The document discusses Internet Protocol (IP) which is the primary protocol in the internet layer of the OSI networking model. IP's job is to deliver packets from source to destination computers. As of 2015, about 97% of web traffic uses IPv4, while IPv6 is now the standard with 128-bit addressing to help simplify the transition from IPv4. IPv6 helps with TCPIP networking and addressing architecture. The current version of IP (IPv4) is becoming outdated as the number of available addresses is dwindling, so IPv6 was created to support more addresses and new features.