PING www.bigtree.or.kr (180.150.228.143) 56(84) bytes of data.
64 bytes from 180.150.228.143 (180.150.228.143): icmp_seq=1 ttl=121 time=249 ms
64 bytes from 180.150.228.143 (180.150.228.143): icmp_seq=2 ttl=121 time=249 ms
64 bytes from 180.150.228.143 (180.150.228.143): icmp_seq=3 ttl=121 time=249 ms

--- www.bigtree.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2062ms
rtt min/avg/max/mdev = 249.635/249.668/249.713/0.577 ms