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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. Internet. Hardware. Sending computer. Receiving computer.

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Intranet & Extranet

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  1. Intranet & Extranet • To understand Intra-business e-Business • To describe Intranet and Extranet • To understand corporate portals

  2. TCP/IP Application Application TCP TCP IP IP Hardware Internet Hardware Sending computer 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

  3. 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

  4. 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

  5. Advantages and disadvantages of Intranets • Advantages • Low cost of converting client/server network • Secure internal networks • Through use of Firewalls • Disadvantage • Information overload

  6. 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

  7. Architecture of Intranet ERP Application Servers Client’s Browser Legacy System Internet Intranet Web Servers E-Mail Firewall Product Database Customer Database

  8. Corporate Portal • Emerging due to information over-load • Personalised • Single point of access • Rich content • Narrow community • Can be delivered in phases

  9. Corporate Portal FrameworkAneja et al, Intel Technology Journal Q1 External Content News and News Feeds Accessibility Corporate Portal Applications External Web Sites Personalisation External Services Publishing Search External Information Resources Security Extensibility Collaboration Knowledge Management Internal Information Resources Data Warehouses Integration Business Intelligence Internal Web Sites Organisational Knowledge Base Scalability Collaboration Products Documents

  10. 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

  11. Benefits of Extranets • Enhanced communication • Productivity enhancements • Business enhancements • Cost reduction • Information delivery

  12. Advantages and disadvantages over proprietary networks • Advantages • Ubiquity of access • Open standards • Less costly • Disadvantages • System Vulnerability • Slow Links • Human Factors

  13. The Architecture of Extranet Browser Remote Access Server Remote dial-in Software Dialling software Firewall Web Server Intranet VPN Wireless Roaming Client Remote Access Server Corporate Client Web Server Firewall Enterprise Network Web Internet ISP Browser Dialling software Connection Device Corporate Client Server Web Client Web Client

  14. Need for Security • Need • Encryption • Ensures privacy and Integrity • Authentication • Provides identification of remote user

  15. Virtual Private NetworksTunnelling Technology TCP IP IPSEC • 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

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