Why is IPv6 important?
Put simply, it is no longer possible for the Internet Assigned Numbers Authority (IANA) to allocate new network addresses under the old protocol running the Internet, IPv4. This does not mean the Internet itself is running out. It does however limit the applicability of all new installations. Many organisations have existing reserves of IPv4 space but the time will come when no new addresses can be assigned. Adoption of IPv6 needs to happen to allow the Internet...