PING subjectguide.ewha.ac.kr (203.255.161.71) 56(84) bytes of data.
64 bytes from subjectguide.ewha.ac.kr (203.255.161.71): icmp_seq=1 ttl=115 time=355 ms
64 bytes from subjectguide.ewha.ac.kr (203.255.161.71): icmp_seq=2 ttl=115 time=248 ms
64 bytes from subjectguide.ewha.ac.kr (203.255.161.71): icmp_seq=3 ttl=115 time=248 ms

--- subjectguide.ewha.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 248.641/284.457/355.839/50.478 ms