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Introduction to Web Computing

Introduction to Web Computing. By J. H. Wang Sep. 26, 2011. What’s the Web. World Wide Web: WWW (or the Web) Proposed by Tim-Berners Lee in 1989 Based on ideas from hypertext systems

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Introduction to Web Computing

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  1. Introduction to Web Computing By J. H. Wang Sep. 26, 2011

  2. What’s the Web • World Wide Web: WWW (or the Web) • Proposed by Tim-Berners Lee in 1989 • Based on ideas from hypertext systems •  "... to link and access information of various kinds as a web of nodes in which the user can browse at will"

  3. World Wide Web • Client: browser (e.g. IE, firefox) • To view web pages that may contain text, images, videos, and other multimedia and navigate between them via hyperlinks • Server (e.g. Apache httpd) • To host web pages and multimedia files

  4. Three Major Technologies • URL (Uniform Resource Locator) or URI (Uniform Resource Identifier): a system of globally unique identifiers for resources on the Web and elsewhere • HTML (HyperText Markup Language): the publishing language • HTTP (Hypertext Transfer Protocol): the protocol

  5. What’s Related to Web Computing • Web protocols and formats • Versions, new features, security issues • Web search and other Web services • Information retrieval • Web mining • Web content mining • Web structure mining • Web usage mining

  6. Some Interesting Problems • What’s the size of the Web? • At least 11.49 billion pages, according to http://www.worldwidewebsize.com/ • How to search the Web efficiently? • Crawling (Ch.20) • How to identify the most linked pages? • Link analysis (Ch.21) • How to identify the spam pages? • (Ch.19)

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