On 1/14/2014 4:57 PM, l.wood@xxxxxxxxxxxx wrote: > I don't think sayng 'oh, that error source is no longer a problem' disproves > Stone's overall point about undetected errors, though the > examples he uses from the technology of the day are necessarily > dated. Dismissing the overall point because the examples use obsolete > technology is throwing the baby out with the bathwater; a host-to-host > error check catches things that intermediate checks cannot. > > Measuring error rates across end-to-end Internet traffic is something that has > not received much attention , as error detection is not > instrumented well - hence citing Stone's published work, in the absence > of awareness of anything newer (and as high profile/immediately recognisable > as sigcomm) in the area. > +1 ... the message in the paper is applicable to layered systems and internetworks in general. Changes in the link technology since then don't invalidate it, especially since we know that the technology not only changes rapidly, but also is always growing in diverse directions, such that there things almost universally true today may be turned on their heads tomorrow. Designs for stacking layers need to follow solid general principles in order to be robust to changes (above and below). -- Wes Eddy MTI Systems