An intranet is an internal company network that uses internet standards like HTML and TCP/IP. It is only accessible to authorized employees and members. It provides collaboration and communication to employees through a client/server environment on a local area network. Two levels of security are required - internal through encryption keys and external through firewalls. Firewalls regulate access in and out of the network based on rules. Intranets are cost-effective for distributing information throughout an organization and linking employees around the clock. They improve communication and access to internal knowledge.