仿真程序：

1．　　OSI参考模型的信息流动过程：设计一个仿真程序，说明OSI参考模型的信息流

动过程以及每层的作用。

2．　　调制和解调：设计一个演示程序，说明调制解调器的调制和解调的过程

3．　　信号的编码：设计一个仿真程序，演示信号的直接编码、曼彻斯特编码、差分曼

彻斯特编码；

4．　　滑动窗口协议：设计一个仿真程序，说明滑动窗口协议的工作过程

5．　　设计一个全双工停等协议

-simulation program : 1. OSI reference model of information flow : design a simulation program, Note OSI Reference Model processes and information flows for each role. 2. Modulation and demodulation : design a demonstration program that the modem modulation and demodulation process 3. The signal coding : a simulation program designed to demonstrate the direct signal coding, Manchester encoding, the difference Manchester encoding; 4. Sliding Window Protocol : design a simulation program that the sliding window protocols process 5. The design of a full-duplex shutdown agreement