DNS
DNS (Domain Name System) is a system that translates website names into IP addresses.
It allows you to open websites using simple names like google.com instead of long numbers.
How DNS works
When you type a website address into your browser, your device does not understand words — it needs an IP address. DNS servers quickly look up the correct IP address for the domain name and send it back to your device. Only after that can your browser connect to the website. All of this happens in milliseconds.
Why DNS is important
Without DNS, you would have to remember IP addresses for every website you want to visit. DNS makes the internet easy, fast, and user-friendly.
DNS helps with:
- opening websites
- loading pages faster
- organizing the internet
- directing traffic to the correct servers
Main types of DNS servers:
- Recursive resolver — receives your request and looks for the answer
- Root DNS server — knows where to find top-level domains
- TLD server — handles domains like .com, .org, .de
- Authoritative server — stores the final IP address for a domain
You don’t see this process, but it happens every time you visit a website.
DNS and security
DNS can also help protect users by blocking harmful or fake websites. Some DNS services are faster or more secure than others.
A simple example
Imagine asking a friend for someone’s phone number. Your friend checks a contact list and gives you the number. DNS does the same thing — it finds the IP address for a website name.
Related terms
- What is IP Address?
- What is Router?
- What is Hosting?
Source
Information simplified from the Wikipedia article “Domain Name System (DNS)”.