Leonard Kleinrock was the person who came up with the idea of using packets in the internet instead of circuits. This means it was his idea to break up messages into smaller parts, each with a clearly defined beginning and end. Each of these packets of information is sent separately and the original method is reconstructed by the receiving computer. The packets can travel using different paths, and if one packet is not received correctly, the entire message isn’t lost. This is part of what makes the internet so flexible and reliable. Circuits, on the other hand, are inflexible and unreliable. All it takes is one break for the system to fall to pieces. One very important part of the internet is the speed: computers must be in sync for them to