This book is a straightforward discussion of the concepts, principles, and processes of Internet Protocol version 6 (IPv6) and how it is supported by the Microsoft Windows Server 2008 and Windows Vista operating systems. Note that this book does not contain programming code-level details of the IPv6 protocol for Windows Server 2008 and Windows Vista, such as structures, tables, buffers, or coding logic. These details are highly guarded Microsoft intellectual property that is of interest only to a relative handful of software developers. However, this book does contain details of how the Microsoft implementation of IPv6 in Windows Server 2008 and Windows Vista works for described processes.