Which technology provides short-range communication for devices?

Bluetooth technology is specifically designed to facilitate short-range communication between devices, typically within a range of about 30 feet (approximately 10 meters). This wireless technology allows for the exchange of data between a wide variety of devices such as smartphones, computers, headphones, and other peripherals without the need for physical connections.

Bluetooth operates in the 2.4 GHz band, which is a frequency range shared by many other devices, allowing for effective communication while engaging in low-power consumption. This is particularly beneficial for personal area networks, where devices operate close to each other and can connect seamlessly without the hassle of wires.

In contrast, the other options represent different forms of communication that do not specialize in short-range device connectivity. Ethernet is primarily used for wired connections in local area networks and supports longer, stable connections. Long-range wireless refers to technologies that enable communication over greater distances, such as cellular networks or satellite communications, which are not suitable for the short-range communication scenario. Fiber optic technology provides high-speed data transmission over long distances using light signals, making it unsuitable for short-range device communication as well.