DNS (Domain Name System) is the system that translates human-readable domain names, like www.example.com, into IP addresses that computers use to identify each other on the internet. It acts as the internet’s phonebook, allowing users to access websites without memorizing complex numerical addresses.
When you type a website address into your browser, the DNS server looks up the corresponding IP address and directs your request to the correct server. This process happens in milliseconds, enabling fast and seamless access to websites, email servers, and online services.
DNS also supports subdomains, email routing, and load balancing, making it essential for the smooth operation of the internet. Without DNS, users would need to remember numeric IP addresses for every website, making navigation impractical.
There are different types of DNS records, including A records (map domain names to IP addresses), MX records (direct email traffic), CNAME records (alias one domain to another), and TXT records (store text information for security and verification).
DNS is a critical part of internet infrastructure, ensuring websites and online services are accessible, reliable, and secure. Security enhancements like DNSSEC (DNS Security Extensions) help protect against cyber threats such as DNS spoofing and cache poisoning.