World wide web


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World wide web

  1. 1. Prepared by: Monares, Mayjyn G.
  2. 2. A way of exchanging information between computers on the internet. The network of pages of images, texts and sounds on the internet which can be viewed using browser software. 1989-1990- Tim Berners Lee invents the World Wide Web at
  3. 3. • Clients use browser application to send URIs via HTTP to servers requesting a Web page • Web pages constructed using HTML (or other markup language) and consist of text, graphics, sounds plus embedded files • Servers (or caches) respond with requested Web page – Or with error message
  4. 4. • Client’s browser renders Web page returned by server – Page is written using Hyper Text Markup Language (HTML) – Displaying text, graphics and sound in browser – Writing data as well • The entire system runs over standard networking protocols (TCP/IP, DNS,…)
  5. 5. • Structural ComponentsStructural Components – Clients/browsers – to dominant implementations – Servers – run on sophisticated hardware – Caches – many interesting implementations – Internet – the global infrastructure which facilitates data transfer
  6. 6. • Semantic ComponentsSemantic Components – Hyper Text Transfer Protocol (HTTP) – Hyper Text Markup Language (HTML) • extensible Markup Language (XML) – Uniform Resource Identifiers (URIs)
  7. 7. Four basic phases:  connection  request  response  close
  8. 8. First, the user can use the browser to connect with the server. The browser works by using a special protocol, which is called HTTP to request a specially encoded text from the web server. The text is written in HTML, which tells the browser how to display the text on the user’s screen. . One can also use ftp, gopher, wais, telnet and archive to command the server to search for the information desired. Web pages are written in HTML
  9. 9. <H1>, which means the page heading. The commands are enclosed in angle bracket. URLs (UNIFORM RESOURSE LOCATORS), an Internet address. Four parts: protocol domain name Path Filename
  10. 10. Example: rnetsearch.html
  11. 11. Hypertext system, which allows a user to move from document to document without knowing the address of specific web sites. For example: The text on the screen will have some highlighted spots. One needs only to click the mouse, and the information will be pulled to the screen in a few seconds.
  12. 12. Students have access to a wide range of knowledge Students can develop in socially relevant ways.
  13. 13. The Internet is a massive network of networks, a networking infrastructure. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet.
  14. 14. The World Wide Web, or simply Web, is a way of accessing information over the medium of the Internet. It is an information-sharing model that is built on top of the Internet. 
  15. 15. Thank You for ListeningThank You for Listening 