Wi-Fi (wireless fidelity) is a wireless networking technology that uses radio waves to provide high-speed Internet access and allow devices like computers and smartphones to connect to a network. A wireless router sends a radio signal to nearby Wi-Fi-enabled devices, which translate the signal into usable data and send data back to the router to access the internet. Wi-Fi works by implementing the IEEE 802.11 family of standards, which defines the protocols for wireless communications.Â