Download - Chapter 1 - The Web Becomes 2.0
Web 2.0: Concepts
and Applications
11The Web Becomes 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
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Overview
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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
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How the Web Has Changed
Newer Web sites provide users with a rich browsing experience– Customizable layout– Bold graphics– Tabs– Additional services
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How the Web Has Changed
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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
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Social and Technological Developments that Led to Web 2.0
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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 2001The Web became a platform for social
networking, collaboration, and communication
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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
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The Web Browser
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The Web Browser
Modern Web browsers have streamlined their appearance
Tabbed browsing allows users to open new Web pages in a single browser window
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The Web Browser
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Features of Web 2.0 Applications
Online conversations– Blogs– Wikis– Sharing media– Collaboration
Digg is a Web site that allows its readers to submit interesting news stories that they find online and digg, or vote for, the news stories that others submitted
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Features of Web 2.0 Applications
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Features of Web 2.0 Applications
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
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Features of Web 2.0 Applications
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The Web as a Platform for Running Applications
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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
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A Database-Backed Web
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A Database-Backed Web
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Software Accessible on Many Devices
You can browse Web content from almost anywhere on almost any electronic device that has a screen
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Software Accessible on Many Devices
In order for a Web application to run on different devices, it is important that they are designed in such a way that separates the process of accessing information from the process of displaying that information
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Software Accessible on Many Devices
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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
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Rich User Experience
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Rich User Experience
Predictive look-ahead, or AutoComplete, provides suggestions of valid responses based on letters that a user enters in a text box
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Rich User Experience
AJAX relies on standard Web technologies to provide an engaging user experience
A browser plug-in is a software component that enables dynamic, animated display and functionality within a Web browser– Flash– Silverlight
Many rich Internet applications allow users to create, stream, or view video
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Rich User Experience
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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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Web 2.0: Concepts
and Applications
11The Web Becomes 2.0
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Chapter 1 Complete