[ntp:questions] Garmin 18 LVC: whether to fudge

Uwe Klein uwe_klein_habertwedt at t-online.de
Mon Feb 16 08:02:04 UTC 2009


Danny Mayer wrote:
> 
> Be warned that ping uses ICMP and not UDP so the costs are different.


Danny,

we are looking at the physical transport layer i.e.
"physical link layer" which does not care about protocol.

Latencies on a DSL line are impacted by packet size,
effective datarate, lookahead error correction
and some ancilary stuff _per_ direction.

Aditionally depending on configuration up and down stream
utilisation can have impact on the opposite path.

uwe




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