PING www.wxdaf.cn (104.21.2.122) 56(84) bytes of data.
64 bytes from 104.21.2.122 (104.21.2.122): icmp_seq=1 ttl=60 time=6.15 ms
64 bytes from 104.21.2.122 (104.21.2.122): icmp_seq=2 ttl=60 time=4.29 ms
64 bytes from 104.21.2.122 (104.21.2.122): icmp_seq=3 ttl=60 time=4.18 ms

--- www.wxdaf.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.186/4.876/6.150/0.901 ms