PING pressbooks.com (108.156.60.57) 56(84) bytes of data.
64 bytes from server-108-156-60-57.ams1.r.cloudfront.net (108.156.60.57): icmp_seq=1
ttl=251 time=4.35 ms
64 bytes from server-108-156-60-57.ams1.r.cloudfront.net (108.156.60.57): icmp_seq=2
ttl=251 time=4.11 ms
64 bytes from server-108-156-60-57.ams1.r.cloudfront.net (108.156.60.57): icmp_seq=3
ttl=251 time=4.20 ms

--- pressbooks.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.112/4.225/4.355/0.113 ms