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| Internet | Intranet | Extranet |
Internet
Internet is a clustered system of interrelated computer networks that uses a standard Internet protocol (IP) or transmission control protocol (TCP) network. It is a global network of millions of private, public and organizational network. It carries a massive range of informational resources and data in the form of HTTP (Hypertext Markup language) documents and applications through the World Wide Web (WWW). Common functions of sharing are email, file sharing,
telephony, and p2p networks. The Internet has totally reshaped entire professions of the world. TV channels, cellular companies, newspapers, books, retailers are using website technology to expend their services. It was conceived by the Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 and was first known as the ARPANet. The original aim was to create a
network that would allow users of a research computer at one university to "talk to" research computers at other universities. In India, August 15,1995 VSNL formally launched the Internet for the India public. The most widely used part of the Internet is the World Wide Web (often abbreviated "WWW" or called "the Web"). Its outstanding feature is hypertext, a method of instant cross-referencing. In most Web sites, certain words or phrases appear in the text of a different color than the rest; often this text is also underlined. When you select one of these words or phrases, you will be transferred to the site or page that is relevant to this word or phrase. Sometimes there are buttons, images, or portions of images that are "clickable." If we move the pointer over a spot on a Web site and the pointer changes into a hand, this indicates that we can click and be transferred to another site. Using the Web, we have access to billions of pages of information. Web browsing is done with a Web browser, the most popular of which are Chrome, Firefox and Internet Explorer.
Intranet
Intranet is a computer network system in which a specific organizational systems share information, computing services and operational systems with each other by using an Internet (IP) technology. This term basically refers to the network of a specific organization. You can also says it a private network. Authenticated users of the organization can access the database system, search engines, directory and can distribute documents and workflow. Employees can make interactive communication in shape of chatting, audio and videoconferencing, groupware and teleconferencing. The benefits of Intranet is that low development and maintenance cost arises on this setup. It is also a means of friendly environment and speedily sharing of secret information on time. It is also the type of internet that is restricted to the internal environment of an organisation only. The internal IT system of an organisation is the best example of the intranet. In that’s way, the intranet has very limited functionalities in term of the geographical area. The company where intranet is being used on its own creates the main point for internal communication and collaboration system that can be accessed by the authorized persons only. It
although utilizes the technologies of wide area networks and local area networks but still the employees of an organisation remain its only users. Intranet started to grow across the world after the internet when some large organisations started to develop their own internal internet system that was later on named as an intranet. The main aim of the intranet is to ensure the secure collaboration, communication and team working in any organisation. Unlike the internet
that is maintained by the autonomous network providers, the intranet is managed and maintained by the HR or communication department of an organisation. According to the research of the Intranet Design Annual, the users of the intranet are gradually increasing as it provides the more security and privacy to the large enterprises as compared to the open public internet.
Extranet
The term Extranet is linked with Intranet. Extranet is a kind of computer network that allows the outside users to access the Intranet of organization. This network system is basically used for business to business (B2B) purposes. This system basically allows the outside users of an organization, like partners, suppliers, vendors and other stakeholders to remain in touch with the
activities of organization. Information and data access performed through a proper account or link system. This is a best network system to keep in touch with market position and share a large amount of data to partners in a timely manner. Moreover, conducting new training programs and discussing the products catalogs with partners can be easily done without bearing
too much cost of travelling. Extranet is the next stage in the intranet. It has also very restricted users but as compared to intranet it has a more opened environment. When the usage of the internet remains restricted to the internal environment of an organisation only it is called as intranet but when the customers and other outsiders like the stakeholders of an organisation also
join this system then this system becomes the extranet. The users in case of extranet also remain very limited but in this system, there remains the some involvement of the outsiders that are directly connected with any business. After setting the extranet, the users can then send private messages by using the public network system through the most enhanced encryption and security
technologies. The information in all way is accessible through the intranet of an organization. If intranet is derivate from the internet then extranet is derivate from the intranet. At first, this term was used as a channel of communication between two organisations only. After that authorized vendors and suppliers started to join this system after their permission of the respective
organizations. It has its own data transfer system named Electronic Data Interchange (EDI) that provides the system of exchanging the large volume of data.
Key Differences
First difference between all is a matter of availability. Internet is a global network system and is available to all while Intranet and Extranet are available to limited inside and outside users of the organization.
Intranet and Extranet are more secure than Internet because having Intranet or Extranet network system means organization has created a firewall against outsiders. Accessing any information on Internet is not much difficult today.
General public is the user of Internet so it can be called as public network while business persons and organization are the users of Intranet and Extranet and can be called as private networks.
Internet can be access through without having user account. While user account is the first important condition in case of Intranet and Extranet.
Internet has no hard and fast policies while there is a complete organization policy behind the setup of Intranet and Extranet.
Both intranet and extranet or more secure as compared to the internet because these are based according to the policies of the organisations. The business of their own decided to grant access to the others in case of intranet and extranet.
The business and organisations are the only users of intranet and extranet while the internet is the global communication system.
The Internet is managed by the autonomous networks while extranet and intranet are managed and maintained by the HR or communication department of an organization.
The Internet is economical as compared to the intranet and extranet because these two requires special set up the cost. Both of this required special software, hardware and employees training cost to be familiar with the special IT environment.
If intranet is derivate from the internet then extranet is derivate from the intranet.
The Internet works as a channel of communication and collaboration in the internal environment of an organisation only while extranet work as a channel of communication and collaboration in both internal and external environment of an organization.
An intranet is more secure as compared to internet and extranet because both of these involve the more number of users.
Both intranet and extranet depend on the internet.
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