Nп/п : 75 из 100
От : Dan Cross 2:5075/128 29 сен 23 14:57:49
К : Johnny Billquist 29 сен 23 18:02:05
Тема : Re: Reading Gordon Bell`s VAX strategy document
----------------------------------------------------------------------------------
@MSGID: 2@reader2.panix.com> 12e0a2b3
@REPLY: 6@news.misty.com> 7c99dc1a
@REPLYADDR Dan Cross
<cross@spitfire.i.gajendra.net>
@REPLYTO 2:5075/128 Dan Cross
@CHRS: CP866 2
@RFC: 1 0
@RFC-Message-ID: 2@reader2.panix.com>
@RFC-References:
<memo.20230924151040.16292R@jgd.cix.co.uk> 4@news.misty.com> <7wh6nehycy.fsf@junk.nocrew.org>
6@news.misty.com>
@TZUTC: -0000
@TID: FIDOGATE-5.12-ge4e8b94
In article
6@news.misty.com>,
Johnny Billquist <bqt@softjar.se> wrote:
>On 2023-09-28 21:49, Lars Brinkhoff wrote:
>> Johnny Billquist wrote:
>>> There were of course development, and testing done between machines
>>> and so on. But that was not "ARPANET". ARPANET was running NCP until
>>> flag day, when it officially switched to IP.
>>
>> NCP and TCP operated in parallel on the ARPANET for a while. The
>> Internet Protocol Transition Workbook from November 1981 encouraged new
>> hosts to only implement TCP, not NCP, and says at that point there were
>> TCP-only hosts. On several occasions during 1982, NCP was temporarily
>> blocked, but TCP was allowed. What happened on flag day was that NCP
>> was permanently blocked.
>>
>> So what I was wondering was: were there any VAXen talking NCP, or did
>> they jump straight to TCP? I`d like to see evidence, not handwaving.
>
>How would they interoperate? TCP and NCP are not exactly compatible in
>any way.
>
>You would basically have to have two different parallel networks, and
>them you might have some machines that would act as gateway between the
>two networks.
Well, the statement was that they existed in parallel, not that
they necessarily inter-operated. But communication between them
was documented in the transition guide, and there were gateways
for a while. I even see some evidence in early sendmail
configurations that there were provisions for sending mail to
NCP gateways (e.g., `usr.lib/sendmail/cf/ncphosts.m4` in 4.1c
BSD; UDEL was the NCP gateway and the file has a comment at the
top that says, "When NCP goes away, so should this file").
- Dan C.
--- trn 4.0-test77 (Sep 1, 2010)
* Origin: PANIX Public Access Internet and UNIX, NYC (2:5075/128)
SEEN-BY: 5001/100 5005/49 5015/255 5019/40 5020/715
848 1042 4441 12000
SEEN-BY: 5030/49 1081 5075/128
@PATH: 5075/128 5020/1042 4441