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The Internet, intranets, and extranets

Intranet and Extranet Features

An intranet is a private network, accessible only to the staff of an organization. Generally a wide range of information and services from the organization's internal IT systems are available that would not be available to the public from the Internet. A company-wide intranet can constitute an important focal point of internal communication and collaboration, and provide a single starting point to access internal and external resources. In its simplest form an intranet is established with the technologies for local area networks (LANs) and wide area networks (WANs).
Intranets began to appear in a range of larger organizations from 1994. The launch of a free webserver from Microsoft in 1996 helped make the technology accessible to a wider market.
Increasingly, intranets are being used to deliver tools, e.g. collaboration (to facilitate working in groups and teleconferencing) or sophisticated corporate directories, sales and customer relationship management tools, project management etc., to advance productivity. Intranets are also being used as corporate culture-change platforms. For example, large numbers of employees discussing key issues in an intranet forum application could lead to new ideas in management, productivity, quality, and other corporate issues. In large intranets, website traffic is often similar to public website traffic and can be better understood by using web metrics software to track overall activity. User surveys also improve intranet website effectiveness. Larger businesses allow users within their intranet to access public internet through firewall servers. They have the ability to screen messages coming and going keeping security intact.


Extranet

An extranet is a website that allows controlled access to partners, vendors and suppliers or an authorized set of customers. An extranet is similar to a DMZ in that it provides access to needed services for authorised parties, without granting access to an organization's entire network.
Historically the term was occasionally also used in the sense of an organisation sharing their internal networks over a VPN
An extranet is a website that allows controlled access to partners, vendors and suppliers or an authorized set of customers. An extranet is similar to a DMZ in that it provides access to needed services for authorized parties, without granting access to an organization's entire network. Historically the term was occasionally also used in the sense of an two organisation sharing their internal networks over a VPN.
In computer security, a DMZ or demilitarized zone (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization's external-facing services to a larger and untrusted network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization's local area network (LAN). An external network node only has direct access to equipment in the DMZ, rather than any other part of the network. The name is derived from the term "demilitarized zone", an area between nation states in which military operation is not permitted.

Intranets reduce training costs
Intranets reduce training costs

Intranets can improve communication
Intranets can improve communication

Businesses also use intranets to increase a sense of community
Businesses also use intranets to increase a sense of community


Businesses use extranets to give certain people acccess to company information
Businesses use extranets to give certain people acccess to company information

Extranets provide a means for businesses to collaborate with other company information
Extranets provide a means for businesses to collaborate with other company information

Businesses use extranets to communicate efficiently and effectively with distributors.
Businesses use extranets to communicate efficiently and effectively with distributors.