Changes

'''IPv4 (Internet Protocol version 4)''' is the version of internet protocol which defines IP addresses in a 32-bit format. It has been the general standard to deliver information between devices connected to the Internet.<ref>[http://www.ehow.com/about_5497801_history-ip-internet-address.html ehow.com]</ref> The last blocks of IPv4 addresses were allocated by [[IANA]] to the [[RIR|Regional Internet Registries]] in February, 2011.

'''IPv4 (Internet Protocol version 4)''' is the version of internet protocol which defines IP addresses in a 32-bit format. It has been the general standard to deliver information between devices connected to the Internet.<ref>[http://www.ehow.com/about_5497801_history-ip-internet-address.html ehow.com]</ref> The last blocks of IPv4 addresses were allocated by [[IANA]] to the [[RIR|Regional Internet Registries]] in February, 2011. While IPv4 supply has dwindled over the years, supplies have reached a critical point in most regions of the world. As of 24 September 2015, Wired Magazine reported that [[ARIN]] (American Registry for Internet Numbers) reported it had run out of IPv4 addresses altogether. While the dwindling addresses will not impact Internet users too greatly, [[ISP]]s have increasingly felt the pressure to modify their technologies to suit [[IPv6]]. <ref>[http://www.wired.com/2015/09/north-america-just-ran-old-school-internet-addresses/ North America Just Ran Out] Retrieved 28 Sep 2015.</ref>

==Background==

==Background==