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Surfing The Web

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Surfing The Web

  1. 1. Surfing the Web Prof. Noraida Domínguez Flores ING 3202 Prof. Lydia Rodríguez 2008
  2. 2. Internet Terminology <ul><li>Network – group of connected computers that exchange information and share equipment. </li></ul><ul><li>Internet – worldwide network of networks encompasing more than 140 countries and millions of connected computers. Also called Cyberspace and World Wide Web. </li></ul>
  3. 3. Internet Terminology <ul><li>Web Site – is a university, government agency or company that stores Web pages you can view. </li></ul><ul><li>Web browser – is a program that lets you view and explore information on the WWW. </li></ul><ul><li>Search engine – is a software program that acts as a card catalog for the Internet. Locate desire information by searching for the keywords a user specifies. </li></ul>
  4. 4. Internet Terminology <ul><li>Portals – are web sites that provide search engines, plus content and services, such as e-mail, shopping, etc. </li></ul><ul><li>Database –is a collection of information that is organized and stored so it can be easily searched. </li></ul>
  5. 5. Internet Terminology <ul><li>Home page – the first page you see when you start your web browser. </li></ul><ul><li>URL – each web page has a unique address called URL. All web pages URLs start with http://. </li></ul><ul><li>Domain name – tells you the official registered name of each site. </li></ul>
  6. 6. Internet Terminology <ul><li>Domain extensions – are an extension of the URL. </li></ul><ul><ul><li>.edu .org </li></ul></ul><ul><ul><li>.com .es </li></ul></ul><ul><ul><li>.gov .pr </li></ul></ul><ul><ul><li>.mil .net </li></ul></ul>
  7. 7. Searching the web <ul><li>Keyword search – by writing one or two words, you can locate web sites that offer the information you need. </li></ul><ul><li>Boolean search – a search using the conectors and, or, not. </li></ul>
  8. 8. Example of a Boolean search <ul><ul><li>Example: if you want information about the legal issues of animal experimentation, then you can conduct a search using the following keywords: </li></ul></ul><ul><ul><ul><li>Animal experimentation AND legal issues </li></ul></ul></ul><ul><ul><li>Example: if you want information about the effects and causes of global warming, then you can conduct the following search: </li></ul></ul><ul><ul><ul><li>global warming AND effects OR causes </li></ul></ul></ul>
  9. 9. Boolean Search <ul><li>Using the connectors: </li></ul><ul><ul><li>animal experimentation and legal issues – retrieve web sites that contains both words. </li></ul></ul><ul><ul><li>causes or effects – retrieve web sites that contains any of the words. </li></ul></ul><ul><ul><li>animals not insects – retrieve web sites that contains the first word, but not the second. </li></ul></ul>
  10. 10. Search using a phrase <ul><li>When you search using a phrase, you should write it using “ “. Example: </li></ul><ul><ul><li>“ effects of global warming” – this search retrieves web sites that contains exactly the phrase you wrote. </li></ul></ul><ul><ul><li>This search limits the results to only those web sites that contains this phrase. </li></ul></ul>
  11. 11. After you find a web site <ul><li>When you find information through the Internet, you should consider some aspects to determine if this information is correct. </li></ul><ul><li>You should evaluate each web site to determine if you can use this information. </li></ul><ul><li>To not evaluate a web site can make you use a wrong information. </li></ul>
  12. 12. What to ask? <ul><li>After reading this presentation, read the presentation titled Evaluation of Web information. </li></ul><ul><li>After reading both presentations, complete the exercise that is going to be explained on the other presentation. </li></ul><ul><li>Be sure to complete the exercise by next week. </li></ul>

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