What is intranet Features Architecture Merits applications What is Extranet Components Structure Advantages Disadvantages Layered system view Relationship between intranet & Extranet

An intranet is a computer network that uses Internet Protocol technology to share information, operational systems, or computing services within an organization.

An intranet delivers collaboration and coordination to employees around the clock◦ Communication system designed by technical staff◦ Focus is the message, not the media

Normally runs in a client/server environment and a local area network configuration

Separated from other networks by firewalls, a means of preventing unauthorized access to the company’s internal data or leaks of sensitive company information

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Integration Security Collaboration Communication Channels Automation User Friendly Remote Access

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Public/ExternalInternet Users

Intranet

Clients

server

Email servers

web serversFirewalls

databases

Workforce productivity Time Communication Web publishing Business operations and management Cost-effective Workforce productivity Time Communication Web publishing

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Sharing of company policies/rules & regulations Sharing of information of common interest Access product & customer data Launching of personal/departmental home pages Submission of reports Corporate telephone directories

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An extranet is a computer network that allows controlled access from the outside, for specific business or educational purposes. In a business-to-business context, an extranet can be viewed as an extension of an organization's intranet that is extended to users outside the organization, usually partners, vendors, and suppliers, in isolation from all other Internet users.

Extranet is an Intranet for outside authorized users using same internet technology.

Inter-organizational information system.enable outsiders to work together with company’s employees.

open to selected suppliers, customers & other business partners Go back

Extranets first appeared within a year of the creation of Intranets, around 1995. Like Intranets, early Extranets were initially available only to large corporations, which used the technology to provide customers and suppliers with access to the company's network. Libraries soon adopted the technology. The first states to use library Extranets included Alaska, Colorado, Oregon, Rhode Island and Utah.Go back

Some basic infrastructure components such as the internet Including :- TCP/IP protocols E-mail Web-browsers External business partners &Tele-commuting employees place order, check status & send E-mail.

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Suppliers

distributers

customers

VPN

VPN

VPN

Tunneling Internet

Firewall

FirewallFirewall

Intranet

Intranet

Extranet

Exchange large volumes of data using Electronic Data Interchange (EDI)

Share product catalogs exclusively with trade partners

Collaborate with other companies on joint development efforts

Jointly develop and use training programs with other companies

Provide or access services provided by one company to a group of other companies, such as an online banking application managed by one company on behalf of affiliated banks

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Extranets can be expensive to implement and maintain within an organization (e.g., hardware, software, employee training costs), if hosted internally rather than by an application service provider.

Security of extranets can be a concern when hosting valuable or proprietary information.

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Clients, partners, customers

Intranet

Extranet

Internet

Corporate members

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An extranet could be understood as an intranet mapped onto the public Internet or some other transmission system not accessible to the general public, but managed by more than one company's administrator(s). For example, military networks of different security levels may map onto a common military radio transmission system that never connects to the Internet. Similarly, for smaller, geographically united organizations, "extranet" is a useful term to describe selective access to intranet systems granted to suppliers, customers, or other companies. Such access does not involve tunneling, but rather simply an authentication mechanism to a web server. In this sense, an "extranet" designates the "private part" of a website, where "registered users" can navigate, enabled by authentication mechanisms on a "login page".

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