How the internet works, explained way too simply
The one-sentence version
Everything you send gets chopped into tiny numbered parcels, passed hand to hand between computers, and glued back together at the other end.
Video coming soon
The slightly longer version
Everything is chopped up
A photo, a message, this page: to a computer they’re all just a long string of numbers. Sending that whole string in one go would be like posting a sofa. So it gets cut into thousands of small parcels called packets, and each one gets a label: where it’s going, where it came from, and its place in the order.
Passed hand to hand
The internet isn’t one big machine. It’s millions of networks, run by different companies, all agreeing to pass each other’s parcels along. Your packet goes from your phone to your router, to your internet provider, and then hops between computers called routers, each one reading the label and handing it a step closer to where it’s going.
No fixed road
Packets from the same message don’t have to travel together. If one road is busy or broken, routers send the next packet another way. That’s why the internet keeps working when bits of it fail. It was designed to.
Glued back together
At the other end, the packets arrive jumbled and sometimes a few go missing. The receiving computer sorts them by number, asks again for any that didn’t turn up, and rebuilds the original. All of this usually takes a fraction of a second, which is the genuinely astonishing part.
