PING www.551773.com (104.21.12.4) 56(84) bytes of data.
64 bytes from 104.21.12.4 (104.21.12.4): icmp_seq=1 ttl=60 time=7.46 ms
64 bytes from 104.21.12.4 (104.21.12.4): icmp_seq=2 ttl=60 time=4.31 ms
64 bytes from 104.21.12.4 (104.21.12.4): icmp_seq=3 ttl=60 time=4.44 ms

--- www.551773.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.311/5.406/7.463/1.457 ms