Domain Name Hierarchy Explained

Figure 2 domain name system hierarchy as another example for those familiar with the standard file system found on computers. And this is indeed what we do but instead of networks we use the term domain steve s explanation definition of a domain. The domain name lies at the top of the hierarchy.

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A fully qualified domain name fqdn is a domain name that is completely specified with all labels in the hierarchy of the dns having no parts omitted.

Domain name hierarchy explained. The names in the dns form a hierarchical tree structure. It specifies all domain levels including the top level domain and the root zone. To denote the top of the dns tree. It consists of two parts the host name and the domain name.

These names are of individual labels which are subsequently divided through dots. The resolver navigates it s way down the tree until it gets to the last left most part of the domain name and then looks within that location for the information it needs. At the absolute top is the dns root domain which is nameless. Traditionally a fqdn ends in a dot.

It is essential to know about fully qualified domain name fqdn to understand the dns hierarchy. A domain is equivalent to a folder and a computer name equivalent to a file and a folder can contain either a file or a folder. Every dns domain must have a domain name. This is called the domain namespace.

Information about a host such as its name its ip address and occasionally even it s function are stored in one or more zone files which together compose a larger zone often referred to as a domain. Hierarchy of the domain name domain names have many subdomains organised in a hierarchical system from right to left. A fqdn is the domain name that specifies its exact location in the dns hierarchy. If you use dns for naming service without connecting to the internet you can use any name for the domains and subdomains.

People with networks of any size can join the internet by registering their domain name in either the organizational or the geographical hierarchy. Every dns domain must have a domain name. People with networks of any size can join the internet by registering their domain name in either the organizational or the geographical hierarchy. If your site wants to use dns for naming service without connecting to the internet you can use any name your organization wants for its your domains and subdomains if applicable.

A domain name is an identification string that defines a realm of administrative autonomy authority or control within the internet wiki definition of a domain.