What is a domain and how does it work?

What is a domain?

A domain is a human-readable internet address, such as intrahost.hu. It helps people reach a website without having to remember its numerical IP address.

A domain usually consists of a name and an extension, also called a top-level domain (TLD). In intrahost.hu, intrahost is the name and .hu is the extension.

How does a domain work?

When someone enters a domain into a browser, the Domain Name System (DNS) helps the browser find the server associated with that domain.

The process works roughly like this:

The visitor enters the domain in a browser.
DNS looks up the records associated with the domain.
The browser connects to the relevant server.
The server sends the website content to the browser.

DNS records can point a domain to a web server, direct email to a mail service, or verify that you control the domain.

Domain name, DNS, and hosting: what is the difference?

These services work together, but they are not the same:

Domain registration gives you the right to use a domain for a specified period, subject to the registry's rules.
DNS tells internet services where to find the resources associated with your domain.
Web hosting provides the server resources where your website's files or application run.

You can register a domain and use it later, point it to an existing website, or connect it to a hosting package. Registering a domain alone does not automatically create a website or include hosting.

How do you register a domain?

To register a domain, choose an available name and extension, then order it through a domain registrar or hosting provider that offers domain registration.

Before registering, consider these points:

Choose a name that is easy to spell and remember.
Check the spelling carefully before placing the order.
Review the registration price and renewal price.
Keep the registrant contact details accurate.
Enable automatic renewal if it suits your needs, and make sure the payment method remains valid.

Domain availability, registration periods, transfer rules, and eligibility requirements vary by extension.

Does a domain need to be renewed?

Yes. Most domains are registered for a limited period and must be renewed to remain under your control. If a domain expires, the website and email services that depend on it may stop working. Depending on the extension and its rules, the domain may eventually become available for someone else to register.

Keep track of the expiration date and make sure renewal notices reach an email address you can access.

Can you use one domain for a website and email?

Yes. A domain can be used for multiple services at the same time. For example, a website can use the domain while email addresses use the same domain name. Different DNS records direct web traffic and email to the appropriate services.

Summary

A domain is your recognisable address on the internet. DNS connects that address to the right services, while hosting provides the environment for a website to run. Choosing a suitable domain and keeping its registration active are important steps in maintaining a reliable online presence.