How the Internet Works
The Internet is a world-wide but informal network of computers connected by traditional phone lines, by cable, and also wirelessly via satellites and cell phones.Amazingly, it’s not owned by anyone. The giant telecoms might own the phone lines and mobile networks, but they don’t own or control the Net. Neither do Microsoft nor Google.
So, you’re probably thinking, isn’t that a recipe for anarchy?
Fortunately not. To avoid chaos, a set of protocols or conventions has evolved that define how all these millions of computers communicate with each other, much as there are conventions for using networks such as the phone or road system. Read the full article: How the Internet Works