Transcript Drivers of Intranet & Extranet

Intranet & Extranet
To understand Intra-business e-Business
To describe Intranet and Extranet
To understand corporate portals
TCP/IP
Application
Application
TCP
TCP
IP
IP
Hardware
Sending computer
•
•
•
•
•
•
•
•
•
•
Internet
Hardware
Receiving computer
Message is sent from application layer to TCP layer
Message broken down into packets
TCP assigns a port number and sequence number
Packets and TCP header, passed on to IP
IP gives packets destination address
Hardware turns alphabetic text packets into electronic signals
and transmit over phoneline
ISP router examines destination address and sends off
At the receiving end we start at the bottom of stack
Headers are stripped off as packet goes up the stack
When data reaches to application layer, message is assembled
into its original form
So We have...
• Internet
– Most common platform for B2C
We also have...
• Intranet
– Most common platform for internal
corporate system
• Extranet
– The most common platform for B2B
Intranets
– Internal Web
– Primary platform to serve internal information
needs
– A wide variety of services
– A platform for provision of news and training
– A collaboration platform for the employees
– Enables easy access to corporate resources
– Could be connected to Internet
Advantages and disadvantages
of Intranets
• Advantages
– Low cost of converting client/server network
– Secure internal networks
• Through use of Firewalls
• Disadvantage
– Information overload
Types of Intranet
• A business to employee (B2E)
– Employees procure for themselves (needed
supplies)
– Corporate shop
– Information dissemination to employees
• between units within the business
• between employees within the business
Architecture of Intranet
ERP
Client’s
Browser
Application Servers
Legacy System
Intranet
Internet
Web Servers
E-Mail
Firewall
Product Database
Customer Database
Corporate Portal
•
•
•
•
•
•
Emerging due to information over-load
Personalised
Single point of access
Rich content
Narrow community
Can be delivered in phases
Corporate Portal Framework
Aneja et al, Intel Technology Journal Q1
External
Content
News and
News Feeds
Accessibility
External
Web Sites
External
Information
Resources
Internal
Information
Resources
Personalisation
Publishing
Search
Corporate
Knowledge
Collaboration
Portal Management
Applications
Business
Intelligence
Integration
Internal
Web Sites
Data
Warehouses
Organisational
Knowledge
Base
Scalability
Collaboration
Products
External
Services
Documents
Extranets
– Extended Intranet
– Primary platform for B2B exchanges
– A meeting place for for trading partners
– Adds value to customer experience
– Uses Internet infrastructure
– Non-proprietary technical tool that supports EC
Benefits of Extranets
– Enhanced communication
– Productivity enhancements
– Business enhancements
– Cost reduction
– Information delivery
Advantages and disadvantages
over proprietary networks
• Advantages
– Ubiquity of access
– Open standards
– Less costly
• Disadvantages
– System Vulnerability
– Slow Links
– Human Factors
The Architecture of Extranet
Browser
Remote Access Server
Remote dial-in Software
Dialling software
Firewall
Web Server
Intranet
VPN
Wireless
Roaming
Client
Corporate
Client
Web
Server
Remote Access
Server
Firewall
Enterprise
Network
Web
Internet
Browser
Dialling software
Connection Device
ISP
Corporate
Client
Server
Web
Client
Web
Need for Security
• Need
– Encryption
• Ensures privacy and Integrity
– Authentication
• Provides identification of remote user
Virtual Private Networks
Tunnelling Technology
TCP
IPSEC
IP
– VPN
• A network that uses public network to transmit data in
secure and private manner
– IPSEC
• Supported by Internet Engineering task force (IETF)
• Supported by the new IP6
• Designed to supports new encryption algorithms