PING ns.yangyang.or.kr (218.236.58.215) 56(84) bytes of data.
64 bytes from 218.236.58.215 (218.236.58.215): icmp_seq=1 ttl=49 time=255 ms
64 bytes from 218.236.58.215 (218.236.58.215): icmp_seq=2 ttl=49 time=255 ms
64 bytes from 218.236.58.215 (218.236.58.215): icmp_seq=3 ttl=49 time=255 ms

--- ns.yangyang.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2360ms
rtt min/avg/max/mdev = 255.502/255.592/255.747/0.427 ms