IPv4 address exhaustion

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IPv4 address exhaustion

The continual depletion of Internet addresses that conform to the original 32-bit IPv4 addressing scheme. IPv4 provides 4.3 billion unique addresses, but they are rapidly being eliminated as remaining addresses are assigned to more and more organizations and devices that go online. The IPv6 128-bit addressing scheme provides "skintillions" of addresses. See IANA, IPv6 and IP address.
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Previous researchers found out that certain organisations were reluctant to invest money on the migration, since IPv4 NAT can provide short term solution and also it is cost-free [19]; as network address translation (NAT) is a technical mechanism that can be made to handle IPv4 address shortage [20].
It is predicted that the IPv4 address shortage will become critical by 2010.