PING www.c16717.cn (104.21.112.1) 56(84) bytes of data.
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=1 ttl=60 time=4.92 ms
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=2 ttl=60 time=4.69 ms
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=3 ttl=60 time=4.59 ms

--- www.c16717.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.598/4.739/4.922/0.146 ms