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Web 2.0

The Web Becomes 2.0. Web 2.0. Overview. The World Wide Web has changed the way that people Do business Communicate Share information The Web has evolved from a collection of Web sites to supporting Web applications Web 2.0 is characterized by interactive applications. Overview.

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Web 2.0

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  1. The Web Becomes 2.0 Web 2.0

  2. Overview • The World Wide Web has changed the way that people • Do business • Communicate • Share information • The Web has evolved from a collection of Web sites to supporting Web applications • Web 2.0 is characterized by interactive applications

  3. Overview

  4. How the Web Has Changed • Early Web sites contained mostly text and small graphics • Graphics were minimized to decrease the time it takes to load a page using a slower Internet connection • Web sites were not always intuitive • New Web sites contain a rich browsing experience • Customizable layout • Bold graphics • Tabs • Additional services

  5. Yahoo 1997 2012

  6. Social and Technological Developments that Led to Web 2.0 • Web 2.0 is the result of several evolutions: • Connectivity is available almost everywhere • The personal computer evolved into an appliance • Mobile phones are capable of accessing the World Wide Web • Web browsers are easy-to-use • Web-based applications were developed for many devices • Web developers deploy new versions of software applications • Society embraced technological changes

  7. Internet Connections • Dial-up • Allowed personal computers to connected to the Internet • Home phone was connected to a modem • Tied up phone line when computer was connected • Easy to set up • Was inexpensive • Digital subscriber lines (DSL) • Connect through cable, satellite, fiber-optic service providers • High speeds • Connect through cable modem or DSL • Internet enters the home through copper or fiber-optic cables, or home phone lines • Broadband connection are permanent and have a great bandwith

  8. Bandwidth Requirments

  9. Social and Technological Developments that Led to Web 2.0 • In the 1990s, many new companies called dot-coms used the Web to conduct business • Internet service providers • Amazon • Priceline • Many dot-coms went out of business by 2001 • The Web became a platform for social networking, collaboration, and communication

  10. The Web Browser • A Web browser is a software application for accessing and viewing Web pages • Mosiac • Later marketed as Netscape • First graphical interface to the World Wide Web • Internet Explorer • Became popular when distributed by Microsoft with Windows 95 • Firefox • Safari • Google Chrome

  11. The Web Browser

  12. The Web Browser • Modern Web browsers have streamlined their appearance • Tabbed browsing allows users to open new Web pages in a single browser window

  13. Features of Web 2.0 • Online conversations • Blogs • Wikis • Sharing media • Collaboration • To participate in Web 2.0 applications, you likely will need a username and password • A username is a unique code name that identifies you • A password is associated with your username • You should achieve greater password strength • During the authentication process, the application verifies your credentials

  14. The Web as a Platform for Running Applications

  15. A Database-Backed Web • Web 2.0 is often referred to as a read/write Web, or a database-backed Web • Web applications read from or write to a database • A Web server processes requests for Web pages sent over the Internet from a Web client • Client-server model

  16. A Database-Backed Web

  17. A Database-Backed Web

  18. Software Accessible of Many Devices • You can browse Web content from almost anywhere on almost any electronic device that has a screen

  19. Rich User Experience • Technologies such as AJAX, Adobe Flash, and Microsoft Silverlight allow Web browsers to display dynamic content without waiting for previous communication with the Web server to complete • Google Maps uses AJAX to allow the user to reposition a map or zoom in and out by dragging • Only the map portion of the window will be updated

  20. Rich User Experience • Predictive look-ahead, or AutoComplete, provides suggestions of valid responses based on letters that a user enters in a text box

  21. Summary • Web 2.0 is the name given to the shift in how people have come to use the World Wide Web • Many Web 2.0 sites allow users to share knowledge, opinions, images, or videos • Web 2.0 promotes a culture of participation • Users interact with Web 2.0 applications from a Web browser and variety of Internet-connected devices • Many Web applications use AJAX, Flash, and Silverlight

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