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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.
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 outside
The Extranet (cont.) Tunneling Internet Extranet Intranet Firewall Intranet Firewall Suppliers VPN Distributors VPN Customers VPN
Authorized users have immediate access to latest information.
Can improve relationships with customers
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