PING ids.postech.ac.kr (115.68.168.234) 56(84) bytes of data.
64 bytes from 115.68.168.234 (115.68.168.234): icmp_seq=1 ttl=46 time=245 ms
64 bytes from 115.68.168.234 (115.68.168.234): icmp_seq=2 ttl=46 time=242 ms
64 bytes from 115.68.168.234 (115.68.168.234): icmp_seq=3 ttl=46 time=242 ms

--- ids.postech.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 242.758/243.594/245.207/1.140 ms