Re: Did Internet Founders Actually Anticipate Paid, Prioritized Traffic?

 No doubt about that, I'm not defending X.25, which was after all a 
telco plot to kill the datagram. I was wrong, BTW, about the RFNM in 
ARPANET; initially, it was one message at a time, but was enhanced to a 
sliding window in the fullness of time.
Further discussions of this topic should migrate over to the Internet 
History list, internet-history(_at_)postel(_dot_)org; we're way off-topic here.
RB

On 9/15/2010 3:00 PM, Bob Hinden wrote:
> On Sep 15, 2010, at 12:16 PM, Richard Bennett wrote:
>
> > I think it's actually pretty easy to make the case that a circuit-switched 
> > protocol with a sliding window is superior to a stop-and-wait system that 
> > required the RFNM from the receiver before every message. In that sense, X.25 
> > was an upgrade over the ARPANET. One problem with coax-based Ethernet was the 
> > absence of flow control, which caused bad things to happen to the Internet when 
> > IMPs were replaced by Ethernets.
> Well that's one way of looking at it.  Others might draw different conclusions. 
>  This discussion reminds me of the discussion at BBN of X.25 style packet 
> switching vs. the Internet datagram approach.  I think the outcome was clear.
>
> Bob
>
>
> > RB
> >
> > On 9/15/2010 12:04 PM, Bob Hinden wrote:
> > > On Sep 14, 2010, at 5:08 PM, Richard Bennett wrote:
> > >
> > > > I wonder how many people realize that X.25 was a direct descendant of ARPANET, and 
> > > > that BB&N became a leading supplier of X.25 hardware simply by continuing the 
> > > > IMP down its evolutionary path.
> > > I was at BBN at the time this was going on.  BBN implemented X.25 because it needed a 
> > > "standardized" interface to the network instead of BBN's proprietary 1822 interface and 
> > > choose X.25.  X.25 was developed in parallel to the Arpanet and I disagree that it "was a 
> > > direct descendant of ARPANET".  It has a very different interface (connection oriented vs. 
> > > message oriented) that IMHO was not an improvement.
> > >
> > > Bob
> > >
> > > p.s. I suggest that BBN use Ethernet instead but that didn't get any traction.  
> > > I am pretty sure the world would be different had they followed my suggestion.
> > --
> > Richard Bennett
--
Richard Bennett

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