PING leesanghun.kr (61.111.254.203) 56(84) bytes of data.
64 bytes from mail57.byus.net (61.111.254.203): icmp_seq=1 ttl=50 time=264 ms
64 bytes from mail57.byus.net (61.111.254.203): icmp_seq=2 ttl=50 time=263 ms
64 bytes from mail57.byus.net (61.111.254.203): icmp_seq=3 ttl=50 time=264 ms

--- leesanghun.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 263.627/264.062/264.372/0.672 ms