PING com-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=4.97 ms
64 bytes from 104.21.13.203 (104.21.13.203): icmp_seq=2 ttl=59 time=4.73 ms
64 bytes from 104.21.13.203 (104.21.13.203): icmp_seq=3 ttl=59 time=4.69 ms

--- com-www.sz2boys.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.690/4.799/4.972/0.135 ms