Category: DNS & domain

DNS

The system that turns domains into IP addresses.

DNS (Domain Name System) is the "phone book of the internet" — it turns a readable domain (e.g. seometryka.pl) into a server's IP address. Correct DNS record configuration decides whether the site and email work at all. DNS errors can take a site off the network.

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🔗 Related terms

A

A record

Points a domain to the server's IPv4 address.

M

MX record

Points to the server handling the domain's mail.

T

TTL

How long a DNS record may be cached.

D

DNSSEC

Protects DNS against spoofed responses.

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