On Oct 20, 2021, at 14:19 , bzs@theworld.com wrote:
On October 20, 2021 at 16:08 mel@beckman.org (Mel Beckman) wrote:
Mark,
Before 1983, the ARPANET wasn’t an internet, let alone The Internet. Each ARPANET connection required a host-specific interface (the “IMP”) and simplex Network Control Protocol (NCP). NCP used users' email addresses, and routing had to be specified in advance within each NCP message.
I think you mean before 1982. TCP/IP was deployed starting in 1982. NCP was deprecated (removed from the ARPANET) January 1, 1983, but TCP/IP was implemented (and deployed) prior to that.
Then again there were IMPs fitted to various systems like TOPS-10, ITS, Vax/BSD Unix, IBM370, etc.
So was that really all that different from ethernet vs, oh, wi-fi or fiber today, you needed an adapter?
It really wasn’t, but even if you just want to count from TCP/IP forward, 1983 isn’t the correct date. 1983 was when we turned off NCP. It wasn’t when we turned on TCP/IP. The turn on of TCP/IP occurred over several months, so there’s no particular date that can be assigned to it. Owen