31 Dec
2017
31 Dec
'17
11:10 p.m.
From: Dave Horsfall <dave(a)horsfall.org>
the ARPAnet got converted from NCP to TCP/IP in 1983;
... have a more
precise date?
No, it was Jan 1.
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.)
Noel
31 Dec
31 Dec
11:22 p.m.
New subject: OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP
On Sun, 31 Dec 2017, Noel Chiappa wrote:
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...
the ARPAnet
got converted from NCP to TCP/IP in 1983; ... have a more
precise date?
No, it was Jan 1. 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."
11:47 p.m.
New subject: OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP
On Mon, Jan 01, 2018 at 10:22:02AM +1100, Dave Horsfall wrote:
On Sun, 31 Dec 2017, Noel Chiappa wrote:
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...
I am confident ARPANET did not pin time to AEDT. Even if you go by
UTC you've still got about fifteen minutes to wait for 1 JAN 2018.
khm
the
ARPAnet got converted from NCP to TCP/IP in 1983; ... have a more
precise date?
No, it was Jan 1.
1 Jan
1 Jan
12:15 a.m.
New subject: OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP
On Sun, 31 Dec 2017, Kurt H Maier wrote:
I am confident ARPANET did not pin time to AEDT. Even
if you go by UTC
you've still got about fifteen minutes to wait for 1 JAN 2018.
So am I, but what reference *am* I supposed to use, FFS? The USA is
several zones behind UTC[*], and almost a whole day behind Australia
(where I live).
My "on this day" policy is to use the local time if it can be narrowed to
a particular zone where the event happened (and if it makes sense); if it
was universal e.g. moon landings then I'll use UTC; otherwise I'll use the
commonly-observed date e.g. the start/end of the world wars.
I'm open to suggestions (including FOAD, in which case I'll simply find
something better to do).
[*]
A lingering gripe that explains my latent anti-Americanism goes back to
when I had to support Uniplus 2.2/2.4 (sorta SysIII-ish) on the WICAT
boxes in here in Australia. At installation time, we had to express the
time offset as hours *west* of GMT; this left me with a lingering belief
that Americans didn't want to be perceived as being backwards (yeah. it
saved an entire keystroke out of the dozens that were otherwise required).
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will
suffer."
12:59 a.m.
New subject: OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP
On Mon, Jan 01, 2018 at 11:15:19AM +1100, Dave Horsfall wrote:
My "on this day" policy is to use the local time if it can be narrowed to
a particular zone where the event happened (and if it makes sense); if it
was universal e.g. moon landings then I'll use UTC; otherwise I'll use the
commonly-observed date e.g. the start/end of the world wars.
I support your policy, but I'd say the ARPA in ARPANET makes it at least
feasible to stick with Zulu time for related milestones.
I'm open to suggestions (including FOAD, in which
case I'll simply find
something better to do).
Personally, I've enjoyed your posts marking anniversaries of these
events.
A lingering gripe that explains my latent
anti-Americanism goes back to
The older I get, the more convinced I am that the "two hard things in
Computer Science" quote came from someone who never had to accurately
report the ages of events predating epoch time.
And I can say as a patriotic American, I did not truly understand the
desperate plight of being a foreigner until I was in Cape Town during
the Super Bowl. After that I limited international travel to extremely
profitable endeavors; otherwise the ROI just isn't there.
khm
2306
days inactive
2307
days old
4 comments
3 participants
participants (3)
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Dave Horsfall -
jnc＠mercury.lcs.mit.edu -
Kurt H Maier