说明：  教学实验源代码，提供对滑动窗口协议的实验演示，协议分层和协议软件的设计与实现有基本的认识利用所学数据链路层原理，自己设计一个滑动窗口协议并在仿真环境下编程实现有噪音信道环境下的 可靠的双工通信。信道模型为 8000bps 全双工卫星信道，信道传播时延 270 毫秒，信道误码率为 10-5，信道提供字节流传输服务，网络层分组长度在240~256字节范围
(Teaching experiment source code, on the Sliding Window Protocol provides experimental demonstration of the agreement stratification and protocol software design and implementation of a basic understanding of the use of the data link layer principle, its own design of a sliding window protocol and simulation programming environment the realization of the noise channel environment duplex reliable communication. Channel model for 8000bps full-duplex satellite channel, channel propagation delay of 270 ms, channel bit error rate of 10-5, byte-stream channel to provide transmission services, network layer packet length in the range of 240 ~ 256 bytes)