IPv4, the most popular and used addressing system in the internetworking, has been exhausted and organizations can no longer avail for the free block of IPv4 addresses. In order to compensate this exhaustion of IP addresses, a new addressing mechanism called IPv6 has already been in use. While IPv6 is more advanced and sophisticated than the IPv4, there are many projects going on to encourage the use of IP version 6. The world is going to celebrate the IPv6 launch day in coming June 6.

