Intranet Development

An Intranet is a private network inside a company or organization.   The main purpose of an intranet is to share company information and computing resources among employees.  An intranet can also be used to facilitate working in groups and for teleconferences.

It may consist of many interlinked local area networks and also use leased lines in the Wide Area Network. Typically, an intranet includes connections through one or more gateway computers (a gateway is a network point that acts as an entrance to another network) to the outside Internet.

An intranet uses TCP/IP, HTTP, and other Internet protocols and in general looks like a private version of the Internet. With "tunneling", companies can send private messages through the public network, using the public network with special encryption/decryption and other security safeguards to connect one part of their intranet to another.

Typically, larger organizations or enterprises allow users within their intranet to access the public Internet through firewall servers that have the ability to screen messages in both directions so that company security is maintained.  A firewall is a set of related programs located at a network gateway server to protect the resources of a private network from users from other networks. The term also implies the security policy that is used with the programs.  When part of an intranet is made accessible to customers, partners, suppliers, or others outside the company, that part becomes part of an extranet.

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