What is the wireless alternative to wired connections that uses radio frequencies?

• A. Bluetooth
• B. Wireless Fidelity (Wi-Fi)
• C. Infrared
• D. Ethernet

Answer: (B)

Wireless networking using radio frequencies to connect devices without cables is Wi‑Fi. It is designed to provide access to local networks and the Internet by communicating with a wireless router or access point over radio bands like 2.4 GHz and 5 GHz (and 6 GHz in newer standards). This lets devices move around and still stay connected without wired cables, which is exactly what a wireless alternative to a wired connection aims for.

Bluetooth also uses radio waves but is meant for short-range, device-to-device connections and personal area networks, not typical LAN access. Infrared uses light and requires line of sight with limited range and speed, so it isn’t used for general networking. Ethernet is the wired standard, relying on copper or fiber cables.