Pre-University Paper from the year 2009 in the subject Didactics for the subject English - Applied Geography, grade: 13 Punkte, Gymnasium Königsbrunn (-), language: English, abstract: "When I took office, only high energy physicists had ever heard of what is called the Worldwide Web... Now even my cat has its own page." This quotation by Bill Clinton from 1996 describes exactly the evolution of the Internet. Only a few years ago, hardly no one of us had any idea what the Internet really was, what it would be good for, or how we might use it. Today most of us could not even live without it just for one day. We permanently use the Internet for so many purposes. News, entertainment, communication, file sharing, shopping, education and many more things like these. Nowadays the Internet is also a basic element for various sectors which totally depend on it, such as telecommunication, the economy or infrastructure. But how does this highly complicated system actually work? And how is it possible that each web site can be reached any time by everyone worldwide?