This document provides an overview of intranets, extranets, and firewalls. It defines an intranet as a privately maintained internal network only accessible to authorized users like employees. An extranet is described as a partially private network that uses internet technology to securely share some business information with suppliers, vendors or partners. Firewalls are defined as network security systems that control incoming and outgoing traffic based on rules to protect internal networks. The document gives examples of how companies can use extranets for activities like exchanging data, sharing catalogs, collaborating on projects, and providing access to shared services.

1. INTRODUCTION TO
INTERNET & OTHER
EMERGING TECHNOLOGY
INFORMATION TECHNOLOGY

2. INTRANET & EXTRANET
Intranet is defined as a
privately maintained
computer network that can be
accessed only by authorized
persons, especially members
or employees of the
organization that owns it.
Extranet is a private network
that uses internet technology
and a public
telecommunication system to
securely share part of a
business’s information or
operations with suppliers,
venders, partners, customers,
or other businesses.

3. INTRANET & EXTRANET

4. INTRANET
 Privately maintained computer network
 Accessed only by authorized persons
 Within enterprise consisting of many interlinked local area
networks
 Intranet website look & act just like any other web sites
 The firewall surrounding an intranet restrict unauthorized
access
 Main purpose: share company information & computing
resources among employees
 Ex. Teleconference.

5. EXTRANET
 Privately network that uses Internet Technology & public
telecommunication system
 Part of company’s intranet that is extended to users outside the
company, without granting access to the organization's entire
network
 Private part of a website
 It is restricted to select users through user IDs, passwords and
other authentication mechanisms on login page
 Extranet requires security and privacy like firewall
 Ex. Educational institution site

6. In computing, a firewall is a network security system that controls the incoming and
outgoing network traffic based on applied rule set. A firewall establishes a barrier between
a trusted, secure internal network and another network (e.g., the Internet) that is assumed
not to be secure and trusted.
FIREWALL

7. COMPANIES CAN USE
EXTRANET TO
Disadvantages:
a) Very expensive
implementation &
maintenance
b) Potential for
compromise of
sensitive &
proprietary
information
 Exchange large volumes of data using EDI.
 Share product catalogs exclusively with
wholesalers
 Collaborate with other companies on joint
development efforts
 Jointly develop & use training programs with
other companies
 Provide or access services provided by one
company to a group of other companies, s. a.
online banking
 Share news of common interest exclusively with
partner companies

8. Thank You!
-By Arti Gavas