IPv6 stands for Internet Protocol version 6. It is the second version of the Internet Protocol to be used generally across the virtual 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.
One of the main upgrades in IPv6 is in the number of addresses available for networked devices. For example, each mobile phone or other kind of electronic device can have its own IPv6 address.