Which statement correctly pairs the connection type with its medium?

• A. Ethernet — Radio signals; Wireless — Wired connection
• B. Ethernet — Wired connection; Wireless — Radio signals
• C. Ethernet — Fiber optic; Wireless — Infrared
• D. Ethernet — Coaxial; Wireless — Satellite

Answer: (B)

The main idea here is matching a connection type with the medium it commonly uses. Ethernet is a wired networking technology that sends signals through physical cables, such as copper twisted-pair or fiber. Wireless networks, on the other hand, rely on transmitting data through the air, typically using radio frequency signals.

So the best pairing is Ethernet with a wired connection and Wireless with radio signals. This reflects the typical distinction: Ethernet needs cables, while Wireless communicates via radio waves. The other options mix in media that aren’t the standard for these categories (for example, Ethernet isn’t limited to fiber optic, and wireless isn’t defined only by infrared; radio is the usual medium for wireless).