10.1.2.2. TCP/IPv6
Nobody expected the Internet to grow as fast as it does. IP
proved to have quite some disadvantages when a really large number
of computers is in a network, the most important being the
availability of unique addresses to assign to each machine
participating. Thus, IP version 6 was deviced to meet the needs of
today's Internet.
Unfortunately, not all applications and services support IPv6,
yet. A migration is currently being set in motion in many
environments that can benefit from an upgrade to IPv6. For some
applications, the old protocol is still used, for applications that
have been reworked the new version is already active. So when
checking your network configuration, sometimes it might be a bit
confusing since all kinds of measures can be taken to hide one
protocol from the other so as the two don't mix up connections.
More information can be found in the following documents: