What is wifi?
wifi (a play on “Hi-Fi”) is a local area wireless technology that lets devices network with each other over radio frequencies. Those frequencies are the 2.4 Ghz UHF band and the 5 Ghz SHF band.
How does wifi work?
A wifi network is broadcast by a wifi router, which allows multiple devices to connect to a wireless local area network (WLAN) at once. The router subsequently connects each of those devices to the internet. Most wifi networks are password-protected.
The distance and strength of a wifi signal depends on the environment and the router, but a single home router can generally cover an entire household.