The Illustrated Network- P1:In this chapter, you will learn about the protocol stack used on the global public Internet and how these protocols have been evolving in today’s world. We’ll review some key basic defi nitions and see the network used to illustrate all of the examples in this book, as well as the packet content, the role that hosts and routers play on the network, and how graphic user and command line interfaces (GUI and CLI, respectively) both are used to interact with devices. | THE ILLUSTRATED NETWORK Walter Goralski THE ILLUSTRATED NETWORK Walter Goralski MORGAN KAUFMANN The Illustrated .