From gbhackers.com
![DNS Security](https://i2.wp.com/gbhackers.com/wp-content/uploads/2019/03/DNS-Security.jpg?resize=696%2C363&ssl=1)
Domain Name System or DNS is one of the foundational elements of the entire internet; however, unless you specialize in networking, you probably don’t realize how important it is.
DNS is essentially like a phone book of numbers that computers use for communication. Specifically, these numbers are IP addresses.
This directory is stored on domain name servers around the world, and a site can have more than one IP address.