Network for Sale

Thu Feb 22 23:25:51 UTC 2001

In message <038901c09d22$d2736280$7c4cf9d1 at 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