how the internet works

What i learned about the kahn Academy was that viruses can come in many ways, but usually it comes from humans making accidents, it's also because when your computer pops up an ad saying to sign into your gmail and you sign in hackers could automatically hack everything. If your computer were to get a virus it's possible for other laptops or computers to get it also it’s just like a cold when people get sick. Have you ever wonder like how does my phone send messages and use internet without cords like other phones well that's call radio, in phones we don't use cords but we do use radio waves that send messages and phone calls either in satellite or in big towers which is  complicated if you're not next to one you might lose signal. If you are sending  a picture to a friend there are little bits that make up a picture, the numbers that they use are 0 and 1.