🌐 Day 3
- What Actually Travels Through the Internet?

Okay, we know that the Internet is made of computers, routers and a lot of cables, but what actually travels through those cables? Bits! 💾 Just tiny zeroes and ones..

Imagine a Platypus wants to send another Platypus a cookie 🍪
The computer doesn't really understand what cookie is, as we do. It turns the information into a huge stream of bits, those bits then have to physically travel from one device to another. And this is where things get cool..

Inside a fiber-optic cable, information is represented using pulses of light.💡In other types of connections, it can be represented using electrical signals or radio waves 📻

So when you send a message, your computer is basically saying: 011000110110111101101111011010110110100101100101..

And somewhere on the other side, another computer receives those signals and turns them back into something meaningful.
Of course, the real process is much more complicated than just sending random 1s and 0s. There are different encoding methods, timing, error handling and many other things involved.
But at the very bottom of our Internet journey, we're dealing with something surprisingly simple: info -> bits -> physical signals -> another computer..

Next, we're going to take those bits and see how they become something much more useful: 📦 packets.
And that's where our little cookie starts getting interesting.. 🍪

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