This document provides an introduction to IPv6 and addresses some key questions around IPv6 and its similarities and differences to the earlier Y2K issue. It begins by defining the Y2K problem and noting that estimates placed the costs of addressing it between $100-600 billion. In contrast, some say there are no clear business drivers for transitioning to IPv6. However, IPv4 addresses are running out, so IPv6 is needed to support continued growth of devices connecting to the internet. The document goes on to provide more details on IPv4 and IPv6 specifications and transition strategies.