If you are preparing your first website, you will encounter terms like domain name, URL, path, and DNS before you ever publish a page. Understanding how these pieces fit together helps you make informed decisions during setup and avoids confusion when something does not load as expected. This article walks through the core concepts using a single hypothetical address as a reference point.
Reading a Hypothetical Website Address
Suppose you are planning a small gardening blog and you write down this address as your target homepage: https://blog.example-garden.com/recipes/spring-salad?season=march#ingredients. This is a hypothetical example used purely for illustration. Before you register anything or build anything, practice reading it from left to right. The segment before the first colon is the scheme, which tells the browser which protocol to use. Here it is https, meaning the browser will request the page over a secure connection. After the :// separator comes the authority section, which contains the domain name blog.example-garden.com. Following the domain is the path /recipes/spring-salad, which points to a specific resource on the server. The question mark introduces parameters, in this case season=march, and the hash sign marks an anchor called ingredients that would scroll the browser to a particular spot on the page.1
Now look only at the domain portion: blog.example-garden.com. Read it from right to left as domain names are structured. The rightmost part, .com, is the top-level domain or TLD. The next label to the left, example-garden, is the second-level domain, which is the part you would typically choose and register. The leftmost label, blog, is a subdomain that the owner can create freely once they control the base domain. Each label is separated by a dot, and each one narrows the scope of the address.2
Write down the full address on paper and draw a line under each part: scheme, domain, path, parameters, and anchor. Label each segment with its role. This simple exercise builds the habit of decomposing any address you encounter, whether it belongs to your own project or to someone else's site. When you later configure your hosting or share links with readers, you will already know which piece controls what.
What a Domain Name Is and How It Is Structured
A domain name is a human-readable address for a web server available on the Internet. Computers communicate using IP addresses, which are long sequences of numbers that are difficult for people to remember and that can change over time. Domain names solve this problem by providing a memorable label that maps to the underlying IP address through the DNS system.2
The structure of a domain name follows a right-to-left hierarchy separated by dots. The TLD sits at the far right and indicates the general purpose or category of the service. Generic TLDs like .com, .org, and .net do not impose particular criteria on who can use them. Other TLDs enforce stricter policies: .gov is reserved for government departments, and .edu is limited to educational and academic institutions. Local TLDs such as .us or .fr may indicate that the resource is associated with a particular country or language. The full list of TLDs is maintained by ICANN.2
Each label between the dots is a case-insensitive character sequence from one to sixty-three characters long. Labels may contain the letters A through Z, the digits 0 through 9, and the hyphen character, but a hyphen cannot appear as the first or last character of a label. The label immediately to the left of the TLD is called the second-level domain. You can create additional subdomains to the left of it, such as developer.mozilla.org or support.mozilla.org, each potentially serving different content.2
How a Full URL Differs from a Domain Name
A domain name identifies the server, but a URL identifies a specific resource on that server. A URL is the address of a unique resource on the internet and is one of the key mechanisms browsers use to retrieve published resources such as HTML pages, images, and stylesheets. In theory each valid URL points to a unique resource, though in practice a URL may point to something that no longer exists or has moved.1
The mandatory parts of a URL are the scheme and the authority. The scheme tells the browser which protocol to use; for websites this is typically HTTPS or HTTP. The authority, separated from the scheme by ://, includes the domain name and optionally a port number. The port is usually omitted because standard web servers use port 443 for HTTPS or port 80 for HTTP. After the authority comes the path, which locates a specific resource on the server. Parameters follow the question mark and provide extra key-value pairs the server can use. The anchor, marked by a hash sign, points to a location within the resource itself and is never sent to the server with the request.1
Understanding this distinction matters when you share links or build navigation. If you give someone only your domain name, they will arrive at your homepage. If you give them a full URL with a path, they will land on a specific page. If the URL includes an anchor, their browser will scroll to a particular section. Knowing which level of specificity you need prevents broken expectations for your visitors.1
What Registering a Domain Name Actually Means
You cannot permanently buy a domain name. Instead, you pay for the right to use it for one or more years. You can renew that right, and your renewal takes priority over other people's applications, but you never own the domain name outright. This system ensures that unused names eventually become available for others to use.2
Companies called registrars manage the process. They use domain name registries to keep track of the technical and administrative information that connects you to your domain. To find out whether a name is available, you can visit a registrar's website, which typically provides a search or whois tool. Alternatively, on a system with a shell you can type a whois command to check whether a name already exists in the registry.2
Check the spelling of your desired domain name carefully before you complete the registration form. Once the payment is processed, the name is registered and you cannot undo the choice. During registration the registrar will ask for your real-world address. Fill it in properly, because in some countries registrars may be required to close the domain if they cannot provide a valid address on request.2
How DNS Connects Your Domain to a Server
When a visitor types your domain name into their browser, a sequence of lookups translates that readable name into the IP address of your server. First the browser asks the visitor's computer whether it already recognizes the IP address from a local DNS cache. If it does, the browser proceeds directly. If not, the computer queries a DNS server whose job is to match registered domain names to IP addresses. Once the IP is resolved, the browser can request content from the correct server.2
DNS databases are stored on servers worldwide, and all of them refer to a few authoritative or top-level DNS servers that manage the system. Whenever a registrar creates or updates information for a domain, that information must propagate to every DNS database. Each server that knows about a domain stores the information for a period before it is automatically invalidated and refreshed by querying an authoritative server. This means there is a window during which different visitors may see different results depending on which DNS server they query.2
As a site owner you do not need to manage DNS servers yourself, but you should understand that changes to your domain's DNS records do not take effect everywhere at the same instant. If you update where your domain points, some visitors may still reach the old location briefly. This is normal behavior of the distributed DNS system rather than an error in your configuration.2
Preparing Your Address Knowledge Before Launch
Record the full URL structure you plan to use before you begin building pages. List your domain name, decide whether you will use subdomains, and sketch the main paths your site will have. Having this written down makes it easier to configure your hosting, set up navigation, and share the correct address with collaborators or early visitors.
Use semantic URLs when you design your page structure. Semantic URLs use words with inherent meaning that anyone can understand regardless of technical knowledge. They are easier for you to manipulate, they clarify for users where they are and what they are reading, and some search engines can use that semantics to improve classification of the associated pages. A path like /recipes/spring-salad communicates far more than a string of random characters or numeric identifiers.1
Keep a simple reference note that maps each part of your address to its function: scheme, domain, path, parameters, and anchor. When you later need to share a specific page, link to a section within it, or troubleshoot why a page is not loading, this mental model lets you identify which component might be wrong. The effort you spend understanding these basics before launch pays off every time you publish, share, or debug your site.1
Frequently asked questions
Is a domain name the same thing as a URL?
No. A domain name identifies the server, while a URL is the complete address of a specific resource on that server. A URL includes the scheme, the domain, and optionally a path, parameters, and an anchor. The domain name is one component within a URL.1
Do I own my domain name once I register it?
You do not own it permanently. You pay for the right to use the domain for a set period, usually one or more years. You can renew that right and your renewal takes priority over other applicants, but the name itself is never yours outright.2
Why does my new domain not work immediately after registration?
DNS information must propagate across servers worldwide. Each DNS server stores records for a period before refreshing them from authoritative servers. During this window, some visitors may not yet resolve your domain to the correct IP address. This is normal behavior of the distributed DNS system.2