Lesson 2: The World Wide WebObjectives

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.

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.

Introduction the World Wide Web (cont.)

Web and the Internet are technically two different terms:

o The Internet connects multiple computers and

forms a network on which a computer can communicate with another computer.

o The Web is a way of accessing and sharing information over the Internet by using Web browsers.

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.

Web Addresses

o Every Web site on the Web is stored on a computer that is part of a vast network.

o To access a Web site, you need to access the computer on which the Web site is stored.

o Each computer on the Web is identified by a unique address, known as the Internet Protocol (IP) address.

o The IP address is a numeric address that specifies the exact location of a computer on the Web.

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.

Web Addresses (Cont.)

http://www.microsoft.com/learning/default.asp

Element Description

http:// Indicates the protocol to be used to access a file.

www Indicates that the Web site is on the World Wide Web.

microsoft Indicates the name of the Web site.

.com Indicates the type of domain.

/learning/default.asp Indicates the path of the document.

Examples of domain name suffixes.

Suffix Description

.com Indicates that the Web site is for a commercial organization.

.edu Indicates that the Web site is for educational institutions, such as schools, colleges, and universities.

.net Indicates that the Web site is for a network-oriented organization or for an ISP.

.org Indicates that the Web site is for a nonprofit organization.

.info Indicates that the Web site is informative in nature.

.museum Indicates that the Web site is used for a museum or for an individual of the museum profession.

Working with Internet Explorer

Please follow these steps to practice:

Open Microsoft Digital Literacy site

Click on Internet module.

Click on “Launch E-learning.

Click on the “Play” button.

Follow steps on the left screen.

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E-Commerce

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

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.

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.

Using Browser Plug-insDownload 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.