[p2p-hackers] UDP file transfer link speed identification

[Daniel Stutzbach]

On Thu, Jul 21, 2005 at 04:58:52PM -0700, David Barrett wrote:
> That's interesting that you monitor not only packet loss, but RTT.  TCP
> makes no mention of monitoring latency.  However, you're also operating
> more aggressively than TCP, so perhaps it doesn't need to.

Measuring latency is critical to TCP's operation.  It computes the
weighted moving average of the RTT as well as the variance of the RTT
estimates to compute the timeout interval.  Otherwise, it wouldn't
know how long to wait before declaring a packet lost.

-- 
Daniel Stutzbach                           Computer Science Ph.D Student
http://www.barsoom.org/~agthorr                     University of Oregon