PING ip-www.sz2boys.cn (104.21.13.203) 56(84) bytes of data.
64 bytes from 104.21.13.203 (104.21.13.203): icmp_seq=1 ttl=59 time=5.06 ms
64 bytes from 104.21.13.203 (104.21.13.203): icmp_seq=2 ttl=59 time=5.15 ms
64 bytes from 104.21.13.203 (104.21.13.203): icmp_seq=3 ttl=59 time=5.08 ms

--- ip-www.sz2boys.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 5.060/5.097/5.151/0.091 ms