PING cyberexpo.co.kr (219.251.142.101) 56(84) bytes of data.
64 bytes from 219.251.142.101 (219.251.142.101): icmp_seq=1 ttl=241 time=256 ms
64 bytes from 219.251.142.101 (219.251.142.101): icmp_seq=2 ttl=241 time=256 ms
64 bytes from 219.251.142.101 (219.251.142.101): icmp_seq=3 ttl=241 time=255 ms

--- cyberexpo.co.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 255.911/256.059/256.196/0.595 ms