> On Oct 21, 2021, at 08:55 , Mel Beckman <m...@beckman.org> wrote: > > >> On Oct 21, 2021, at 8:19 AM, Owen DeLong <o...@delong.com >> <mailto:o...@delong.com>> wrote: >> >> No, but you are ignoring the point of my message… >> >> The TCP/IP internet existed _BEFORE_ the flag day you mentioned. The flag >> day was the end of NCP, not the beginning of TCP/IP. IIRC, at the time, > > Owen, > > But we’re not talking about the birth of TCP/IP. We’re talking about the > birth of the capital-I Internet, which by definition runs exclusively on > TCP/IP, and that didn’t start until Jan 1, 1983. Although there was > experimentation using IP during 1982, that was still ARPANET. It was the > guaranteed exclusive availability of IP that made 1983 the Internet’s birth > date.
IMHO, that’s an absurd definition. It was still ARPANET after January 1, 1983 too. Prior to 1982, it was ARPANET on NCP. During 1982, it was ARPANET running on NCP+TCP/IP, much like the Internet runs dual stack today on IPv4 and IPv6. In 1983, NCP was removed from most of the backbone, as I hope will happen with IPv4 in the next few years. > And no, it’s not analogous to the eventual IPv6 transition, because both IPv5 > and IPv4 are Capital-I Internet standard protocols. You’re picking arbitrary definitions of Capital-I Internet standards. NCP was every bit as standardized as TCP/IP in 1982. Both were documented in the same IEN series of documents. IEN later (well after TCP/IP) evoked to become RFC. Don’t believe me? Look at the hosts.txt file from IPv4 days which still referenced IEN116. Owen
