What is one reason spread spectrum technology is employed in Bluetooth wireless personal area networks?

Spread spectrum technology is utilized in Bluetooth wireless personal area networks primarily to facilitate short-range, personal communications. This technology allows Bluetooth devices to transmit data over a wide range of frequencies, rather than a single frequency. By doing so, it helps to reduce interference from other devices operating in the same frequency bands, which is particularly important in a crowded wireless environment.

The use of spread spectrum also enhances the robustness and reliability of Bluetooth connections, enabling secure and effective communication over short distances, typically up to 100 meters, depending on the Bluetooth version and environmental conditions. This capability aligns well with the intended purpose of Bluetooth technology, which is designed for personal area networking, such as connecting peripherals like headphones, keyboards, and other devices within close proximity.