Intranets typically start by Publishing Web Pages about Company events, health and safety policies and staff newsletters. Popular applications follow such as forms to reclaim expenses or request holidays. All these help eliminate paperwork and speed up workflows.
As more Features are added,an intranet can become essential to the operation of an organisation. It becomes a portal that provides access to all the things workers need.
The intranet is protected from the global internet by firewalls and by the need to log on with a secure password. Staff working outside the organisation may be able to access the intranet by using a VPN(virtual private network). This means all communications between the intranet and the user’s personal computer are encrypted.
Extranets take this process a step further,by providing access to people who work for different organisations.
An extranet should be more efficient because everyone has access to the same data in the same format. because all extranet communications can be encrypted over a VPN , it should also be more secure than sending data over the Public Internet.