ELI5: Explain Like I'm 5

Dot-decimal notation

Imagine you want to tell your friend where to find a tree in the park. You can't use normal words like "the tree by the pond," because your friend needs more specific instructions. So, you use a special code that uses numbers and dots to describe the location of the tree.

This code is called dot-decimal notation. It's like a secret language that computers use to talk to each other.

The code is made up of four numbers, each separated by a dot. Each number goes from 0 to 255. That's a big range of numbers! It's like having 255 candies in a jar, and picking out just one to give to your friend.

For example, the code 192.168.0.1 might describe the location of a computer on a network. The first number, 192, tells you which network the computer is on. The second number, 168, tells you which subgroup the computer is in. The third number, 0, tells you which particular computer it is. And the fourth number, 1, is like the apartment number or room number of the computer.

So, dot-decimal notation is just a way for computers to talk to each other and describe where things are located. It's like having a secret code that only computers understand!
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