Most of us would have heard these words Internet, Intranet, and Extranet. All of these seems like same but in the actual working of these networks are very different. I will clear all you doubt between these networks.
The Internet is a connection to many other computers that connect any computer in the world through routers and servers. In other words, the internet is the connection between the two computers through TCP / IP protocol in order to exchange information. The Internet is the world’s largest network. We access all web-based service via the Internet. It is less secure as it is a connection to many other computer and hackers can steal your data.
An intranet is a private network which is ideal for big organizations and companies. In this connection of computers are made by using LAN cables and routers. In this, they don’t connect any computer to the Internet. It is only for internal communication or file sharing between the members of that organization. Since there is no use of any external computer or Internet there are no chances for someone to spy on your computer. As a result, this is more secure it is created.
The main purpose of Extranet is to provide some access to Intranet network. An extranet is based on user id and Password to provide some authorized access to Intranet network.
An extranet is useful for providing a specific information to Intranet by authorized access.
So now you know the basic difference between these three networks.