Priscilla,
Well put. Thanks!
----- Original Message -----
From: Priscilla Oppenheimer <[EMAIL PROTECTED]>
To: Jack Williams <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Monday, January 22, 2001 4:29 PM
Subject: Re: FWD: RE: EASY ?? FOR MOST OF YOU
> At 03:37 PM 1/22/01, Jack Williams wrote:
>
> >The propagation delay for Ethernet must not be greater than 512 bit times
or
> >you'll get late collisions (as Tim said). Since the speed of light is
> >constant and 10-baseT bits last 10 times longer than 100-baseT bits, that
> >directly influences how long of a cable you can run!
> >
> >That sounded like Nonsense, didn't it?
>
> It doesn't sound too much like nonsense. :-) I think the part that people
> miss when they read the jargon in some books is the relationship between
> 512 bit times and 64 bytes. 64 x 8 = 512. The minimum size frame is 64
> bytes. It takes 512 "bit times" to send it. Sounds obvious, but I think we
> miss the obvious sometimes....
>
> The physical size of the network is limited so that a station is still
> sending the minimum size frame (64 bytes) if a collision occurs and
> reflects back to the sender. If the sender were not still sending, the
> frame would have to be retransmitted by a higher layer. For an upper layer
> to notice that the frame needs retransmitting takes much more time.
> Ethernet retransmissions occur within nanoseconds usually.
>
> Priscilla
>
>
> >------Original Message------
> >From: [EMAIL PROTECTED] (Timothy Metz)
> >To: Alvarado Jesus <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
> >Sent: January 22, 2001 7:43:48 PM GMT
> >Subject: RE: EASY ?? FOR MOST OF YOU
> >
> >
> >It's B.
> >
> >I think we just had this discussion not too long ago, it was quite a long
> >thread with a lot of discussion on slot time (or the Cisco equiv term).
> >
> >Tim
> >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> > > Alvarado Jesus
> > > Sent: Monday, January 22, 2001 8:11 PM
> > > To: '[EMAIL PROTECTED]'
> > > Subject: EASY ?? FOR MOST OF YOU
> > >
> > >
> > > The network span of a 100Base-T Network (205) meters is approx. 10
times
> > > smaller than the network span of a 10Base-T network (2500) meters
Because
> > > ....
> > >
> > > A) , Higher speed data signals attenuate more quickly and so cannot
be
> > > transmitted that far
> > >
> > >
> > > B) . Both Networks have minimum frame sizes of 64 bytes and the
network
> > > spans must be tied directly to the minimum frame transmission
> > > time to avoid
> > > collisions.
> > >
> > > _________________________________
> > > FAQ, list archives, and subscription info:
> >http://www.groupstudy.com/list/cisco.html
> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> >_________________________________
> >FAQ, list archives, and subscription info:
> >http://www.groupstudy.com/list/cisco.html
> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> >
> >
> >
> >_________________________________
> >FAQ, list archives, and subscription info:
> >http://www.groupstudy.com/list/cisco.html
> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
>
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
>
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
