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  _____     ______    ______     ___      _  __  
 |__  //   /_   _//  /_____//   / _ \\   | |/ // 
   / //     -| ||-   `____ `   | / \ ||  | ' //  
  / //__    _| ||_   /___//    | \_/ ||  | . \\  
 /_____||  /_____//  `__ `      \___//   |_|\_\\ 
 `-----`   `-----`   /_//       `---`    `-` --` 
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Text this: MODULAR SOFTWARE ARCHITECTURE AND IMPLEMENTATION OF OSI UPPER LAYER PROTOCOLS