PING calslab.snu.ac.kr (147.47.106.225) 56(84) bytes of data.
64 bytes from bm.snu.ac.kr (147.47.106.225): icmp_seq=1 ttl=117 time=252 ms
64 bytes from bm.snu.ac.kr (147.47.106.225): icmp_seq=2 ttl=117 time=247 ms
64 bytes from bm.snu.ac.kr (147.47.106.225): icmp_seq=3 ttl=117 time=245 ms

--- calslab.snu.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 245.514/248.490/252.333/2.907 ms