DNS (Domain Name System) is like the phonebook of the internet. It translates human-readable domain names (like google.com) into IP addresses (like 142.250.80.46) that computers use to communicate with each other.
DNS Record Types
A Record – Maps a domain to an IPv4 address
AAAA Record – Maps a domain to an IPv6 address
MX Record – Specifies mail servers for the domain (with priority)
NS Record – Identifies the authoritative nameservers for the domain
TXT Record – Contains text information, often used for verification (SPF, DKIM, etc.)
CNAME Record – Creates an alias pointing to another domain
SOA Record – Contains administrative information about the zone
Common Uses
Troubleshooting – Verify DNS propagation after making changes
Email Setup – Check MX records for email configuration
Security – Verify SPF, DKIM, and DMARC records in TXT
Website Migration – Confirm DNS changes before and after migration
TTL (Time To Live)
TTL is measured in seconds and indicates how long DNS resolvers should cache the record before checking for updates. Lower TTL means faster propagation but more DNS queries.