PING vilac.co.kr (115.68.17.210) 56(84) bytes of data.
64 bytes from mail210.webmaker21.kr (115.68.17.210): icmp_seq=1 ttl=46 time=236 ms
64 bytes from mail210.webmaker21.kr (115.68.17.210): icmp_seq=2 ttl=46 time=236 ms
64 bytes from mail210.webmaker21.kr (115.68.17.210): icmp_seq=3 ttl=46 time=237 ms

--- vilac.co.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 236.935/236.982/237.040/0.563 ms