As the number of intelligent systems that require direct access expands to the multiple billions, Internet Protocol Version 6 (IPv6) becomes an institutional imperative. However, questions are being raised about security aspects and subtending apparatuses of IPv6. This book provides a practical and accessible primer on this emerging technology. The text discusses general security mechanisms and approaches as well as IPv6 security features. In addition to firewall use, the authors also examine the fundamental topic of IPSec and its use in IPv6 environments. A final chapter addresses security considerations for migration environments that may consist of mixed IPv4 and IPv6 networks.