PING sadd.or.kr (18.239.105.60) 56(84) bytes of data.
64 bytes from server-18-239-105-60.ams1.r.cloudfront.net (18.239.105.60): icmp_seq=1
ttl=251 time=4.63 ms
64 bytes from server-18-239-105-60.ams1.r.cloudfront.net (18.239.105.60): icmp_seq=2
ttl=251 time=4.43 ms
64 bytes from server-18-239-105-60.ams1.r.cloudfront.net (18.239.105.60): icmp_seq=3
ttl=251 time=4.31 ms

--- sadd.or.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.318/4.461/4.630/0.149 ms