A very good video explanation of IPv6 protocol. Todd Lammle explains how IPv6 works.

IPv6 stands for Internet Protocol version 6. It is the second version of the Internet Protocol to be used generally across thevirtual world. The first version was IPv4. IPv5 was a protocol of a different sort, intended to support video and audio rather than all-purpose addressing. IPv6 is also known as IPng, which stands for IP Next Generation.