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Posted by Mikey on March 11, 2005, 3:40 pm


Generally no. When you issue a transaction (send a packet), you set
up a route through all the switches and routers. To save time, they
remember the route for a while and you are likely to take the same
route through the switches and come back with approximately the same
round trip time.

It could even be three transactions. One to set up the route (takes a
few milliseconds longer) then two to test the time with the already
setup routing.

Mike

On Wed, 9 Mar 2005 07:18:55 -0000, in alt.satellite.gps "Tumbleweed"

>> Yes, they have take the net delay into account. They send two queries
>> and with a little bit of math, decide how much the delay is and
>> compensate for it.
>> I bet you could even figure out how it is done. Nothing to it,
>> really.
>> Mike
>Except that even on two consecutive messages, the transit times could be
>very different.