RFC 1884: “IP Model six Addressing Architecture” uses that phrase for many bits at the end of an IPv6 deal with. (The amount of bits seemed to differ in some different examples, but this identifier was ordinarily depending on the MAC-forty eight handle of the network card.) IP version 6 https://zanefkpuz.hamachiwiki.com/625885/whatsmyip_can_be_fun_for_anyone