The Domain Name System (DNS) is like the phonebook of the Internet. Computers on a network need IPs, the equivalent of phone numbers to communicate. But IPs are hard to remember for humans, so DNS is here so domain names can be used instead. For instance, when going on https://www.google.com/search?q=google, www.google.com is the domain name that DNS will convert is something like 172.217.6.36.

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