• Fabian Sinner
  • February 27, 2024

Table of content


    A domain, also known as a domain name in the context of the Internet, is a unique address that is used to identify a website. It allows users to easily find and access a website without having to memorize complex IP addresses (Internet Protocol addresses), which consist of a series of numbers.

    It typically consists of at least two main parts: the name of the website and the top-level domain (TLD), separated by a dot; for example, “”.

    How is a domain structured?

    A domain is structurally divided into different parts to ensure a clear hierarchy and uniqueness on the Internet. The division of a domain from right to left reflects its hierarchy, with the most general category (the top-level domain) furthest to the right and the most specific term (often referred to as the second-level domain) to the left. Additional sublevels can be added further to the left to extend the structure.

    • Top-level domain (TLD): This is the part on the far right. It indicates the most general category of the domain. TLDs are divided into two main categories: generic TLDs (gTLDs) such as “.com”, “.org”, “.net”, which are not country-specific, and country-specific TLDs (ccTLDs) such as “.de” for Germany and “.uk” for the United Kingdom.
    • Second-level domain (SLD): This is the part directly to the left of the TLD, which represents the unique name that the owner has chosen for their website. In the case of “”, “example” is the second-level domain. This level is often the most recognizable part of the domain, as it usually reflects the name of the organization, company or project.
    • Third-level domain and further subdomains: Links from the second-level domain can be used to add extra levels (subdomains) to further structure the website or specify specific areas within the website. An example would be “”, where “blog” is a subdomain of “”. They can be used for different purposes, such as different language versions of the website, different product lines, or specific service offerings.
    • Hostname: In some contexts, the specific hostname may still appear on the far left of the address, as in “”, where “www” traditionally serves as a reference to the World Wide Web, but is technically a subdomain.

    What is the function of a domain?

    A domain performs several basic functions on the Internet that are essential for navigation and organization. They convert the numerical IP addresses that computers use into human-readable names. This makes it easier to find and remember websites without having to memorize long strings of numbers.

    Each domain provides a unique identity on the Internet. This helps organize the Internet by ensuring that each website has an address that distinguishes it from others. Companies and individuals can reflect their brand or name in their domain, which helps with branding.

    Domains allow users to directly access different areas of the Internet. By typing a name into the address bar of a browser, users can quickly and efficiently access the website or resource they are looking for.

    A concise and relevant domain name can also improve the visibility of a website in search results. They normally contain keywords related to the content or industry of the website can also help to achieve higher rankings in search results.

    A professional domain contributes to credibility and trust among users. They are also used for email addresses, which allows for consistent and professional communication with customers and partners. An email address that is tied to a domain looks more professional than one that comes from a free email service.

    What is the difference between the name and the URL?

    A domain name is a part of a network address that identifies Internet resources and assigns an easy-to-remember name to an IP address. It consists of a sequence of characters that represent the unique name of a website, such as “”.

    The name is an essential part of a URL, but it does not represent the entire address. It allows users to easily find and access a website without having to know the numerical IP address.

    A URL is a complete Internet address that is used to access a specific resource. It contains not only the domain name, but also other important information that indicates the exact location of a specific page or document on a server.

    A typical URL might look like this: “”, where “http://” indicates the protocol, “” is the domain name and “/index.html” is the path to the specific page on the server.

    In summary, the domain name is the part of a URL that indicates the name of the website, while the URL is a complete address that is used to access a specific resource within that website. The URL contains the domain name as part of its structure, along with other elements such as protocol, path, and sometimes an anchor or query string.

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