The domain is the name that identifies a website. It can be said that it is the equivalent of the name of a person or the license plate of a car, but in a way applied to an Internet page. Domains always end with an extension (for example .com .es or .org).

A domain is linked to that web page, so that users who search the Internet by the specific name that has been chosen for the domain will be able to find it easily.

History of domains

We must go back to the origins of the Internet when it was still called Arpanet.

Before using the domains, the Arpanet computers were registered in a file called hosts.txt that was synchronized on all the computers that were part of the network. Everyone was aware of the addresses of each of the users that made up that network.

Later, recognizing that it was a poor system, they decided to centralize the file on a single server, but as Arpanet grew, this momentary solution was not successful either.

Engineers Paul Mockapetris and Jon Postel were the ones who proposed introducing a domain name system to be administered by the US Department of Defense.

With the system they designed, it was possible to associate previously registered domain names with the IP addresses of the connected computers. That was the origin of what would later be included on the Internet.

The new domain organization meant that extensions were added to more optimally structure the different domains.

In 1985, six domain extensions began to be used that are still in force today: .com (commerce), .net (network infrastructures), .org (organizations), .gov (government and public entities), .mil (Department Defense Department) and .edu (education services).

Parts of a domain

In the domain there are two parts: name and extension.

  1. Name: It refers to the name of the company, brand, that of the individual or any concept that is associated with the theme of a website.
  2. Domain extensions: It is the final part of the domain name that has been chosen. The extensions are associated with the nature of the website that has been created. For example: .es for Spain, .com for global use, .ar for Argentina, among others.

Importance of having a domain

Having a domain is important, among others, for the following reasons:

  • Build trust and credibility: It offers a more serious professional image, avoiding including the names of a free provider in the domain.
  • Independence from any provider: If a website has its own domain, it can be changed server without losing that address. On the contrary, if it is hosted on a foreign domain, usually free, it cannot be taken to another server without changing the address. If the domain is not your own, you do not have any rights or control over it. For example:
  • Personalized emails: The email can be personalized by having its own domain. For example: [email protected]

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