PING kookmin.ac.kr (113.198.215.98) 56(84) bytes of data.
64 bytes from 113.198.215.98: icmp_seq=1 ttl=49 time=241 ms
64 bytes from 113.198.215.98: icmp_seq=2 ttl=49 time=240 ms
64 bytes from 113.198.215.98: icmp_seq=3 ttl=49 time=239 ms

--- kookmin.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2144ms
rtt min/avg/max/mdev = 239.929/240.438/241.387/0.878 ms