RFC 1884: “IP Version six Addressing Architecture” makes use of that phrase for many bits at the conclusion of an IPv6 deal with. (The number of bits looked as if it would range in a few unique illustrations, but this identifier was normally based on the MAC-forty eight handle of https://fastleanproingredients07294.alltdesign.com/5-tips-about-whatsmyipv4-you-can-use-today-46144343