There were communications networks long before the advent of social networking sites like Facebook and Twitter. In fact, modern computer networks—whether on a website, college campus, or just in your home—stem from technology used to create the first telephone networks, and later, television networks. Readers will appreciate the history behind communications networking while learning how today’s networks connect people. Colorful photographs accompany accessible information about LANs, WiFi, and more, and interesting sidebars further explain the networks we rely on every day.