The Domain Name System (DNS) Explained
The Internet's Global Address Book
DNS translates human-readable hostnames (e.g. ariafox.cc) into machine-routable IP addresses (e.g. IPv4 104.21.50.12 or IPv6 2606:4700:3036::6815:320c).
Essential Record Types Inspected
- A & AAAA: Map the domain to IPv4 and IPv6 addresses respectively.
- MX: Defines priority-ordered mail exchanger servers.
- TXT: Carries machine-readable text for SPF, DKIM, and domain ownership verification.
- CAA: Restricts which Certificate Authorities are authorized to issue SSL certificates for your domain.
❓ Frequently Asked Questions
What is TTL in DNS?
TTL (Time to Live) determines how many seconds a DNS record can be cached by resolvers before needing to query the authoritative nameserver again.