PING www.cn-snkj.com (104.21.66.69) 56(84) bytes of data.
64 bytes from 104.21.66.69 (104.21.66.69): icmp_seq=1 ttl=60 time=4.87 ms
64 bytes from 104.21.66.69 (104.21.66.69): icmp_seq=2 ttl=60 time=4.92 ms
64 bytes from 104.21.66.69 (104.21.66.69): icmp_seq=3 ttl=60 time=4.68 ms

--- www.cn-snkj.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.682/4.826/4.923/0.103 ms