1. Lesson 2: The World Wide Web Objectives After completing this lesson, you will be able to:  Define WWW and its relation to the Internet.  Explain how Web addresses work.  Explore Web sites by using a search engine.  Explain how to perform transactions over the Web.  Define browser plug-ins and explain their uses.

2. Introduction the World Wide Web The World Wide Web (WWW or simply, the Web):  Refers to the collection of information that is accessible on the Internet.  The information is in the form of text, pictures, and sound.  The Web is a very popular service on the Internet.

3. Introduction the World Wide Web (cont.) Web and the Internet are technically two different terms: oThe Internet connects multiple computers and forms a network on which a computer can communicate with another computer. oThe Web is a way of accessing and sharing information over the Internet by using Web browsers.

4. Web Components  Web browser is a software program that enables you to view and interact with various resources on the Web.  Web page is a document on the Web. It is a formatted text document that a Web browser can display.  Web site is one or more Web pages that reside on a single server.

5. Web Addresses oEvery Web site on the Web is stored on a computer that is part of a vast network. oTo access a Web site, you need to access the computer on which the Web site is stored. oEach computer on the Web is identified by a unique address, known as the Internet Protocol (IP) address. oThe IP address is a numeric address that specifies the exact location of a computer on the Web.

6. Web Addresses (cont.)  A Web site for a domain is accessed with the help of a unique alphanumeric address known as the Web address.  The Web address is also known as the Uniform Resource Locator (URL), which specifies the protocol to be used and the exact location of the Web site.  A protocol is a standard method of transferring data between different computers.

7. Web Addresses (Cont.) http://www.microsoft.com/learning/default.asp Element Description http://Indicates the protocol to be used to access a file. wwwIndicates that the Web site is on the World Wide Web. microsoftIndicates the name of the Web site..comIndicates the type of domain. /learning/default.aspIndicates the path of the document.

8. Examples of domain name suffixes. SuffixDescription.comIndicates that the Web site is for a commercial organization..eduIndicates that the Web site is for educational institutions, such as schools, colleges, and universities..netIndicates that the Web site is for a network-oriented organization or for an ISP..orgIndicates that the Web site is for a nonprofit organization..infoIndicates that the Web site is informative in nature..museumIndicates that the Web site is used for a museum or for an individual of the museum profession.

9. Working with Internet Explorer  Please follow these steps to practice:  Open Microsoft Digital Literacy siteMicrosoft Digital Literacy site  Click on Internet module.  Click on “Launch E- learning.  Click on the “Play” button.  Follow steps on the left screen. 1 2 3 4 3

10. E-Commerce E-commerce refers to the business transactions made over the Internet, such as buying and selling items online.

11. E-Commerce (cont.) Example: Purchasing Museum Online Tickets  Step 1: access the museum’s Web site.  Step 2: create a new account.  Step 3: select the date and the number of tickets you want to purchase.  Step 4: provide your credit card details along with the shipping address.  Step 4: record your transaction code that you can use for any further queries related to this purchase.

12. Using Browser Plug-ins  A Web page may contain content in the form of animation, video, or audio files. To view these files, you need additional programs known as plug-ins.  Plug-ins provide added functions by allowing the Web browser to access and run files that are included in Web pages.  Some popular plug-ins are available with most of the Web browsers.  Certain plug-ins that you need to install or update to be able to view Web pages with new features and file formats.

13. Using Browser Plug-ins Download Plug-Ins 1)In the Address bar, type http://www.msn.com, and then click Go. 2)On the left column of the MSN home page, click Video. 3)Click Download Microsoft Windows Media Player. 4)To download the plug-in, click Download Now twice. 5)Click Run. 6)Click Run. 7)Click I Accept.