Re: Webinar: Ethernet's Emergence from Xerox PARC: 1975-1980

[Grant Taylor via cctalk]

On 3/28/22 12:09 PM, Nigel Johnson Ham via cctalk wrote:
OK, it was wireless, but that brings up another surprise, that wireless 
ethernet came before wired :-)


As others have indicated, I think not.  ;-)

I recently watched the following videos of Bob Metcalfe:

 - Link - Ethernet Briefings in April 1978 by Bob Metcalfe (112 minutes)
- https://youtu.be/Fj7r3vYAjGY

And the follow up:

 - Link - Metcalfe's Law After 40 Years of Ethernet (19 minutes)
- https://youtu.be/f6CJA421aUo

The Ethernet Briefings video goes into fairly good detail comparing and 
contrasting ALOHA net and Ethernet.




--
Grant. . . .
unix || die

Re: Webinar: Ethernet's Emergence from Xerox PARC: 1975-1980

[Paul Koning via cctalk]

> On Mar 28, 2022, at 2:12 PM, Joseph S. Barrera III via cctalk 
>  wrote:
> 
> That was the ALOHA network, which inspired Ethernet but was not Ethernet.

The differences are quite crucial.  ALOHA is a broadcast radio packet network, 
which doesn't have collision detect and probably not carrier sense either.  So 
it's about 1/3rd of Ethernet -- just MA. :-)  A consequence is that the 
theoretical channel capacity is also about 1/3rd; ALOHA tops out around 30% of 
data rate, while Ethernet -- thanks to CS and CD -- can reach pretty much the 
full wire capacity.

paul

Re: Webinar: Ethernet's Emergence from Xerox PARC: 1975-1980

[Joseph S. Barrera III via cctalk]

That was the ALOHA network, which inspired Ethernet but was not Ethernet.

On Mon, Mar 28, 2022 at 11:09 AM Nigel Johnson Ham via cctalk <
cctalk@classiccmp.org> wrote:

> For years I taught my students that the Ethernet was invented at the
> University of Hawaii in 1971!
>
> OK, it was wireless, but that brings up another surprise, that wireless
> ethernet came before wired :-)
>
> cheers,
>
> Nigel
>
>
> Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
> Amateur Radio, the origin of the open-source concept!
> Skype:  TILBURY2591
>
>
> On 2022-03-28 14:02, Tom Gardner via cctalk wrote:
> > Ethernet invented in 1973-74 at Xerox PARC in Palo Alto, CA, evolved over
> > many years.
> >
> >
> >
> > This April 13th Webinar will trace the history and development of
> Ethernet
> > as a 10 Mb/s product up through the release of the DIX (DEC-Intel-Xerox)
> > spec in 1980. This was the starting point for the ongoing IEEE 802.3
> > Standard activities. Speakers include Gorden Bell, Dave Liddle, Bob
> Metcalfe
> > and seven other pioneers who were there for the transition.
> >
> >
> >
> > More detail at  SVTHC
> website
> >
> >
> >
> > Register
> > <
> https://www.eventbrite.com/e/ethernets-emergence-from-xerox-parc-1975-1980-
> > tickets-301085664327>
> >
> >
> >
> > Tom
> >
> >
> >
>

Re: Webinar: Ethernet's Emergence from Xerox PARC: 1975-1980

[Nigel Johnson Ham via cctalk]

For years I taught my students that the Ethernet was invented at the 
University of Hawaii in 1971!


OK, it was wireless, but that brings up another surprise, that wireless 
ethernet came before wired :-)


cheers,

Nigel


Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype:  TILBURY2591


On 2022-03-28 14:02, Tom Gardner via cctalk wrote:

Ethernet invented in 1973-74 at Xerox PARC in Palo Alto, CA, evolved over
many years.

  


This April 13th Webinar will trace the history and development of Ethernet
as a 10 Mb/s product up through the release of the DIX (DEC-Intel-Xerox)
spec in 1980. This was the starting point for the ongoing IEEE 802.3
Standard activities. Speakers include Gorden Bell, Dave Liddle, Bob Metcalfe
and seven other pioneers who were there for the transition.

  


More detail at  SVTHC website

  


Register
  

  


Tom

  

Webinar: Ethernet's Emergence from Xerox PARC: 1975-1980

[Tom Gardner via cctalk]

Ethernet invented in 1973-74 at Xerox PARC in Palo Alto, CA, evolved over
many years. 

 

This April 13th Webinar will trace the history and development of Ethernet
as a 10 Mb/s product up through the release of the DIX (DEC-Intel-Xerox)
spec in 1980. This was the starting point for the ongoing IEEE 802.3
Standard activities. Speakers include Gorden Bell, Dave Liddle, Bob Metcalfe
and seven other pioneers who were there for the transition.

 

More detail at   SVTHC website

 

Register
 

 

Tom