What is a domain? In simple words.

Started by Helen, Oct 23, 2022, 07:07 AM

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HelenTopic starter

A domain or domain name is the address of a website on the Internet. When one or another user types your domain name in the search bar, his gadget understands what address to send the request to, thereby opening your site and so on.


The entire domain name space of the websites of the entire Internet is concentrated in the DNS. Thanks to this, all domains are concentrated in the hierarchy of a single system and can easily be defined as physical IP addresses of specific sites (because one server can contain many sites with a unique address). A fully qualified domain name can consist of many levels and is defined by the so-called FQDN - a fully qualified name, the full record of which includes the names of all levels written from left to right, separated by a dot, and ending with a domain zone. For example: mesample.qtw-03.office2.exmpl.com, where com is the first (or top) level, exmpl is the second, and so on, and mesample is the fifth. :D


Each web site has an IP address, but it is difficult to remember it, since it is a set of numbers. Therefore, for easy memorization and quick access, the site also has a domain name, which we enter in the address bar.

For example, dnray.com:

.com in this case is a first-level domain;
dnray is a second—level domain.
The first—level domain is also called a domain zone, they denote either territorial affiliation (de— Germany, by — Belarus, ua — Ukraine, uk - UK), or the subject of the site (com — commercial company, info — information resource, edu — educational resource). The second-level domain is invented by the site owner himself.

The domain cannot be bought, only rented. The registration and management of first-level domain names is handled by the international organization ICANN (Internet Corporation for Assigned Names and Numbers, "Corporation for the Management of Domain Names and IP Addresses").
It introduces new first-level domains in coordination with business corporations and states.

You can register your domain through domain name registrars. The fantasy of the site owner, however, is limited by some rules, for example, for the ru top-level domain, the name must be more than one character and less than 63 and contain Latin letters.
You can check whether the domain name is not occupied on the Whois service.