Network testing and latency

[Dave Johnson]

Kevin D. Clark writes:
> 
> Dave Johnson writes:
> 
> > Latency and jitter are side effects due to queuing prior to the
> > bandwidth limited hop. 
> 
> I think that latency has more to do with your transmission medium.
> And I think that jitter has more to do with contention.

Ya, I meant to say queuing introduces jitter and latency.  The
transmission delay of the medium adds latency regardless of
congestion.



> > Protocols such as TCP are designed to avoid
> > introducing latency when a slow link is in the path.
> 
> I think that the design of TCP more has to do with using the network
> efficiently and with operating reliably in the presence of congestion.
> 
> I'm not sure how TCP is designed to avoid intoducing latency.  The
> protocol tries to operate reliably but doesn't really make any
> guarantees that the bytestream will make it to the destination by a
> certain time.

Should have said avoid introducing excessive congestion. Latency is a
side-effect of that.

-- 
Dave