That is, it calculates how long it takes for the packet to reach the server and to be sent back. It's actually slightly more complicated, because when you ping something you actually send a whole bunch of these PING messages.
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On DirecTV: Channel 206 on SD and HD. On Dish Network: Channel 140 on SD and HD. On AT&T U-Verse: Channel 602 (SD) and 1602 (HD). On Comcast/Xfinity: 35 (SD) and 735 (HD). Time: 9:00 a.m. Pacific. What to watch for: The U.S. was on to the round of 16 before Portugal scored in the final seconds Sunday to forge a tie. So now the U.S. has to do it again.