Learning Objectives
By the end of this chapter, you will be able to:
- Define Intranet and Extranet.
- Differentiate between the Internet, Intranets, and Extranets.
- Understand the business applications for these private networks.
Intranet
An Intranet is a private network contained within an enterprise that is used to securely share company information and computing resources among employees.
An intranet works exactly like the public Internet (using TCP/IP protocols, web browsers, and web servers), but it is protected from unauthorized access by a firewall.
Uses of an Intranet
- Internal Communication: Employee directories, company news, and internal memos.
- Resource Sharing: HR policies, training materials, and internal software tools.
- Collaboration: Secure document sharing and team workspaces.
Extranet
An Extranet is an intranet that can be partially accessed by authorized outside users. It is a private network that securely shares part of a business’s information or operations with suppliers, vendors, partners, customers, or other businesses.
Uses of an Extranet
- Supply Chain Management: Allowing suppliers to view inventory levels in real-time.
- Customer Portals: Providing clients with secure access to their billing history or project status.
- Partner Collaboration: Sharing joint project documents with external consultants or partner firms.
Comparing the Three
| Feature | Internet | Intranet | Extranet |
|---|---|---|---|
| Access | Public (Anyone) | Private (Employees only) | Private/Shared (Employees + Partners) |
| Security | Low | High (Firewalled) | High (Firewalled + VPN authentication) |
| Information | General, public data | Proprietary company data | Shared business data |
Summary
While the Internet connects the entire world, organizations need secure spaces to operate. Intranets provide a private digital workspace for employees, while Extranets open a secure window into that workspace for trusted external partners, streamlining communication and business operations.
