Find out what a network is and how it connects us to each other and the world at large. Discover how networks provide us with the latest entertainment and allow us to check our emails on our phones while on the move. Learn too how they let us stay connected with friends and family thousands of miles away across the Earth. Learn about how a network works and how this high-tech science has changed your world! High-Tech Science is a series of four books that look at the revolutionary, cutting-edge science that we rely on to run our lives and keep our modern world working.