PING www.dunxun.icoc.cc (104.21.9.108) 56(84) bytes of data.
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=1 ttl=60 time=6.45 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=2 ttl=60 time=4.74 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=3 ttl=60 time=4.72 ms

--- www.dunxun.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.723/5.309/6.455/0.810 ms