[ Thanks to Andrew
Weber for this link. ]
“We are still going to have IPv4 for the foreseeable future, the
next 10 years or so. But IANA the governing body of the internet
are running out of IPv4 Addresses. The central body are down to
their last /8(1000 addresses) as is the Asia Pacific Local
Authority. This means that in the APAC region IPv4 will only be
issued to customers who can prove they are implementing IPv6 but
have a proven need for the addresses. Public addresses are a
limited resource that is running out.“IPv6 addressed being so much longer have vastly more addresses,
trillions per person on earth so it is difficult to see how we
could run out of IPv6 addresses. Technology improvements in the
header of IPv6 will allow for better access and sharing of
resources though built in Quality of Service (QoS), for example
Remote Desktop Protocol (RDP) will require a constant bandwidth
stream whereas as http, the main web browsing protocol works well
with less consistent bandwidth . Major factors in adoption will
also the automation features built-in to IPv6 where services such
as gateways and DNS can be detected on the network without
configuration.”