Your phone sends data through the air. So does everyone else's. So how does it work?

追加: 2026-05-05

[00:00:00]Your phone sends data as invisible radio waves, but so does every other device. So, how does anything actually work?

[00:00:06]Wi-Fi uses specific frequencies.

[00:00:09]2.4 GHz travels far, but gets congested.

[00:00:12]5 GHz is faster, but shorter range.

[00:00:16]When you connect, your device and router negotiate a shared channel.

[00:00:19]Data gets chopped into packets, each labeled with a destination.

[00:00:23]The router reads the label and forwards it.

[00:00:25]Multiple devices share the frequency using a listen-before-transmit system.

[00:00:29]If two talk at once, both back off and retry randomly.

[00:00:33]Your router is a traffic controller for invisible signals.

[00:00:36]Full breakdown on the channel.