Part V covers three categories of WANs. Chapter 14 describes a type of WAN that is best suited for use between two business sites. Chapter 15 covers Frame Relay, which is useful for connecting more than two business sites. Finally, Chapter 16 discusses a couple of WAN technologies that let you connect to the Internet from your home.
Chapter 14: Leasing a (Network) Roadway Between Two Points
Chapter 15: Leasing a (Network) Roadway Between Lots of Places
Chapter 16: Driving from Home onto the Globally Interconnected (Internet) Roadway