[ntp:questions] Client doesn't drop failed source

Rick Jones rick.jones2 at hp.com
Mon Jan 11 23:47:52 UTC 2010


David Woolley <david at ex.djwhome.demon.invalid> wrote:
> For a start, if it dropped a source on the first missing reply it
> would result in clock hopping, which is undesirable.  UDP is
> unrliable, and you cannot rely on getting every query returned.

In that sense then, even TCP is unreliable for it cannot guarantee
getting every query returned.  What distinguishes TCP from UDP is that
TCP will make multiple attempts to deliver the data and then signal
the probable (but not certain) non-delivery of data.

rick jones
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