PING www.zhenlicn.com (104.21.3.168) 56(84) bytes of data.
64 bytes from 104.21.3.168 (104.21.3.168): icmp_seq=1 ttl=59 time=4.48 ms
64 bytes from 104.21.3.168 (104.21.3.168): icmp_seq=2 ttl=59 time=4.30 ms
64 bytes from 104.21.3.168 (104.21.3.168): icmp_seq=3 ttl=59 time=4.31 ms

--- www.zhenlicn.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.301/4.366/4.481/0.111 ms