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  _____      ___      _  _     _____    _    _   
 / ____||   / _ \\   | \| ||  |  ___|| | |  | || 
/ //---`'  | / \ ||  |  ' ||  | ||__   | |/\| || 
\ \\___    | \_/ ||  | .  ||  | ||__   |  /\  || 
 \_____||   \___//   |_|\_||  |_____|| |_// \_|| 
  `----`    `---`    `-` -`   `-----`  `-`   `-`

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發送短信 : Design and implementation of a layer-2 QOS enabled switch