PING wy7tbmdu.n.jackcdn.com (103.232.221.21) 56(84) bytes of data.
64 bytes from 103.232.221.21 (103.232.221.21): icmp_seq=1 ttl=56 time=253 ms
64 bytes from 103.232.221.21 (103.232.221.21): icmp_seq=2 ttl=56 time=251 ms
64 bytes from 103.232.221.21 (103.232.221.21): icmp_seq=3 ttl=56 time=250 ms

--- wy7tbmdu.n.jackcdn.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 250.599/251.790/253.513/1.375 ms