PING mtbkorea.co.kr (18.239.36.109) 56(84) bytes of data.
64 bytes from server-18-239-36-109.ams58.r.cloudfront.net (18.239.36.109): icmp_seq=1
ttl=251 time=4.74 ms
64 bytes from server-18-239-36-109.ams58.r.cloudfront.net (18.239.36.109): icmp_seq=2
ttl=251 time=4.30 ms
64 bytes from server-18-239-36-109.ams58.r.cloudfront.net (18.239.36.109): icmp_seq=3
ttl=251 time=4.30 ms

--- mtbkorea.co.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.305/4.452/4.745/0.207 ms