PING 15.00ok.kr (121.254.249.10) 56(84) bytes of data.
From 61-111-21-89.kidc.net (61.111.21.89) icmp_seq=1 Time to live exceeded
From 61-111-21-89.kidc.net (61.111.21.89) icmp_seq=2 Time to live exceeded
From 61-111-21-89.kidc.net (61.111.21.89) icmp_seq=3 Time to live exceeded

--- 15.00ok.kr ping statistics ---
3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2000ms