1.9.Internet, Intranet, and Extranet
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If you wish to expose information to everyone in the world, then you would build an Internet-type application.
An Internet-type application uses Internet protocols such as HTTP, FTP, or SMTP and is available to persons anywhere on the Internet.
We use the Internet and web applications as ways to extend who the application can reach.
The information on a company’s intranet would not be accessible to persons on the Internet because it is not for public use.
From time to time, an application that has been built for the company’s intranet and used by internal employees will need to be extended to select business partners or customers.
If you extend your intranet out to select business partners or customers, you have created an extranet.
A extranet cannot be used by anyone else external to the company except for those selected individuals.
