PING world.kr (211.49.99.9) 56(84) bytes of data.
64 bytes from wblock.opco.co.kr (211.49.99.9): icmp_seq=1 ttl=47 time=247 ms
64 bytes from wblock.opco.co.kr (211.49.99.9): icmp_seq=2 ttl=47 time=246 ms
64 bytes from wblock.opco.co.kr (211.49.99.9): icmp_seq=3 ttl=47 time=246 ms

--- world.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 246.320/246.763/247.547/0.688 ms