These three terms are common in some workplaces, but do you know what they really mean?
In this post we will detail the terms of Internet, Intranet and Extranet so that you know more about, how they work and the benefits. Come on?


Internet you should already know what it is, even because you are browsing it now while reading this post. Do you know how it came about?
Although wars brought destruction and innumerable harms, technological innovations also emerged, such as the Internet, which emerged in the midst of the Cold War in the late 1960s.
Under the name of Arpanet, it emerged in the US Department of Defense to maintain and preserve communication between military and scientists, even if a nuclear attack occurred.
After that, Arpanet expanded into the academic environment, allowing data transmission between universities quickly and securely. For almost two decades, only academic and scientific circles have had access to this network.
Here in Brazil the internet began to be used in the late 1980s in the National Laboratory of Scientific Computing. Starting in 1992, several companies began to emerge as providers of Internet access. It was in that same year that a European laboratory (CERN) gave origin to WWW, World Wide Web used to make available information for any Internet user.
Definition of internet: A cluster of local networks spread around the world, interconnecting computers to use the internet protocol. The internet is today one of the best ways to do research, with quick and easy access, promoting a great capacity of assimilation of search.
Today serves as one of the main means of communication. It allows to transmit data, such as photos, videos, texts, among other resources, even at a great distance, increasing the number of its users every day.


Today, companies are looking for tools and methods to align internal communication, reduce costs, and centralize information and files. The intranet is one of those tools, which works in a way restricted to a certain audience, such as a company. In this way, employees can access it with their specific user and password.
The intranet is then a closed and internal network, and still enables the use of more communication protocols, in addition to HTTP. Intranet access is usually done on a local server and a local network, which we call LAN, which means Local Area Network (LAN) installed in the company itself.
This internal network connects users, allowing information exchange, file and document management, centralizing communication between users. With this tool, it is possible to link companies and departments quickly, safely and efficiently.


An extranet functions as a shared network, disseminating information present on the intranet. That is, if a private intranet shares some of its content with other users (be they suppliers, clients, etc.), that shared network is what we call the extranet.
In addition, it is possible to concentrate a knowledge base for all audiences who have access to that network.
Here's a comparison between the three technologies: