PING ccba.chungbuk.ac.kr (112.220.81.148) 56(84) bytes of data.
64 bytes from 112.220.81.148 (112.220.81.148): icmp_seq=1 ttl=55 time=272 ms
64 bytes from 112.220.81.148 (112.220.81.148): icmp_seq=2 ttl=55 time=273 ms
64 bytes from 112.220.81.148 (112.220.81.148): icmp_seq=3 ttl=55 time=274 ms

--- ccba.chungbuk.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 272.270/273.425/274.864/1.077 ms