Which of the following is true about Wi-Fi connections?

Wi-Fi connections function by transmitting Internet signals through radio waves. This is foundational to how wireless networking operates, allowing multiple devices to connect to a network without the need for physical cables. The use of radio frequencies allows Wi-Fi to cover various distances and penetrate obstacles like walls, making it a versatile option for providing internet access in homes, offices, and public spaces.

The other options do not accurately represent how Wi-Fi technology works. Fiber optics refer to a different technology that uses light signals for high-speed data transmission through glass or plastic fibers, which is not related to Wi-Fi. Additionally, Wi-Fi networks can support multiple devices simultaneously, contrary to the assertion that only one device can connect at a time. Lastly, Wi-Fi is designed specifically for wireless connections, so it does not provide a direct wired connection, which is another key characteristic that distinguishes it from wired networking technologies.