Which technology enables wireless connectivity by using radio frequency waves instead of physical wires?

• A. Virtual Private Network
• B. Wide Area Network
• C. WiFi
• D. Local Area Network

Answer: (C)

Wireless connectivity using radio frequency waves is achieved by WiFi. WiFi is a wireless networking technology that lets devices connect to a local network and the internet without cables by communicating with wireless access points over RF bands such as 2.4 GHz and 5 GHz. VPN is about securing data over a network and isn’t a method of wireless connection. A wide area network describes large-scale networks and can use various transport media, not specifically wireless RF. A local area network can be wired (Ethernet) or wireless, but the term itself doesn’t inherently denote wireless RF communication. So the technology that fits best is WiFi.