Which statement describes powerline networking technology?

• A. New "smart" electrical cabling is used to extend an existing home LAN.
• B. A home LAN is installed without the use of physical cabling.
• C. A device connects to an existing home LAN using an adapter and an existing electrical outlet.
• D. Wireless access points use powerline adapters to distribute data through the home LAN.

Answer: (C)

Powerline networking uses the building’s electrical wiring as the data path. You plug an adapter into a wall outlet near the router and connect it to the router with Ethernet, then plug another adapter into an outlet near the device and connect the device with Ethernet. The data is carried over the electrical lines, letting that device join the LAN without running new Ethernet cables through the home.

This describes the core idea: extending the LAN by using an adapter and an existing electrical outlet. It’s not about replacing with new cabling, and while some setups can include wireless features, the fundamental concept is about using the existing power lines to transport network traffic.