RFC 1884: “IP Version 6 Addressing Architecture” works by using that phrase for a few bits at the conclusion of an IPv6 deal with. (The volume of bits appeared to range in a few unique examples, but this identifier was commonly depending on the MAC-48 handle of the community card.) https://reidviqyf.designertoblog.com/57535165/little-known-facts-about-whatsmyipv4