E-commerce websites fall into this category and often include specialized functions such as shopping carts, browsable catalogs, password protection, credit card encryption, customer service and support. Other examples of Interactive sites include banking, multimedia and travel agency business sites. Intranet sites work internally within a company, and are not accessible to the public at large. Intranet sites allow employees and other related parties within a company to access, add and exchange data on a secure platform. Intranet websites are preferable to traditional mainframe systems because they allow remote users to access their company's system files from anywhere in the world.
Portal sites connect the user to other related websites on the internet.