PING www.1dl.cn (104.21.16.1) 56(84) bytes of data.
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=1 ttl=60 time=7.22 ms
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=2 ttl=60 time=4.07 ms
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=3 ttl=60 time=4.07 ms

--- www.1dl.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.070/5.123/7.225/1.486 ms