DDomain Name System (DNS)

DNS (Domain Name System) is the internet's address book. It translates human-readable domain names—like www.dinosaur.media—into the numerical IP addresses that computers use to locate and connect to websites and services. Without DNS, you'd need to remember long strings of numbers instead of memorable domain names.

For businesses, DNS is critical infrastructure. It determines how quickly your website loads for visitors, affects email deliverability, enables security features like SSL certificates, and supports subdomains for different parts of your business. Poor DNS configuration can slow your site, break email functionality, or make you vulnerable to attacks. It's invisible to most users, but it underpins every online operation.

DNS works through a distributed network of servers. When someone visits your domain, their browser queries a DNS resolver, which checks authoritative nameservers to find the correct IP address. This happens in milliseconds. You control your DNS settings through your domain registrar or hosting provider, configuring records that point traffic to your website, email servers, and other services.

Many businesses overlook DNS management, treating it as a one-time setup. In reality, it requires ongoing attention—especially when changing hosting providers, adding email services, or implementing security measures. Misconfigured DNS records are a common cause of downtime, failed migrations, and security issues.