wrote:
wondering how the PC 'Atomic Clock' sync utility pgm from
worldtimeserver.com works? How can it sync over the ethernet when
xmit/rcv times are random variables? Or, can it only sync to nearest
second? Anyone know the algorithm used?



Before I read the other replies, and strictly off the top of my head I
would think computer A & B would 'ping'* each other a few times to get
the lag time established (averaged) and then A would send B the time,
adjusted for the trouble getting through the routers and wire along the way.

Dems me thinks.

TBerk
*In this context ping refers to a command sent from one device to
another with a corresponding reply; "are you there?, Yes I am, and it
took x amount of milliseconds to get your answer..."
Think of it like those sonar pings in the submarine biz.