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Describe the differences between the Internet, an intranet, and an extranet
he three types of enterprise network infrastructures, namely the Internet, intranet, and extranet. We also look at the differences between them in their various applications. Network Categories As far as business network infrastructure is concerned, there are three broad categories of networks, namely the Internet, intranet, and extranet. These networks use various network protocols (i.e. TCP/IP) and topologies to allow for communication between computers and other network devices such as printers and VOIP systems. In this article we will take a look at the differences between: intranets and the Internet, intranets and extranets, and the Internet and extranets.
Depending on the needs of an organization, a network may span a geographical divide or allow for interconnection between persons and devices within the same building. In this day and age, this interconnectivity is a matter of great importance because it facilitates the efficient running of an organization or helps it to maintain a competitive edge.
- Internet Internet means global network. The Internet is a global system of interconnected computer networks. It is not controlled by a central entity and therefore relies on network devices and accepted conventions and protocols to relay the data traffic until it gets to its destinations. Some countries have imposed rules to censor or otherwise control what kind of content is accessible by its citizen (i.e. China). The Internet zone is for letting you surf the web. If you go on a bad site, it will be harder to attack them than with Intranet on. However, except for the management of Internet Protocol addresses and the Domain Name System by ICANN (the Internet Corporation for Assigned Names and Numbers), the Internet remains unregulated and uncensored. The beginnings of the Internet can be traced back to the 1960s when the United States funded research by its military agencies to develop a fault-tolerant and robust distributed network of computers. The Internet is now
global and in theory can be accessed by anyone who can get access from an Internet service provider.
- Intranet Intranet means a single organization where share information can be accessed through a organization. On the other hand, an intranet is a private network that is setup and controlled by an organization to encourage interaction among its members, to improve efficiency and to share information, among other things. Intranet is used for things that are probably more secure than the Internet. For example, those .mht archives on your desktop are probably more secure than .com. Therefore, your .mht archives are given higher privileges (depending on your internet settings) to doing stuff. Another example would be other computers on the network, if you're in a company. Anything transmitted to you by a coworker might be more trustworthy (at least, to IE*) than .com. Information and resources that are shared on an intranet might include: organizational policies and procedures, announcements, information about new products, and confidential data of strategic
value. An intranet is a restricted-access network that works much like the Internet, but is isolated from it. As is the case with the Internet, an intranet is based on TCP/IP protocols. Therefore, a web page in an intranet may look and act just like any other webpage on the Internet, but access is restricted to authorized persons and devices. In some cases, access to an intranet is restricted by not connecting it to other networks, but in other cases a firewall is used to deny access to unauthorized entities. The difference between an intranet and the Internet is defined in terms of accessibility, size and control. Unless content filters are being used or the government is censoring content, all the Internet’s content is accessible to everyone. On the other hand an intranet is owned and controlled by a single organization that decides which members are allowed access to certain parts of the intranet. In general, an intranet is usually very small and is restricted to the premises of a
- Extranet Extranet means a shared accessed content through a organization and also another organization if they permitted. An extranet is an extra version of intranet. In addition to allowing access to members of an organization, an extranet uses firewalls, access profiles, and privacy protocols to allow access to users from outside the organization. In essence, an extranet is a private network that uses Internet protocols and public networks to securely share resources with customers, suppliers, vendors, partners, or other businesses. Both intranets and extranets are owned, operated and controlled by one organization. However, the difference between intranets and extranets is defined in terms of who has access to the private network and the geographical reach of that network. Intranets allow only members of the organization to access the network, while an extranet allows persons from outside the organization (i.e. business partners and customers) to access
the network. Usually, network access is managed through the administration of usernames and passwords, which are also used to determine which parts of the extranet a particular user can access.
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