IPv6 - Why we need new Internet Protocol
Explosive growth of internet users, devices, apps creates demand for more IP addresses
By Carolyn Duffy Marsan | Network World US | Published: 15:03, 12 June 12
How much IPv4 space is left?
IPv4 addresses are doled out to network operators by the five Regional Internet Registries (RIRs). In January 2011, the free pool of IPv4 addresses that were available to the RIRs ran out. Three months later, APNIC, the RIR in Asia, depleted all but a small pool of IPv4 addresses that it is holding in reserve for start-ups.