The Second Edition of this well-received book guides the reader through implemetation and deployment of the newest version of the Internet protocol, IPv6. The author explains why IPv4 needs to be replaced, how IPv6 came into being, and how IPv6 actually works. It offers updated and comprehensive coverage of important topics including router and server configuration, security and IPv6, the impact of IPv6 on mobile networks, and evaluating the impact of IPv6-enabled networks globally. This book covers IPv6 at a fundamental level so that it is accessible to network engineers as well as a large audience of "IPv6 curious" readers.