Re: Network for Sale

["Steven M. Bellovin" <smb () research att com>]

In message <038901c09d22$d2736280$7c4cf9d1 () geeksparadise com>, "davids" writes:
> > And how does "delay" differ from RTT, except for the obvious constant
> > factor?
> >
> > --Steve Bellovin, http://www.research.att.com/~smb
>
>     The RTT is the sum of two delays. There is no simple way to separate
> the two. In general, you don't even know what path the return packets are
> taking. This same problem applies to trying to measure packet loss and using
> the results to influence routing decisions.

I understand that, of course, but since the return path is used for the 
ACKs that clock the transmissions, I suspect that it's a fair 
approximation.  Paul's response to my posting was quite fair, in fact.

                --Steve Bellovin, http://www.research.att.com/~smb