这个程序是为模拟网络中TCP的选择重传机制而写的，花了5天时间-the procedure is to simulate network TCP Retransmission choice mechanism to write, spent five days

实时性很好的且稳定的网络损伤仿真工具，可以模拟丢包，延迟，带宽受限，抖动等网络环境，-Timeliness good and stable network impairments simulation tools that can simulate packet loss, latency, limited bandwidth, jitter and other network environments