PING ssu.ac.kr (133.186.209.224) 56(84) bytes of data.
64 bytes from 133.186.209.224: icmp_seq=1 ttl=50 time=267 ms
64 bytes from 133.186.209.224: icmp_seq=2 ttl=50 time=266 ms
64 bytes from 133.186.209.224: icmp_seq=3 ttl=50 time=266 ms

--- ssu.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 8688ms
rtt min/avg/max/mdev = 266.589/266.898/267.504/0.428 ms