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The Internet.

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Presentation on theme: "The Internet."— Presentation transcript:

1 The Internet

2 Did you know that the terms "Internet" and "World Wide Web" do not mean the same thing? The Internet is like a department store and the World Wide Web is one of its departments. Just like the Canadian Tire store has several departments such as Sporting Goods, Housewares, and Automotive, the Internet has several departments or subnetworks

3 The Web The World Wide Web or "Web" is the largest and most well-known subnetwork on the Internet. The Web uses hypertext transfer protocol (HTTP), which allows users to retrieve information and jump (hyperlink) to other Web pages. Hypertext transfer protocol (HTTP) is the language of the Web. Later in this course, you will learn about HTTP and will create your own web pages.

4 Protocol Every subnetwork on the Internet uses a protocol or digital language. Here are some subnetwork protocols that you might already be familiar with: Protocol (language) Abbreviation Purpose Hypertext Transfer Protocol HTTP web pages Secure Hypertext Transfer Protocol HTTPs or SSL e.g., logging into your bank account Simple Mail Transfer Protocol/Post Office Protocol SMTP or POP File Transfer Protocol FTP file downloading Internet Message Access Protocol IMAP Instant Messaging IM live chat Transmission Control Protocol/Internet Protocol TCP/IP binds all of the above protocols together

5 Special software To browse the Web you require special software such as Internet Explorer, Firefox, Safari. These programs will allow you to search for and view files on the Web. You may also want to install optional "plug-ins" to enhance your web browser. These plug-ins will allow you to hear audio files and view video files. Adobe, Windows Media Player

6 Accessing pages on the Web
If you know the URL or address of a website, you can type it into the address bar and press Go to jump to that page. A URL stands for Uniform Resource Locator.

7 Here is a sample URL: The above URL is for the Ontario Ministry of Education. Here is its structure:

8 Searching for Web pages
Often you need to find Web documents and don't have the Web address. When you search for information on the Web, you are not searching the Web directly, but rather using a search tool that will search its database or a collection of sites. Note that no single search tool is able to search the entire Web. Also, it is important to note that when searching on the Web, you are often searching documents and files that were posted months/years ago so it is important to check when they were uploaded and/or revised.

9 Search Engines Search engine searches large databases of information by a keyword or phrase. This database of Web files is put together by a spider or crawler that crawls through the Web grabbing content and adding it to the search engine index. Example: Google, Yahoo Pros Cons results in a wide variety of information results may not be relevant to search generally produces quality search results may produce a large quantity of results that must be sifted through often promoted by e-commerce and the results will reflect this

10 Meta Search Engines Meta search engines search the database of several search engines. A meta search engine is useful for searching less known search engines. EXAMPLE: Metacrawler, dogpile Pros Cons useful for a broad search results may not be relevant to search useful for searching an obscure topic that has not been producing any results may produce a large quantity of results that must be sifted through

11 Subject Directories A subject directory is a database categorized by subject. The categories are created and maintained by human editors. Example: Librarian Search Directory Pros Cons useful when it is difficult to define the search in a few words searches tend to be less specific results tend to be fewer but of a higher quality of content tends to be informative rather than commercial useful

12 Assignment One of your customers has requested your assistance. He has written a quiz on literature and wants you to find the answers. You, as the owner of the store, have agreed to assist your customer and are going to search for the answers using the Web. Use a three-column table to present the information attractively (borders, shading, and images). Remember that formatting should enhance the presentation of the information and not overpower the message. Use the following headings for your table: --Question --Answer --URL where the answer was found

13 Questions to be answered:
Who wrote the famous quotation, "I am only one."? Who wrote this famous children's tale that was originally written in French by an aviator in 1942? Who was the famous author whose half-sister named Fanny Imlay committed suicide? Grogan wrote a book about a dog. What was the breed of the dog? Robert Langdon, a professor, is the protagonist in this book. What is the title of the book? What was the author L. Frank Baum looking at when he thought of the name Oz? What was the title of the book that the famous author J. K. Rowlings wrote when she was six years old? Who was the author that Oprah recommended and was later found to have lied in his memoirs of addiction and recovery? "And that has made all the difference." is the final line of what poem? What is the name of a Canadian website where you can find a list of the top selling books? When did Chapters first open? Is the author of Anne of Green Gables still alive?

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