PING dongseo.ac.kr (203.241.176.12) 56(84) bytes of data.
64 bytes from kowon.dongseo.ac.kr (203.241.176.12): icmp_seq=1 ttl=237 time=276 ms
64 bytes from kowon.dongseo.ac.kr (203.241.176.12): icmp_seq=2 ttl=237 time=275 ms
64 bytes from kowon.dongseo.ac.kr (203.241.176.12): icmp_seq=3 ttl=237 time=274 ms

--- dongseo.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 274.416/275.362/276.430/0.826 ms