PING old.kjahwal.or.kr (210.122.4.175) 56(84) bytes of data.
64 bytes from 210.122.4.175 (210.122.4.175): icmp_seq=1 ttl=57 time=251 ms
64 bytes from 210.122.4.175 (210.122.4.175): icmp_seq=2 ttl=57 time=251 ms
64 bytes from 210.122.4.175 (210.122.4.175): icmp_seq=3 ttl=57 time=251 ms

--- old.kjahwal.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 251.299/251.472/251.804/0.624 ms