The Internet's backbone is an interconnected series of wide-area networks (WANs). These are large computers linked together over a long distance via phone or wireless communication. These huge WANs link tens of thousands of smaller WANs and local-area networks (LANs, computers linked together in a central location, such as a business or government organization) around the world. In this sense, the Internet IS a network of computers. It just isn't a directly connected network; it's more roundabout, more of a simulation of a network.
When you access the Internet, you can send email to anyon…