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  • 計算機網絡就是把分佈在不同地方具有獨立計算功能的計算機或外部設備連接起來, 通過操縱系統, 軟件通信協議來實現資源共享的系統.
  • 網絡編程模型
    • B/S 模型
    • C/S模型
  • 互聯網普遍使用大端模式(big-endian)
    • little-endian(小端): 低地址放低位
    • big-endian(大端): 低地址放高位
  • Communication Protocol Layers(網絡通信協議層)(自下而上serve to; 自頂向下serve by)
    • Applicaons Layer(應用層)
      • Applications(應用層)
      • Sessions(會話層)
      • Presentations(表現層)
    • Transport Layer(傳輸層)
      • TCP: 面向有鏈接
      • UDP: 面向無鏈接
    • Network Layer(網絡層)
    • DataLink Layer(數據鏈路層)
      • MAC
      • LLC
    • Physical Layer(物理層)
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