WWW: World Wide Web → The Web

• Provides access to information, to linked resources distributed at many hosts
• Allows:
  • Receive (and publish) information
  • “Navigate through an ocean” of information via hyperlinks, and the interaction of different Web pages
• Operates:
  • On demand
    • Users receive and publish “what they want” “when they want”
  • Client-Service Model

• Elements of the web architecture
  • Pages
    • HTML, hypertext, hyperlinks
  • Objects
    • Can reside at the same or another host
  • Addressing
    • URL: Uniform Resource Locator
  • Functional Entities
    • Web Client (Navigator)
    • Web server
  • HTTP Protocol

• Addressing
  • With a URL: Universal Resource Locator
    • Element for addressing resources
  • URL parameters
    1. Service identifier (protocol)
    2. Domain name of Server Host
    3. Path to access object
    4. Object name
  • URL syntax
    • Characters “://” separate first parameter from second one
    • Character “/” used to separate the rest of parameters

Figure 10 Example of URL showing the four types of parameters that usually compose it

• Web Client (Browser)
  • Includes:
    • User agent
      • Software that provides an interface between the user and Web application
      • Captures and visualizes pages and allows navigation through their contents
      • Diverse configuration characteristics
    • HTTP Client
      • Communication software that implements the HTTP Client part
    • Best known browsers:
      • Chrome
      • MS Internet Explorer / Edge
      • Firefox
      • Project
      • Contact
      • Disclaimer
      • PDF

      Project

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      This resource was developed as part of an Erasmus+ project, funded with support from the European Commission under grant agreement 2016-1-SE01-KA203-22064.

      The project was a collaboration between:

      • The University of Borås, Sweden
      • The University of the Highlands and Islands, Scotland
      • The University of Alcalá, Spain
      • Digital Connections, Scotland

        

      This resource has been released under Creative Commons license CC-BY-SA 4.0.

      Contact

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      If you would like more information on this resource please contact:

      • Academic content – The University of the Highlands and Islands (www.uhi.ac.uk)
      • Technical resource development – The University of the Highlands and Islands Educational Development Unit - EDU (edu@uhi.ac.uk)

      Disclaimer

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      Except where otherwise noted, this website is licensed under Creative Commons license CC-BY-SA 4.0. All images used under permission remain the copyright of the license holder.

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