A frequently used analogy is that DNS functions as the phonebook
for the internet; it stores the long numerical IP addresses by an easier to remember website address. The hierarchy of domain is read from right to left; a domain name is divided into separate parts, or labels, separated by dots (ex: Extrahop.com) with the farthest right demarking the dominant domain. (In this case, .com) When a user types a domain name into a URL or web address, the computer uses a DNS server to look up the domain name
and redirect the page to the correct IP address.