Subdomain explained


In the Domain Name System (DNS) hierarchy, a subdomain is a domain that is part of a larger domain. For example, "example.com" is a subdomain of the "com" top-level domain (TLD) while "www.example.com" is a service in the domain "example.com". In fact, the "com" TLD is a subdomain of the root domain, ".". The comparison with a disk drive containing files and folders is quite strong... something is a subdomain if it could be equated to a folder, and a record within that subdomain equates to a file.

Relative to a subdomain, the larger domain that it is a part of is its parent domain, or alternately superdomain (the former term appears to be preferred by the IETF).

A subdomain is sometimes termed a vanity domain, especially when it is a subdomain of an ISP's own domain aliased to an individual user account. However, the term "vanity domain" has other usages, discussed at that article.

Some websites use a different Host name to point to different servers in a clusters. For example, www.example.com points to Server Cluster 1 or Datacentre 1, and www2.example.com points to Server Cluster 2 or Datacentre 2, etc.

Subdomains are commonly used by organizations that wish to assign a unique name to a particular department, function, or service related to the organization. For example, a university might assign "cs" to the computer science department, such that a number of hosts could be used inside that subdomain, such as mail.cs.example.edu or www.cs.example.edu.

Depending on application, a record inside a domain, or subdomain might refer to a Host name, or a service provided by a number of machines in a cluster.

Most hosting companies offer unlimited subdomains nowadays, however, if you are beginner and using a subdomain can be your start, consider looking to best free web hosting company, which offers such feature.


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ipvanish.com Icon 🏆 Alexa 32,275 - 📅 - Is WWW2 Safe? An Intro to Subdomains - Uncover the significance of 'WW2' in URLs and its impact on web safety. Learn what numeric suffixes reveal about websites and how to navigate them securely. The post Is WWW2 Safe? An Intro to Subdomains first appeared on IPVanish.
clickssl.net Icon 🏆 Alexa 314,289 - 📅 - Best Cheap Wildcard SSL Certificate Providers in 2024 - Are you looking for a Wildcard SSL certificate to protect your sub-domain website? ClickSSL offers a cheap Wildcard SSL certificate from globally trusted Certificate Authorities. PositiveSSL Wildcard $ per year Cheapest Price Unlimited Subdomains ...
clickssl.net Icon 🏆 Alexa 314,289 - 📅 - What is Wildcard SSL Certificate and How Does Wildcard Certificate Works? - A wildcard SSL certificate is best for subdomain security. If you have a website that has multiple subdomains, then this Wildcard Certificate Overview article is for you. What is Wildcard SSL certificate? Wildcard SSL certificate works on asterisk ...
aspgulf.com Icon 🏆 Alexa 5,218,128 - 📅 - Multi-Level Wildcard SSL - An Exhaustive Guide to Multi-Level Wildcard SSL: Securing Your Subdomains with Ease In today's digital ecosystem, where data security is paramount, SSL certificates have become a staple for businesses, especially for those that operate on multiple ...
natsav.com Icon 🏆 Alexa 683,105 - 📅 - How to Install a Wildcard SSL Certificate on Multiple Servers - Installing a wildcard SSL certificate on multiple servers involves several steps, including generating the certificate and key pair, distributing the certificate files to each server, and configuring the web server software. What is a Wildcard SSL ...
clickssl.net Icon 🏆 Alexa 314,289 - 📅 - What Are The Types of SSL Certificates? - There are 3 types of SSL certificates, which are different by validation (OV, DV, and EV) and by a number of domains or subdomains. You need an SSL certificate to gain your visitors’ trust, enhance your website security and boost top ranks in search
cyberdeveloperbd.com Icon 🏆 Alexa 534,303 - 📅 - How to create subdomain and redirect? - ♦ First login to cPanel with username and password? ♦ Now i click Domains button from Domains. ♦ Now I click on Create A New Domain to create sub-domain. ♦ Now click on the submit button with the domain name (jony) and then the main domain name ...

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