The total number of unique IP addresses available under the IPv4 format is limited to approximately 4,294,967,296 (232)billion, <ref>[http://www.techterms.com/definition/ipv4 techterms.com]</ref> however it is not enough to cope with projected Internet demand.<ref>[http://www.iana.org/about/glossary/ www.iana.org]</ref> because of the increasing reliance on personal computers, wireless communication devices and radio frequency identification (RFID) tags etc. The Internet Engineering Task Force ([[IETF]]) predicted that the available IP addresses will be depleted as early as 2011. | The total number of unique IP addresses available under the IPv4 format is limited to approximately 4,294,967,296 (232)billion, <ref>[http://www.techterms.com/definition/ipv4 techterms.com]</ref> however it is not enough to cope with projected Internet demand.<ref>[http://www.iana.org/about/glossary/ www.iana.org]</ref> because of the increasing reliance on personal computers, wireless communication devices and radio frequency identification (RFID) tags etc. The Internet Engineering Task Force ([[IETF]]) predicted that the available IP addresses will be depleted as early as 2011. |