RFC 6733 (formerly known as 3588 bis) documents the latest Diameter protocol specifications and was released at the end of 2012 by the Internet Engineering Task Force (IETF). The release of this new standard makes the previous RFC 3588 (Diameter base protocol) and 5719 obsolete. Diameter is the base protocol for authentication, authorization, and accounting (AAA), enabling network access and IP mobility in both home and roaming mobile LTE networks.