Any private network that uses some or all of the protocols of The Internet. Note: In an intranet, nodes interact in a client-server relationship, nodes are identified by using Internet protocol (IP) addresses, and files are identified by universal resource locators (URLs. ) The data being exchanged are typically formatted using the HTML language, and is controlled and displayed using a browser. The intranet may be connected to The Internet via firewalls, or it may be totally separate.