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The Internet : Exploration, Evaluation, and Elaboration presented by Kathy Schrock.

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1 The Internet : Exploration, Evaluation, and Elaboration presented by Kathy Schrock

2 ©1995-2002. Kathy Schrock. All rights reserved. What is the Internet? Computers connected together are called a network. Networks let computers share programs and information. The Internet is a network of many smaller networks made up of millions of personal computers connected to thousands of host servers.

3 ©1995-2002. Kathy Schrock. All rights reserved. Segments of the Internet World Wide Web E-mail FTP Newsgroups

4 ©1995-2002. Kathy Schrock. All rights reserved. World Wide Web (WWW) Includes text and pictures Hypertext –Example: survey survey Sound and video can be accessed Point-and-click Use a Web browser to access

5 ©1995-2002. Kathy Schrock. All rights reserved. Internet Service Provider (ISP) A company that provides users access to the Internet For a monthly fee, you get … –a software package –a username –a password –an access phone number

6 ©1995-2002. Kathy Schrock. All rights reserved. Newsgroups Bulletin-board discussion groups based on various topics Thousands exist A good place to get information about an area of interest Remember that the responses come from all types of people

7 ©1995-2002. Kathy Schrock. All rights reserved. Web Browsers A computer program that lets you access the WWW and “browse” the Internet for information Common browsers : Netscape Navigator Internet Explorer Mozilla Firefox

8 ©1995-2002. Kathy Schrock. All rights reserved. Web Sites A single group of many pages dealing with the same topic is called a Web site. A Web site is like a magazine with many articles. A home page is like a front cover that tells what is inside.

9 ©1995-2002. Kathy Schrock. All rights reserved. Uniform Resource Locators A URL is the unique address assigned to each page on the World Wide Web For example –http://www.rvrhs.comhttp://www.rvrhs.com Similar to telephone number and street address

10 Anatomy of a URL http://www.capecod.net/schrockguide/eval.htm Hypertext Transfer Protocol Address of ISP Network domain Directory on the server File name (HTML format)

11 ©1995-2002. Kathy Schrock. All rights reserved. Speaking “URL” http://www.capecod.net/~kschrock/index.htm h-t-t-p colon slash slash w-w-w dot capecod dot net slash tilde kschrock slash index dot htm

12 ©1995-2002. Kathy Schrock. All rights reserved. Different Domains on the Net.comcommercial.netnetwork.edueducational.orgorganization.milmilitary.govgovernment

13 ©1995-2002. Kathy Schrock. All rights reserved. Search Engine Collections of resources that are compiled by human beings May be general or subject-specific May also be keyword-searchable  Yahoo (http://www.yahoo.com/)

14 ©1995-2002. Kathy Schrock. All rights reserved. Search Engines Also known as “spiders” or “robots” Computer programs that go out on the Internet, collect data from the servers, and index it so it is searchable by keyword  Altavista (http://altavista.digital.com/)  HotBot (http://www.hotbot.com/)  Excite (http://www.excite.com/)

15 ©1995-2002. Kathy Schrock. All rights reserved. Search Engine Practice (Boolean Search) And Plus Sign Quotes

16 ©1995-2002. Kathy Schrock. All rights reserved. Bookmarks A feature that lets you tell your browser to save your favorite URLs Lets you jump directly to a Web page you are interested in Saves the information that is in the title tag of the page you are viewing Don’t get carried away by bookmarks!

17 ©1995-2002. Kathy Schrock. All rights reserved. Saving Files To save the text from a page you are viewing choose File-Save As Save as either HTML or text file format Save as HTML if you are going to view the file in a browser Save as text if you are going to use in a word processing program

18 ©1995-2002. Kathy Schrock. All rights reserved. Saving Graphics To save a graphic appearing on a Web page On a Windows machine -- click on the right hand mouse button -- choose Save image as

19 ©1995-2002. Kathy Schrock. All rights reserved. Graphics Information The World Wide Web recognizes two main file formats for pictures GIF -- best used for line art JPEG -- best used for photographs

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