Welingkar’s Distance Learning Division

Intranets & Extranets

We Learn – A Continuous Learning Forum

Intranets & Extranets

Information Technology Structure

Security Content & Data Software Tools

Infrastructure

TCP/IP Hypermedia Servers Browsers

Network Databases

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Management

Policies & standards Network Management Software

An Overview of an Intranet

clients

Pvt. serverFirewall server

Internet router

Firewall serverInternet router

Public Internet

LAN 1

Intranet Site 1

To Intranet

Site 2 LAN 2

Intranets & Extranets

Intranet

Company B

Intranet server

The Intranet

Company A

RouterFirewall

Extranet

Firewall

Router

Host system

Internet

ISP

ISP

ISP

ISP

ISP

ISP

Intranet

Firewall

Intranet & Internet

Intranet and Internet

Internet

ISP

ISP

ISP

ISP

ISP

Corporate Network

INTRANET

ISP

ISP

ISP

Access to Intranet

• Employee telephone directory

• Human resource policies

• Support information and

• Knowledge base

Access to Extranet

• Need to rapidly adapt to change

• Distribute information• Improve existing

information delivery techniques

• Supporting major strategic initiative

Reasons for using Intranets

• Employee productivity• Cost saving• Knowledge

management• E – commerce• Customer –

management improvements

Syndication for Various Reasons

Syndicate when you

Want to get your products/services located on as many affiliate web sites as possible

Have components that can be used in many different assembly & product configuration

Have a product that many people want , but your business partners want to brand it themselves

Have content that can be re-purposed in many ways

Have a e-commerce offering that will add value to others in your business network

Router

Firewall

The Internet

Extranet

Firewall

Router

Host System

Company A

Company B

Intranet Server

Intranet

Intranet

An Example of Intranets & Extranets

Applications of Extranet

Technology Applications

Secure Electronic Mail B2B Communications

Bulletin Board Subject review & response vehicle, FAQ

Instant Messaging Sales & customer support

Document Repository Knowledge management & customer support

FTP Customer support, sales support software development

Mail List Server Broad cash of changes & notification

Calendar Scheduling

Data conferencing & chat Electronic Meetings

Intranet and Extranets

ISP

ISP

ISP

ISPISP

ISP

INTRANET

IntranetIntranet

IntranetIntranet

IntranetIntranet

IntranetIntranet

IntranetIntranet

ISP

ISP

ISP

ISP

ISP

ISP

Government website

Corporate site

Search Engine

University websiteSearch Engine

-Netscape navigator

-MS Internet Explorer

-other

Web Browsing

company

supplier

Intranet

Intranet

Company location 1

Company location 2

customer

Extranet

Extranet

Extranet

Extranet

Intranet

Relationship between Internet, Intranet, Extranet

Firewalls

Firewall

Through file

server

Outside Internet

LAN

Inside LAN