Internet, Intranet and Extranet (original) (raw)

Last Updated : 23 Sep, 2025

A network facilitates the sharing, transmission, and management of information. Among the various types of networks, the three most common are the Internet, Intranet, and Extranet, each designed to support distinct communication and collaboration requirements - from global connectivity to controlled organizational information exchange

Internet

The Internet is the world’s largest public network, connecting millions of computers, devices, and servers across the globe. It has no single owner and functions through cooperation between Internet Service Providers (ISPs), organizations, and network infrastructures.

intranet

Internet

Features of Internet

**Accessibility: Open to everyone with a network connection.
**Availability: Global reach with billions of users worldwide.
**Purpose: Facilitates communication, information sharing, e - commerce, research, social networking, and online collaboration.
**Security: Dependent on user - side protections such as antivirus, firewalls, and encryption.

**Example: Browsing websites like Google, Facebook, or Wikipedia.

Intranet

An Intranet is a private network designed for internal use within an organization. It leverages the same technologies as the Internet (TCP/IP, HTTP, web browsers) but restricts access only to authorized employees.

intranet

Intranet

Features of Intranet

**Accessibility: Only available within an organization.
**Availability: Restricted to company employees.
**Purpose: Supports communication, collaboration, and resource management. Often includes tools like internal news portals, project management software, and HR systems.
**Security: Protected by firewalls and organizational access policies.

**Example: Wipro using an internal network for managing projects, HR databases, and employee portals.

An Extranet is a controlled extension of an Intranet that allows external stakeholders such as suppliers, clients, or business partners to access certain internal resources. It combines the security of an Intranet with the connectivity of the Internet.

ipsec_tunnel

Extranet

**Accessibility: Restricted to both employees and authorized external members.
**Availability: Extends organizational access to vendors, partners, or customers.
**Purpose: Enhances collaboration with external entities while maintaining security.
**Security: Enforced through firewalls, encryption, and login authentication.

**Example: Dell and Intel collaborating through a secure extranet to manage supply chain operations.

**Difference between Internet, Intranet and Extranet

**Point of Difference	**Internet	**Intranet	**Extranet
**Accessibility	Public – open to all	Private – only employees	Private – employees + authorized external users
**Coverage	Worldwide	Within an organization	Organization + selected partners/clients
**Purpose	Global information sharing	Internal communication & collaboration	Secure collaboration with external stakeholders
**Security	User - dependent; less controlled	Protected by organizational firewalls	Firewalls + encryption + controlled login
**Ownership	No single owner	Single organization	Single or multiple organizations
**Users	General public	Employees of the organization	Employees + suppliers/partners/clients
**Maintenance	Maintained by ISPs and global organizations	Maintained by the organization’s IT team	Maintained jointly by the organization and external partners
**Example	Public web browsing	Wipro’s internal HR portal	Dell–Intel supplier network