What is a Domain?

Map Of Internet 1973


The term domain is just the equivalent short name for a DNS name (ie Domain name).

For more information, check the dedicated page: What is a Domain Name in DNS ?

Usage Example

This examples show how the domain name is used to define a host resource.


The Hostname is a domain name that identifies a host.

Example: host.example.com is a domain name

Email address

In the email address label@name, the domain name is the part after the arobase.

The domain portion identifies the point (node) to which the mail should be delivered:


In a url: https://host/path?query#fragment, the domain name is the host part that identifies a HTTP server.

Discover More
Cookieless domain

A is a domain which does not set cookies intended to host static website. If your domain is www.example.org, you can host your static components on static.example.org. However, if you've already...
Cross Site / Cross Domain Request

A request is: same-site if its target's URI's origin's registrable domain is an exact match for the request's initiator's (the parent), and cross-site otherwise. A cross site request is also known...
Map Of Internet 1973
DNS Database

The DNS database is the DNS repository that contains all DNS record of a domain The domain provider should have a graphical interface to modify records but at the end, this record are stored in a text...
Domain Validate Certificate
Domain Validated Certificates (DV)

Domain Validated certificates are server signed certificates where the ownership of the domain was checked. There is no identifying organizational information for these certificates and thus should never...
Email - Blacklist

A blacklist is a list of email or ip that are not trusted and should be blocked
Map Of Internet 1973
Network - Fully Qualified Domain Name (FQDN)

FQDN stands for fully qualified domain name. It's a name that is said to be absolute (ie that includes the local domain and ends with a dot). This name identifies uniquely a node in the namespace....
SEO Metrics - Domain Authority

domain authority is a ranking score developed by the SEO software company Moz that try to predicts the rank on search engine results pages (SERP) of a domain. Domain authority ranges from a score of 1...
Google Search Console Links
Search Engine - Backlink (Internal / External Link)

A backlink is a link that points to a page. Technically, it means that the href attribute of the link has the same value than the url of the page. backlinks are important for search engine optimization...
Dkim Entry
What is DKIM, the Email DomainKeys Identified Mail? (Mail Signatures)

DomainKeys Identified Mail (DKIM) is a method to sign digitally outgoing email, in order to authenticate a person, role, or organization allowing them to claim some responsibility for the message. The...
What is Hosting? (or hosted domains for HTTP, Email, )

Hosting is when the domains of a request are not directly associated with the machine's name. The domains are then called hosted. web hosting is when a web/http server is provided to you. You...

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