abort 123 port on windows xp

["note" <notebook163 () 126 com>]

hello,help me!
        I find my windows xp ,all open port 123 udp, sometimes have a user process  open it. but a system process all 
open udp port 123. what it's use ?

  　　　　　　　note
　　　　　　　　notebook163 () 126 com
　　　　　　　　　　2005-05-30




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