PING vml.hanbat.ac.kr (202.30.46.37) 56(84) bytes of data.
64 bytes from effailab.hanbat.ac.kr (202.30.46.37): icmp_seq=1 ttl=55 time=251 ms
64 bytes from effailab.hanbat.ac.kr (202.30.46.37): icmp_seq=2 ttl=55 time=249 ms
64 bytes from effailab.hanbat.ac.kr (202.30.46.37): icmp_seq=3 ttl=55 time=249 ms

--- vml.hanbat.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2744ms
rtt min/avg/max/mdev = 249.762/250.421/251.717/1.003 ms