2. Intranet and Extranet An " intranet " is the generic term for a collection of private computer networks within an organization. An " extranet " is a computer network that allows controlled access from the outside for specific business or educational purposes. Intranets and extranets are communication tools designed to enable easy information sharing within workgroups.

3. Intranet

4. Extranet

6. Public Network

8. Private Network

10. Leased Line