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
Auto
risi
ng
tool
s,D
evel
opm
ent t
ools
se
arch
eng
ines
Fire
wal
ls, p
assw
ords
en
cryp
tion
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