sting 一个基于TCP的网络测量工具，可以设定远程IP 端口号，测量线程的RTT和丢包率-Here is the output from a sample session: [savage1]# ./sting www.cnn.com Connection setup took 80 ms src = 128.95.219.227:10241 (1753156211) dst = 207.25.71.25:80 (347132509) dataSent = 100,