PING cs101.kaist.ac.kr (185.199.109.153) 56(84) bytes of data.
64 bytes from cdn-185-199-109-153.github.com (185.199.109.153): icmp_seq=1 ttl=61
time=4.49 ms
64 bytes from cdn-185-199-109-153.github.com (185.199.109.153): icmp_seq=2 ttl=61
time=4.23 ms
64 bytes from cdn-185-199-109-153.github.com (185.199.109.153): icmp_seq=3 ttl=61
time=4.31 ms

--- cs101.kaist.ac.kr ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.235/4.350/4.497/0.109 ms