Which description correctly describes a wireless connection?

• A. A wired connection
• B. Radio signals
• C. Fiber optic connection
• D. Infrared

Answer: (B)

Wireless connections transmit data without cables by using signals that travel through the air. The typical way this is described in networking is radio signals, which carry data via radio waves and enable technologies like Wi‑Fi and Bluetooth. That makes radio signals the best description for a wireless connection. A wired connection relies on physical cables. A fiber optic connection uses light inside a cable, so it isn’t wireless. Infrared is also wireless and uses light, but it’s usually short-range and line-of-sight, so it isn’t the most general description for wireless networking.