DNS full form: Domain Name System
The Domain Name System (DNS) is the internet's addressing framework that translates domain names (like example.com) into IP addresses (like 93.184.216.34). It acts as the phonebook of the Internet, enabling browsers and applications to find websites and servers globally.
The unique name identifying a website or network resource
Human-readable labels for internet addresses
The hierarchical, distributed infrastructure managing name resolution
DNS is defined in IETF RFC 1034 and RFC 1035, maintained by ICANN and IANA, and powers virtually every connection made on the Internet.
Key Entities: Domain Name, IP Address, ICANN, IANA, Root Server, Resolver, Authoritative DNS Server
Without DNS, you would have to remember long numeric IP addresses for every website. DNS simplifies access by automatically resolving human-friendly domain names into the correct IPs.
dnslookup.pro
104.26.3.67
The Domain Name System consists of several interconnected components that work together to resolve domain names:
| Component | Role |
|---|---|
| DNS Resolver | Sends the query from your device |
| Root Server | Directs to the correct top-level domain (TLD) |
| TLD Server | Manages domains like .com, .org, .net |
| Authoritative Server | Provides the final IP for the domain |
Learn more: These components work together in milliseconds to translate your domain name request into a usable IP address.
Enter example.com in your browser
Your device contacts a DNS resolver (usually your ISP's)
Resolver queries root server → TLD server → authoritative server
The authoritative server returns the IP: 93.184.216.34
Your browser loads the website using the IP address
While Domain Name System is the primary and most common meaning, DNS can occasionally appear in other technical contexts:
| Context | Full Form | Usage |
|---|---|---|
| Networking (Primary) | Domain Name System | Internet infrastructure |
| Medicine | Deoxyribonucleoside | Biochemistry term |
| Education | Doctor of Nursing Science | Academic degree |
Note: In web hosting, internet technology, and IT discussions, DNS always refers to Domain Name System.
Explore more about DNS and how it works:
Discover how DNS works and why it's essential for every website on the Internet.
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