PING www.jnbaduk.or.kr (211.115.125.42) 56(84) bytes of data.
64 bytes from project.yescall.com (211.115.125.42): icmp_seq=1 ttl=55 time=254 ms
64 bytes from project.yescall.com (211.115.125.42): icmp_seq=2 ttl=55 time=253 ms
64 bytes from project.yescall.com (211.115.125.42): icmp_seq=3 ttl=55 time=253 ms

--- www.jnbaduk.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2192ms
rtt min/avg/max/mdev = 253.347/253.641/254.175/0.378 ms