Internet, Intranet & Extranet

Just got a question from a relative where he asked what the difference was between the Internet, Intranet & Extranet. Thought it was worth sharing this information as it could be of use for someone else!



Service and connection made possible by a large infrastructure of routers, switches cables and servers and carry a wide variety of services like the World Wide Web (WWW), File Transfer Protocol (FTP), Voice over IP (VoIP) and much more.

The internet is not the world wide web, but they are not the same thing. The World wide web is just a service that’s running as a service on the internet.


Privately accessible infrastructure of routers, switches, cables and servers. It is usually limited to a single organisation or a group of companies (managed by one single entity). Even though the functionality is often only offered for internal use, it still can carry a variety of services. An example is a mailserver, DHCP or DNS server, etc.


The extranet is a privately held infrastructure often owned (and most of the times managed) by a single company or organisation. It’s common that the owner of the Extranet will charge their users for the use of the Extranet. Just like the internet and intranet it can offer a wide variety of services who are also offered by the internet or intranet. The best example for the extranet is Amazon Web Services (AWS), Microsoft Azure (MA) or any other datacenter offering webspace or virtual machines.

It’s been a while since I created or added information to my website. As I am currently focussing on training myself there is a pretty big chance I will also share my notes and knowledge I gathered here on the internet. If you would like to see a specific article or topic covered, please do not hesitate to contact me down below in the comment section!