PING www.delsa.or.kr (211.255.23.42) 56(84) bytes of data.
64 bytes from 211.255.23.42 (211.255.23.42): icmp_seq=1 ttl=52 time=254 ms
64 bytes from 211.255.23.42 (211.255.23.42): icmp_seq=2 ttl=52 time=254 ms
64 bytes from 211.255.23.42 (211.255.23.42): icmp_seq=3 ttl=52 time=254 ms

--- www.delsa.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 254.311/254.474/254.739/0.189 ms