Names need directions
DNS helps applications find information associated with a domain name, including IP addresses.
In 30 seconds
- A name lookup happens before many connections.
- Cached answers can reduce repeated lookups.
- A working name lookup does not prove the website itself is healthy.
Make it concrete
A directory may give the correct building address while its door is closed. Likewise, DNS and the service behind it are separate checks.
- 01Name
- 02Resolver
- 03Address
Check your understanding
If DNS returns an address, is the website guaranteed to load?
- A name lookup happens before many connections.
- Cached answers can reduce repeated lookups.
- A working name lookup does not prove the website itself is healthy.
Go to the source
Sources reviewed: 13.09.2026