Network: a group of computers that can talk to each other. There is a central computer in one city that communicates with millions of other ones. (like the star formation from mit) If the central computer fails, the whole network fails. The best layout for a network is the spider web. Every computer is connected to every other, back and forth. A global system of interconnectd computer networks that use the standardized. Internet protocol suite (tcp/ip) to serve billions of users worldwide. The ideas behind this protocol were funded by the arpa of the us dod around: thus the internet was originally called the arpanet. Opposite of your home phone where you get a direct line that is only between you and the person you are talking to. The internet tries multiple lines, it doesn"t make sure the line is clear first, it just tries and fails or succeeds at random lines.