Internet of Things (IoT) Practice Exam

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Which technology allows IoT devices to be connected wirelessly?

A. Bluetooth
B. Fiber optics
C. Long-range radio waves
D. USB cables

The correct answer is: A. Bluetooth

Bluetooth is a wireless technology that enables IoT devices to connect and communicate over short distances. It facilitates the exchange of data between devices without the need for physical cables, making it ideal for wearable devices, smart home gadgets, and other portable electronics. Bluetooth operates on radio frequency, allowing for easy pairing and communication between devices without the constraints of wiring. While fiber optics and USB cables are also technologies used for data transmission, they require physical connections and are not suitable for wireless communication. Fiber optics utilizes light to transmit data over longer distances but is not wireless, and USB cables are primarily used for wired connections to provide power or transmit data. Long-range radio waves can support wireless communication over greater distances, but they are generally used in specific applications such as satellite communication or certain types of telemetry, rather than the broad array of contexts in which Bluetooth is used.