[ih] how big was the host file

[Vint Cerf]

no, it wasn't being rolled out in 1973; i was just thinking about an
attempt to expand IP address space using a device that that we put on the
IMPs in the course of doing packet radio work in the mid/late 1970s. That
was not unlike the addition of more than one host by jiggering the address
fields of the IMPs fairly early in the ARPANET roll out.



v


On Thu, Feb 6, 2020 at 7:46 AM John Day via Internet-history <
internet-history at elists.isoc.org> wrote:

> Yes, 4 hosts per IMP was included in the 64.
>
> The IMP protocols were modified once or twice later in the 70s to allow to
> increase the number of hosts. But I didn’t think that happened as early as
> 1973.
>
> I didn’t realize TCP/IP was being rolled out in 1973. Interesting.
>
> Take care,
> John
>
> > On Feb 6, 2020, at 07:15, vinton cerf <vgcerf at gmail.com> wrote:
> >
> > there was provision for up to 4 hosts per IMP and we even had a "port
> extender" for IP addresses as TCP/IP rolled out. So I don't think 64 was
> the limit.
> >
> > v
> >
> >
> > On Thu, Feb 6, 2020 at 7:10 AM John Day via Internet-history <
> internet-history at elists.isoc.org <mailto:internet-history at elists.isoc.org>>
> wrote:
> > Why was it so large?
> >
> > There certainly weren’t 134 hosts on the ’Net in 1973.  Wasn’t the
> maximum number then still 64?
> >
> > John
> >
> > > On Feb 6, 2020, at 03:28, Lars Brinkhoff via Internet-history <
> internet-history at elists.isoc.org <mailto:internet-history at elists.isoc.org>>
> wrote:
> > >
> > > Jacques Latour wrote:
> > >> How big was the host file before the DNS came in action? 200K entries?
> > >
> > > I'd like to go in the other direction.  What are the smallest recorded
> > > hosts files?
> > >
> > > An MIT hosts file from 1973 was 134 lines.
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