滑动窗口协议是计算机网络中为保证流控制和可靠而常用的一种协议，它一般在传输层TCP协议中实现。本代码实验滑动窗口协议中的1比特滑动窗口协议、回退N帧协议和选择性重传协议。-Sliding window protocol is a computer network in order to ensure the reliable flow control and a protocol commonly used, it is usually in the transport layer TCP protocol implementation. The sliding window protocol code in the experiment 1-bit sliding window protocol, the frame agreement back N and selective retransmission protocol.