Written to appeal to a broad audience, 802.1X Port-Based Authentication seeks to define this complex concept in accessible terms and to explore its various applications to today's computer networks using this particular network protocol. This text assumes that the reader may have little or no prior knowledge and only a general understanding of computer networking, presenting an introductory overview as well as a subject overview in each chapter. It provides an in-depth discussion of technology, design, and implementation with a specific focus on Cisco devices. Including examples derived from the 802.1X implementation, this book also addresses troubleshooting issues in a Cisco environment.