Internet of Things (IoT) Practice Exam

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Bluetooth operates using low power radio waves in which frequency range?

2.4 - 2.485Hz
2.4 - 2.485GHz
2.4 - 2.485MHz
1.2 - 1.25GHz

The correct answer is: 2.4 - 2.485GHz

Bluetooth operates using low power radio waves in the frequency range of 2.4 to 2.485 GHz. This specific frequency range is part of the ISM (Industrial, Scientific, and Medical) band, which is designated for unlicensed use. This allows Bluetooth devices to communicate wirelessly without the need for a specific license, making it accessible for a variety of applications in consumer electronics. Using this frequency range enables Bluetooth to achieve a balance between range and power consumption, facilitating reliable connections for devices like smartphones, headphones, and wearable technology. The higher frequency also allows for higher data rates when transferring information, which is crucial for the performance of modern Bluetooth applications. The other frequency ranges listed in the options do not correspond to Bluetooth's operational parameters. For instance, the terms 'Hz' and 'MHz' indicate vastly different scales of frequency that are not applicable here. Therefore, choosing the correct frequency range is essential for understanding how Bluetooth technology functions effectively within the IoT landscape.