TOPIC 10: DATA COMMUNICATION AND NETWORKING. Sub-topic 10.3: Intranet, Extranet and Internet


INTRANET, EXTRANET & INTERNET

Intranet refers to a connection of private computer networks within an organization.

Intranet refers to a connection of private computer networks within an organization.

An intranet has tools to facilitate communication between organization’s employees or workgroups to improve the knowledge and data sharing capability.

Many schools and non-profit groups have deployed intranets. A simple intranet consists of an internal email system.

More complicated intranets include Web sites and databases containing company news, forms, and personnel information.

Advantages of Installing an Intranet

Sharing resources such as laser printers, fax machines, modems, scanners, etc. is simplified

Electronic Mail: Electronic mail on a LAN can enable students to communicate with teachers and peers at their own school.

Flexible Access: School networks allow students to access their files from computers throughout the school. Students can also work cooperatively through the network.

Disadvantages of Installing a School Network

  • Expensive to Install. Although a network will generally save money over time, the initial costs of installation can be prohibitive.
  • Requires Administrative Time. Proper maintenance of a network requires considerable time and expertise.
  • Must Monitor Security Issues. Wireless networks are becoming increasingly common; however, security can be an issue with wireless networks

Extranet is a computer network that allows controlled access from the outside for specific business or educational purposes. Extranets are extensions to, or segments of, private intranet networks that have been built in many corporations for information sharing.

An extranet is a computer network that allows controlled access from the outside for specific business or educational purposes.

Extranets are extensions to, or segments of, private intranet networks that have been built in many corporations for information sharing.

Most extranets use the internet as the entry point for outsiders, a firewall configuration to limit access and a secure protocol for authenticating users

Advantages of 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.
  • Share news of common interest exclusively

Disadvantages of extranet

  • Extranets can be expensive to implement and maintain within an organization (e.g., hardware, software, employee training costs)
  • Security of extranets can be a concern when hosting valuable or proprietary information.

The internet is a global connection of computer networks. The internet links together millions of computers, to exchange and share information all over the world.

Benefits of installing an intranet in a school

  • Facilitates internal emails
  • Provides access to company contacts information, procedure manual and other frequently updated documents
  • Used for posting and updating employee forms
  • Posting internal job listings
  • Provides electronic catalogs for ordering supplies
  • Facilitates collaborative computing
  • Scheduling meeting and appointments.
  • Posting financial statements and other types of corporate information
  • Maintains shared calendars, projects timelines and other project documents
  • Provides access to company databases and other systems
  • For monitoring internal security.

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