When discussing who owns the Internet, some people may argue that an individual can actually own a part of the internet, called an “Intranet”.
In contrast to the Internet, where the network connection is open to the ‘general public’, Intranets and Extranets are classified as networks on which access is restricted to a closed group or collection of groups.
Gallo and Hancock (1) state that an Intranet is “The internal network implementation of traditional Internet applications within a company or an institution”. According to Irving (2) “The name ‘Intranet’ is sometimes used to describe an ‘internal’ internet based upon files that are open to users of the company’s LAN”.
In comparison, according to Irving (2), an extranet is essentially an institution’s “intranet shared among an organisations suppliers”, known as a business-to-business solution.
In addition, according to Wikipedia (3), “An intranet is a private computer network that uses Internet protocols and network connectivity to securely share part of an organization's information or operations with its employees.”
Furthermore intranets use the same concepts and technologies of the Internet such as clients and servers running on the Internet protocol suite are used to build an intranet. HTTP and other Internet protocols are commonly used as well, such as FTP.
Some functions and applications that can be used over the internet can also be used over the intranet including, web servers, email, file sharing, instant messaging and newsgroups.
An example of an intranet site is a Local Authority’s council portal for employees. Here employees can go to the council’s website and then access a private area through a secure URL that isn’t advertised. Through authentication, employees are then allowed access to internal data and other information.
Bibliography
(1) Gallo, M., and Hancock, W. Networking Explained. Woburn, Digital Press. 1999.
(2) Irving, P. Computer Networks. Exeter, Learning Matters Ltd. 2003.
(3) Wikipedia (online) (cited 15 January 2007) http://en.wikipedia.org/wiki/Main_Page