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Difference between Internet, Intranet and Extranet

Last Updated : 23 Jul, 2025
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Networks are crucial in today’s globalized world because they allow the acquisition, exchange, and organization of knowledge. Of all the first order networks the Internet, Intranet, and Extranet are commonly utilized for various applications. Every network type meets specific roles that are required in connecting the global population, and internal organization, and secure communication with external subjects. About these networks, this article will aim at identifying their fundamental and specific applications.

What is the Internet?

The Internet is a huge network of millions of computers and related devices from all corners of the globe through which users are able to communicate, exchange information, and partake in general resources. Its mechanism is more decentralized and does not have a specific owner; it works only as a common idea shared by various institutions, governments, and users. The Internet is the tool that links people, companies, and organizations, offering various opportunities for cooperation and development, as well as offering various possibilities to find the necessary information, using Internet resources, such as websites and services, research data, and social networks.

What is an Intranet?

An Intranet is a local area network that has been designed for use within an organization by its employees to share information as well as work together. An Intranet is also constructed from the technologies of the Internet from TCP/IP, HTTP, and web browsers but exist behind a security firewall and has only a limited number of authorized users. Its use is to enhance the cooperation internally, control the distribution of facilities and to work more effectively. These include company news that include the latest updates posted internally to and including personnel directories, project management applications and access to databases all of which assist the organization in enhancing its efficiency.

What is Extranet ?

An Extranet is an extended form of an Intranet that enables secure communication and collaboration between an organization and external entities, such as suppliers, partners, or clients. While it uses Internet protocols to facilitate connectivity, an Extranet is controlled and accessible only to authorized users with login credentials. The primary purpose of an Extranet is to extend the reach of internal resources to trusted external users while maintaining security through firewalls, encryption, and access control measures.

Difference between Internet, Intranet and Extranet

Point of differenceInternetIntranetExtranet
Accessibility of networkPublicPrivatePrivate
AvailabilityGlobal system.Specific to an organization.To share information with suppliers and vendors it makes the use of public network.
CoverageAll over the world.Restricted area upto an organization.Restricted area upto an organization and some of its stakeholders or so.
Accessibility of contentIt is accessible to everyone connected.It is accessible only to the members of organization.Accessible only to the members of organization and external members with logins.
No. of computers connectedIt is largest in number of connected devices.The minimal number of devices are connected.The connected devices are more comparable with Intranet.
OwnerNo one.Single organization.Single/ Multiple organization.
Purpose of the networkIt's purpose is to share information throughout the world.It's purpose is to share information throughout the organization.It's purpose is to share information between members and external, members.
SecurityIt is dependent on the user of the device connected to network.It is enforced via firewall.It is enforced via firewall that separates internet and extranet.
UsersGeneral public.Employees of the organization.Employees of the organization which are connected.
Policies behind setupThere is no hard and fast rule for policies.Policies of the organization are imposed.Policies of the organization are imposed.
MaintenanceIt is maintained by ISP.It is maintained by CIO. HR or communication department of an organization.It is maintained by CIO. HR or communication department of an organization.
EconomicalIt is more economical to use.It is less economical.It is also less economical.
RelationIt is the network of networks.It is derived from Internet.It is derived from Intranet.
ExampleWhat we are normally using is internet.WIPRO using internal network for its business operations.DELL and Intel using network for its business operations.

Conclusion

It is essential to distinguish the terms Internet, Intranet, and Extranet for any individual or an organization that is in need of any sort of networking. Today, millions of Internet users send messages and share information and ideas through the Internet all over the globe. While intranets are the internal connection within an organization used for internal operation. An Extranet is used when two or more organizations require a connection or to link a business with its employees, vendors, and clients, and hence comes in between the Intranet and Internet. All these networks are important in today’s connectivity environment as they perform important role in the conduct of various functions.


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