PING coursera.org (18.239.50.105) 56(84) bytes of data.
64 bytes from server-18-239-50-105.ams58.r.cloudfront.net (18.239.50.105): icmp_seq=1
ttl=251 time=5.76 ms
64 bytes from server-18-239-50-105.ams58.r.cloudfront.net (18.239.50.105): icmp_seq=2
ttl=251 time=3.85 ms
64 bytes from server-18-239-50-105.ams58.r.cloudfront.net (18.239.50.105): icmp_seq=3
ttl=251 time=3.85 ms

--- coursera.org ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 3.850/4.490/5.767/0.902 ms