DNS is the digital phone book of the internet. It translates easy-to-remember domain names into technical IP addresses.
Why do we need DNS?
Servers communicate using IP addresses, while people find names easier to remember. DNS connects understandable domain names with the correct technical destinations.
Important DNS records
- A record: Points to an IPv4 address.
- AAAA record: Points to an IPv6 address.
- CNAME: Points to another hostname.
- MX record: Specifies the responsible mail server.
- TXT record: Stores additional information, for example for SPF.
What is a DNS cache?
DNS results are cached so websites can be reached more quickly. After a record is changed, it may therefore take some time before the new configuration is visible everywhere.
Conclusion
DNS works in the background but remains essential. It ensures that domains, websites, email services and servers can be connected correctly.
