PING aradental.kr (104.21.53.8) 56(84) bytes of data.
64 bytes from 104.21.53.8 (104.21.53.8): icmp_seq=1 ttl=60 time=4.24 ms
64 bytes from 104.21.53.8 (104.21.53.8): icmp_seq=2 ttl=60 time=4.20 ms
64 bytes from 104.21.53.8 (104.21.53.8): icmp_seq=3 ttl=60 time=4.20 ms

--- aradental.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.200/4.218/4.247/0.056 ms