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Internet

Internet. Search Engine. Helps us search web sites on WWW by matching keywords crawler->index. Kinds of Search Engine. General searches( e.g.. Yahoo) Specialized searches (e.g. wisenews) General searches using natural languages (e.g.Ask Jeeves). Advanced search.

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Internet

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  1. Internet

  2. Search Engine • Helps us search web sites on WWW by matching keywords • crawler->index

  3. Kinds of Search Engine • General searches( e.g.. Yahoo) • Specialized searches (e.g. wisenews) • General searches using natural languages (e.g.Ask Jeeves)

  4. Advanced search • http://uk.search.yahoo.com/web/advanced?ei=UTF-8&fr=yfp-t-702

  5. Web server • Contain a collection of web pages and linked files • Respond to the requested file

  6. File transfer • FTP/HTTP • Upload and download file • Streaming • Plug-ins • Anonymous FTP • Two mode : ASCII and binary

  7. E-mail • Pyc05130 @ pyc.edu.hk • Two basic type: Dedicated e-mail software • -need configuration • Web-mail

  8. Video-conferencing • Face-to-face • Software : Microsoft messenger

  9. E-commerce • Advertisement • Shop • Online bank

  10. Models • B2B • B2C • C2C

  11. Adv (seller) • Minimal sales cost • Access to worldwide markets • Increase competitiveness with large companies

  12. Disadv (seller) • Can’t interact face-to-face with customers • Additional cost on building and maintaining web server • Difficult to promote the service to the customers who not use internet

  13. Adv (buyer) • Can find hard-to-get items • Automated cost-comparison available

  14. Disadv (buyer) • Pay for shipping and wait for delivery • Can’t see the product before buying items • Difficult to return defective items to the sellers

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