In the mid 1990s, we started to run into an ever shrinking pool of IPv4 addresses. According to the Wall Street Journal, February 1, 2011, was the week the last batch of Internet addresses was doled out.
Ipv6), is built into Windows Server 2008. Ipv6 is a new suite of protocols developed to ensure growing Internet client needs. The IPv4 scalability will no longer meet the challenges ahead.