PING www.roche-diagnostics.co.kr (104.21.96.1) 56(84) bytes of data.
64 bytes from 104.21.96.1 (104.21.96.1): icmp_seq=1 ttl=60 time=4.32 ms
64 bytes from 104.21.96.1 (104.21.96.1): icmp_seq=2 ttl=60 time=4.33 ms
64 bytes from 104.21.96.1 (104.21.96.1): icmp_seq=3 ttl=60 time=4.32 ms

--- www.roche-diagnostics.co.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.326/4.330/4.338/0.076 ms