Which statement correctly describes the regulatory status of the 2.4 GHz and 5 GHz frequency bands commonly used for Wi-Fi communication in the United States?
Both bands are unlicensed and can be used without obtaining an individual radio license, provided the equipment meets Part 15 technical limits.
The 2.4 GHz band is unlicensed, but the 5 GHz band is licensed exclusively for weather-radar systems.
Both bands are licensed, requiring every Wi-Fi user to secure a spectrum license from the FCC before operation.
The 2.4 GHz band is reserved for amateur radio operators and requires an FCC Amateur Radio license, while the 5 GHz band is unlicensed.
Both the 2.4 GHz ISM band and the 5 GHz U-NII bands are allocated for unlicensed use under FCC Part 15 rules. Manufacturers must certify that their devices meet the power and emission limits in Part 15, but end users do not need to obtain an individual spectrum license. Licensed spectrum, such as the cellular or broadcast TV bands, requires a formal allocation and authorization to avoid interference with other services, which is not the case for standard Wi-Fi equipment.
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