PING www.ljnet.co.kr (1.247.17.51) 56(84) bytes of data.
64 bytes from 1.247.17.51 (1.247.17.51): icmp_seq=1 ttl=49 time=267 ms
64 bytes from 1.247.17.51 (1.247.17.51): icmp_seq=2 ttl=49 time=267 ms
64 bytes from 1.247.17.51 (1.247.17.51): icmp_seq=3 ttl=49 time=265 ms

--- www.ljnet.co.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 265.067/266.519/267.469/1.201 ms