Organizational Internets

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Organizations apply different types of technology to connect their own employees and to connect to other organizations:

Intranets - private network within an organization that resembles the Internet.
- Uses browsers, web sites and web pages
- Typically provide e-mail, mailing lists, newsgroups, and FTP services.
- Services are accessible only to those within the organization.
Extranets - private network that connects more than one organization.
- May allow other organizations limited access to their network.
- Purpose is to increase efficiency and reduce costs.
Firewalls - a security system designed to protect an organization's network against external threats.
- Consists of hardware and software that control access to a company's intranet or other internal networks.
- Includes a special computer called proxy server.
- All communications between the company's internal networks and the outside world must pass through this special computer.
- The proxy server decides whether to allow a particular message or file to pass through.

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