diff intranet and extranet
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Relationship between Intranet and Extranet
By: Mohammed Nadeem
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The Internet
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The Internet is a public and global communication network that provides direct connectivity to anyone via a Local Area Network (LAN) and an Internet Service provider (ISP). Access to the Internet is not restricted to anyone. This lack of control may result in an information overload. Due to its vast scope and openness, the information is difficult to locate. Users need effective and efficient search engines to navigate the sea of information . There is no centralized control of network and information.
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The Intranets
Intranet uses the same Web interface but put up firewalls (a special security software) so that only employees could access the company’s Web site. It is an internal organizational Internet.
Only employees who are issued passwords and access codes are able to use them.
Firewalls protect intranets from unauthorized outside access.
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Public/ExternalInternet Users
Intranet
Clients
ServersERP
Legacy systems
E-mail servers
Web servers
Databases
Firewalls
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The Intranet (cont.)
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Firewalls
Software and hardware that allows only those external users with specific characteristics to access a protected network
Usually located at a gateway point and controls traffic between internal and external networks
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Advantages of Intranets
Intranets help employees to quickly locate information and applications relevant to their roles and responsibilities.
Standard interface, allowing “access from anywhere”.
Can serve as a powerful tool for communication within an organization.
Permits information to be published.
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The Extranet
An extranet implies an “extended intranet”, which uses TCP/IP protocol networks (like the Internet) to link intranets in different locations.
Extranet is somewhere between Internet and Intranet. It also uses firewalls, but it allows only selected outsiders, such as business partners, suppliers, and customers, to access the company’s Web site.
Can be viewed as part of a company’s
Intranet that is extended to users outsidethe company.
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Tunneling Internet
Extranet
IntranetFirewall
Intranet
Firewall
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The Extranet (cont.)
SuppliersVPN
Distributors VPN
Customers
VPN
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Virtually Private Network (VPN)
VPN is a secure network on the Internet using the tunneling schemes
When two sites are connected across a VPN, each must have a VPN-capable router, firewall, or VPN access device installed
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Advantages of Extranet
Can improve organization productivity. Allows information to be viewed at times convenient for external users.
Cuts down on meeting times.
Information can be updated instantly. Authorized users have immediate access to latest
information.
Can improve relationships with customers
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Summary : Internet, Intranet, and Extranet
Network Typical Type of Type Users Access Information
Internet Any individual with dial-up access or LAN
Unlimited, public; no restrictions
General, public and advertisement
Intranet Authorized employees ONLY
Private and restricted
Specific, corporate and proprietary
Extranet Authorized groups from collaborating companies
Private and outside authorized partners
Shared in authorized collaborating group
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Industry Specific Intranet Solutions
Financial Services: Banking, brokerages and other financial services, insurance
Information Technology Manufacturing: Chemicals and oil, consumer goods,
food and beverages, general manufacturing, and pharmaceuticals
Retailing Services: Construction and engineering, education,
environmental, healthcare, media, entertainment, telecommunications, transportation, and utilities
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Enterprise
ConsumersSuppliers
Clients
Business Partners
Distributors
VPN
Internet
Intranet
Extranet
IntranetIntranet
Intranet
Intranet
VPN VPN
VPN
VPN
RemoteEmployees
Basic Concept of Extranets Revisited
© Prentice Hall, 2000
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Elements of Extranets
Components of Extranets Intranets Web server Firewalls
Tunneling technology Interface software Business application
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Productivity Enhancements
Benefits of Extranet Application
Just-in-time (JIT) information delivery Reduction of information overload Productive collaboration between
workgroups Training on demand
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Business Enhancements
Benefits of Extranet Application
Faster time to market Improved client relationships New business opportunities
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Thank You