and federal licensing.
Both 2.4 GHz and 5 GHz fall within spectrum segments that the FCC designates for unlicensed use (the ISM and U-NII bands, respectively). Devices may operate there without obtaining an individual license, provided they comply with Part 15 technical limits on power and interference. Other answers describe licensed or restricted services that do not apply to these Wi-Fi bands.
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What does it mean for a frequency band to be unlicensed?
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What are FCC Part 15 limits, and why are they important?
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What are the ISM and U-NII bands, and how are they related to Wi-Fi?