PING www.mmdy.cc (104.21.91.12) 56(84) bytes of data.
64 bytes from 104.21.91.12 (104.21.91.12): icmp_seq=1 ttl=60 time=4.31 ms
64 bytes from 104.21.91.12 (104.21.91.12): icmp_seq=2 ttl=60 time=4.30 ms
64 bytes from 104.21.91.12 (104.21.91.12): icmp_seq=3 ttl=60 time=4.37 ms

--- www.mmdy.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.302/4.332/4.378/0.033 ms