ELI5: how wifi works

// eli5

What is WiFi?

WiFi is like an invisible messenger that sends information through the air using radio waves, just like how radios and cell phones work [1][3]. A device called a router creates these invisible signals that your phone, tablet, or computer can receive [2].

Why does it work?

Your devices have tiny receivers inside them that can pick up these radio wave messages from the router [2]. The router sends out signals at specific radio frequencies, similar to how a walkie-talkie works, and your device listens for them [3][4].

What can stop it?

Things like walls, water, and metal can block or weaken WiFi signals, kind of like how a hill can block a radio station from reaching far away [4]. The farther you are from the router, the weaker the signal becomes [3].

How do you connect?

Your device scans for available WiFi networks and then connects to the router through a special process, similar to how two people agree to talk on the same radio channel [5].