What technology does Wi-Fi utilize for communication?

Wi-Fi utilizes radio waves for communication. This technology operates in the microwave radio frequency spectrum, typically within the 2.4 GHz and 5 GHz bands, to transmit data wirelessly between devices such as computers, routers, and smartphones. The use of radio waves allows for the establishment of a wireless local area network (WLAN), enabling devices to connect to the internet or communicate with each other without the need for physical cables. This capability of wireless communication is one of the defining features of Wi-Fi technology, allowing for greater flexibility and mobility in device connectivity.

The other options do not apply to Wi-Fi technology; for instance, Bluetooth connectivity is a different form of short-range wireless communication often used for connecting peripherals rather than providing internet access. Fiber optic cables are used for wired connections, delivering data at high speeds over long distances through light signals rather than radio waves. Infrared signals are also a form of communication but are limited to short-range and require a line of sight between devices, which is not practical for the broader applications of Wi-Fi technology.