IPv6: A Primer

This paper looks at the evolution of the Internet Protocol1 version 4 (IPv4) into version 6 (IPv6). It includes an introduction to IPv6, an overview of the limitations of IPv4, IPv6 features, key differences between the two protocols and the driving forces behind the need for transition. This is a must read for anyone who wants to understand how IPv6 works and why IPv4 needs to be replaced.