[TUHS] OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP

Dave Horsfall dave at horsfall.org
Mon Jan 1 09:22:02 AEST 2018

On Sun, 31 Dec 2017, Noel Chiappa wrote:

> > the ARPAnet got converted from NCP to TCP/IP in 1983; ... have a more 
> > precise date?
> No, it was Jan 1.

aneurin% date
Mon Jan  1 10:14:58 EST 2018

What timezone did you say you were in again?  This is the problem when 
expressing historical events...

> It wasn't so much a 'conversion', as that was the date on which, except 
> for a few sites which got special _temporary_ dispensation to finish 
> their preparations, support for NCP was turned off for most ARPANET 
> hosts. Prior to that date, most hosts on the ARPANET had been running 
> both, and after that, only TCP worked. (Non-ARPANET hosts on the 
> then-nascent Internet had always only been using TCP before that date, 
> of course.)

Thanks; I'll amend my notes accordingly.

Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."

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