For most humans to understand a concept we must be able to use many different approaches to reach the final "aha" moment that is understanding. The brain works as an interconnected system that links visual cues to auditory, taste, smell, and touch. For a long time scientists thought that the brain worked in  a "top down" fashion, much like a business. Information would go to a central unit and the unit would process and send out orders, much like a boss, or board, if you will. Through advanced technology scientists have now found that connections are everywhere. The connections don't act like a line of information going from one point to another, but a loop. The info may circle around the whole brain making connections that would seem wholly unlikely. In this instance the brain operates much more like the internet than a business.

Imagine trying to explain the internet or the connections in a brain to someone whom has never heard of them. An explanation would not suffice. In the image above we see a large array of connections. For the sake of simplicity and my own knowledge base lets use this graph to represent the "Six Degrees of Kevin Bacon" project. The project basically states that anyone knows someone how knows someone and so on and so forth until six people down the line someone knows Kevin Bacon. It can really be changed to anyone, but you get the point. Enough words, though all the connections in the representation someone knows someone who knows you.  In probing the endless array of connections and loops on the internet I have found some great graphics that have shed light on otherwise hard to visualize concepts.

Here is the internet activity and connections throughout the world.

Web connectivity density

United States internet connections between cities.