Intranet is a computer-based network protocol, TCP / IP, such as the internet, it is only used in internal company / office, with a web-based application and data communication technology such as internet

If a body of business / business / institutions expose some of the internal network to the outside community, then this is called the Ekstranet.

Inter-intranet can communicate with each other with each other through the Internet connection that provides the backbone communication distance jauh.Akan but actually does not need an intranet connection to the outside Internet to function as benar.Intranet using all TCP / IP and application so that we have " private "Internet.

And put through a router firewall, agency business / company can block access to intranet.Firewall is a software / hardware to manage access to someone in the user access to intranet or in the local network to the outside network.