What Is DNS and Why Does It Matter?

DNS, or Domain Name System, is the invisible layer that connects your domain name to the servers that power your website, email and other services. When someone types your domain into a browser, DNS tells the internet where to go.

Key DNS Record Types You Should Know

• A record: Points your domain to an IPv4 address.
• AAAA record: Points your domain to an IPv6 address.
• CNAME: Maps one hostname to another, ideal for subdomains.
• MX: Directs email for your domain to the correct mail server.
• TXT: Used for verification, SPF, DKIM and other security settings.

How DNS Changes Work

When you change a DNS record, the update does not apply instantly across the globe. DNS changes are cached at different levels, which is why you often see a propagation delay of a few minutes to 24 hours.

Practical Tips

• Always note down existing DNS records before making changes.
• Use short TTL values when testing new settings.
• Use DNS management tools from your hosting or domain provider for better visibility.