PING www.kuma.or.kr (18.239.69.67) 56(84) bytes of data.
64 bytes from server-18-239-69-67.ams58.r.cloudfront.net (18.239.69.67): icmp_seq=1
ttl=251 time=6.59 ms
64 bytes from server-18-239-69-67.ams58.r.cloudfront.net (18.239.69.67): icmp_seq=2
ttl=251 time=4.59 ms
64 bytes from server-18-239-69-67.ams58.r.cloudfront.net (18.239.69.67): icmp_seq=3
ttl=251 time=4.56 ms

--- www.kuma.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.562/5.250/6.597/0.954 ms