What is DNS? How does DNS work? Why do we need DNS?
DNS, an acronym for Domain Name System, is like a telephone directory for the Internet. Instead of looking up telephone numbers using a person's name, IP addresses are looked up using a domain name. For example, the domain name example.com corresponds to DNS can be quickly and transparently updated, allowing a service's IP address to change without affecting end users. Website URLs and email addresses are good examples of services we can use effectively without needing to know a specific IP address, thanks to DNS.