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The Internet and the World Wide Web, Chapter 2

The Internet and the World Wide Web, Chapter 2. ITSC 1401 Intro to Computers Instructor: Glenda H. Easter. Learning Objectives. Discussion of the following items: Background of E-Mail The parts of an e-mail message. Description Information Superhighway Uses of the Internet.

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The Internet and the World Wide Web, Chapter 2

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  1. The Internet and theWorld Wide Web, Chapter 2 ITSC 1401 Intro to Computers Instructor: Glenda H. Easter

  2. Learning Objectives Discussion of the following items: • Background of E-Mail • The parts of an e-mail message. • Description • Information Superhighway • Uses of the Internet The Internet and the World Wide Web, Chp. 2B

  3. Learning Objectives (Continued) Discussion of the following items: • Internet Limitations • Common WWW Terms • Hypertext • Web Browsers • Popular Search Engines • Web Page vs. Web Site The Internet and the World Wide Web, Chp. 2B

  4. The Internet • What Is It? • Who Owns It? • Who Funds It? NII The Internet and the World Wide Web, Chp. 2B

  5. E-Mail • In 1970, e-mail became popular. • E-Mail is a way of sending electronic messages between computers. • E-Mail messages can contain text, graphics, images, and sound. Do you have mail? The Internet and the World Wide Web, Chp. 2B

  6. Basic Elements of an E-Mail • There are three parts of an e-mail. A header which has three parts The message (the actual text of the message).  The signature (this is additional information about the sender). The Internet and the World Wide Web, Chp. 2B

  7. Parts of the Header • The header has three parts: To Line (e-mail address of person receiving the e-mail). Subject Line (an on-line description of the subject). Attachment Line (This is a filename or graphic indicating that a message is included.) The Internet and the World Wide Web, Chp. 2B

  8. The Internet • The Internet is like a giant highway that connects millions of people and organizations. • It has created a cooperative society that forms a virtual community. The Internet and the World Wide Web, Chp. 2B

  9. E-Mail • In 1970, e-mail became popular. • E-Mail is a way of sending electronic messages between computers. • E-Mail messages can contain text, graphics, images, and sound. Do you have mail? The Internet and the World Wide Web, Chp. 2B

  10. Basic Elements of an E-Mail • There are three parts of an e-mail. A header which has three parts The message (the actual text of the message).  The signature (this is additional information about the sender). The Internet and the World Wide Web, Chp. 2B

  11. Parts of the Header • The header has three parts: To Line (e-mail address of person receiving the e-mail). Subject Line (an on-line description of the subject). Attachment Line (This is a filename or graphic indicating that a message is included.) The Internet and the World Wide Web, Chp. 2B

  12. Web Browser • The software that allows you to go from one resource to another by following hyperlinks is known as a Web Browser. • Of those previously mentioned browsers, all are graphical browsers with the exception of Lynx. • Lynx is a non-graphical browser.Lynx can retrieve documents that contain graphics, but just ignore the graphics and display only the text. The Internet and the World Wide Web, Chp. 2B

  13. Connect to the Internet • LAN Connection • Modem Connection • High-Speed Data Links The Internet and the World Wide Web, Chp. 2B

  14. E-Mail • In 1970, e-mail became popular. • E-Mail is a way of sending electronic messages between computers. • E-Mail messages can contain text, graphics, images, and sound. Do you have mail? The Internet and the World Wide Web, Chp. 2B

  15. Basic Elements of an E-Mail • There are three parts of an e-mail. A header which has three parts The message (the actual text of the message).  The signature (this is additional information about the sender). The Internet and the World Wide Web, Chp. 2B

  16. Parts of the Header • The header has three parts: To Line (e-mail address of person receiving the e-mail). Subject Line (an on-line description of the subject). Attachment Line (This is a filename or graphic indicating that a message is included.) The Internet and the World Wide Web, Chp. 2B

  17. Web Browser • The software that allows you to go from one resource to another by following hyperlinks is known as a Web Browser. • Of those previously mentioned browsers, all are graphical browsers with the exception of Lynx. • Lynx is a non-graphical browser.Lynx can retrieve documents that contain graphics, but just ignore the graphics and display only the text. The Internet and the World Wide Web, Chp. 2B

  18. Connect to the Internet • LAN Connection • Modem Connection • High-Speed Data Links The Internet and the World Wide Web, Chp. 2B

  19. Now What Did You Say the Internet Is? • The Internet is sometimes called the Information Superhighway. • Just as a road allows travel through different areas of a country, the Internet allows information to flow through many different interconnected computer networks.. The Internet and the World Wide Web, Chp. 2B

  20. Now What Did You Say the Internet Is? (Continued) • The Internet is simply a lot of computers connected to one another. • The Internet consists of millions of large computers that in turn connect tens of millions of participants with each other. • The Internet is also the home of a staggering amount of information and a large number of different services. The Internet and the World Wide Web, Chp. 2B

  21. Today’s Information HighwayThe Internet • An Information Highway • TCP/IP (Internet Protocols) • Packet Switching Network • Direct Access • Dialup IP • LAN dialup access The Internet and the World Wide Web, Chp. 2B

  22. About the Internet • The Internet has a set of rules for connecting networks. • The Internet began in 1969 when government and military agencies developed ARPANET (Advanced Research Project Agency Network) to share and communicate computer resources with researchers working on national security projects. The Internet and the World Wide Web, Chp. 2B

  23. Browsing the Web • Default start page • Accessing web pages • click a hyperlink • type a URL in the address or location box • click a button on the links toolbar hyperlink The Internet and the World Wide Web, Chp. 2B

  24. Default Start Page • To set the default start page: • Select preferences from the Edit menu. The Internet and the World Wide Web, Chp. 2B

  25. Returning to a Previous Site • Bookmarks Lists • Add • Edit • Individual links • Folders • Preset Links The Internet and the World Wide Web, Chp. 2B

  26. Returning to a Previous Site(Continued) • History List • Created Automatically • Visited Sites • Nine Days • Arranging • Searchable The Internet and the World Wide Web, Chp. 2B

  27. Returning to a Previous Site(Continued) • From desktop, right click on Netscape Explorer icon. • Highlight Properties • General • Temporary Internet Files • View files and view objects The Internet and the World Wide Web, Chp. 2B

  28. Returning to a Previous Site(Continued) Go Menu keeps track of all links accessed The Internet and the World Wide Web, Chp. 2B

  29. Web Browsers • Netscape • Internet Explorer • Lynx • Mosaic The Internet and the World Wide Web, Chp. 2B

  30. Web Browser • The software that allows you to go from one resource to another by following hyperlinks is known as a Web Browser. • Of those previously mentioned browsers, all are graphical browsers with the exception of Lynx. • Lynx is a non-graphical browser.Lynx can retrieve documents that contain graphics, but just ignore the graphics and display only the text. The Internet and the World Wide Web, Chp. 2B

  31. Network Access • You can access the Internet through an ISP (Internet Service Provider). • You can access your ISP through a modem which converts digital computer signals to telephone analog signals. • The Internet can also be accessed through a host computer (such as that used at El Centro and other colleges and universities.) The Internet and the World Wide Web, Chp. 2B

  32. Service Providers and Web Page Design • Service Providers such as America Online have templates you fill in and save as your Web page. The user is allowed a limited amount of space on which to create a Web page. Some of those templates can be found by accessing the following: www.geocities.com www.tripod.com The Internet and the World Wide Web, Chp. 2B

  33. Web Pages vs. Web Sites • Web Pages • Web Sites • Home Pages The Internet and the World Wide Web, Chp. 2B

  34. Internet Terms • Hypertext - No beginning and no end. • Web - A group of documents connected by hyperlinks. • Web Browser - software that allows you to go from one document to another. • Web Page - a document you create to share with others. • Web Site - A group of related web pages. The Internet and the World Wide Web, Chp. 2B

  35. Hypertext Markup Language • Documents sent by the server are written in HTML which stands for hypertext markup language. • The Web uses a writing technology called hypertext. • The order in which to read the document is determined by the author. • Hyperlinks or links pull multiple documents together with no fixed beginning nor ending. The Internet and the World Wide Web, Chp. 2B

  36. HyperText • The World Wide Web uses hypertext (the small hand that appears under a link) which references and links to other documents. The Internet and the World Wide Web, Chp. 2B

  37. Hyperlinks • Provide text, graphics, sound or video links • Blue underlined fonts are unexplored • Magenta links have been previously accessed www.microsoft.com www.microsoft.com The Internet and the World Wide Web, Chp. 2B

  38. Hypertext Links • Hypertext Links are called pages. • Pages may contain hypertext links to text files, graphic images, movies, audio, or video clips. • The WWW allows you to jump from one page to another in a non-sequential manner. The Internet and the World Wide Web, Chp. 2B

  39. URL -- Uniform Resource Locator http://www.annex.com/southwest/museum.htm Document Path (Directory or Folder) Internet Address (Web site) Means of access, HyperText Transfer Protocol The Internet and the World Wide Web, Chp. 2B

  40. Parts of URL Uniform Resource Locator • Protocol or vehicle • http, ftp, gopher, telenet (_________://), Location (such as Domain Name System) • host.organization.topleveldomain • http://www.rlc.dcccd.edu • Internet Address or Web Site • http://www.rlc.dcccd.edu/Human/ArtHP.htm • Directory, similar to DOS and Windows • /directory/subdirectory/subdirectory/file.ext • http://www.rlc.dcccd.edu/Human/ArtHP.htm The Internet and the World Wide Web, Chp. 2B

  41. Addresses for Internet • The Internet uses a method known as the domain name system (DNS) to assign addresses to people and computers. This system divides an address into three parts:- Domain Code(edu)- Domain Name(dcccd)- User Name(ghe5522)ghe5522@dcccd.edu The Internet and the World Wide Web, Chp. 2B

  42. Domain Name System • The Domain Name System (DNS) is an address that uses words rather than numbers. It is made up of two parts: An individual name (created for the individual user)  Domain (a name for a computer connected to the Internet) The Internet and the World Wide Web, Chp. 2B

  43. Internet Domain Codes • .com business (commercial) • .edu educational • .gov government • .mil military • .net gateway or host • .org other organization The Internet and the World Wide Web, Chp. 2B

  44. Research on the Web • Search Engines • Subject Directories (Web databases) • Yahoo • WWW Virtual Library • Alta Vista • Infoseek Guide The Internet and the World Wide Web, Chp. 2B

  45. Research on the Web • There are two ways to find information on the Web. Searching Browsing • You search when you know exactly what you want. • You browse if you have an idea of what you want. The Internet and the World Wide Web, Chp. 2B

  46. Search Engines • Search engines are accessed through Web browser software. • Each search engine has different searching options. • Search tools can be categorized as subject directories or Web databases. • Subject Directories classify subjects according to broad categories and multiple levels of subcategories. An example is Yahoo. The Internet and the World Wide Web, Chp. 2B

  47. Subject Guides Yahoo! is one of the most extensive subject guides. The Internet and the World Wide Web, Chp. 2B

  48. Search Engines Some leading search engines areAltaVista, Excite, and Infoseek . The Internet and the World Wide Web, Chp. 2B

  49. Using a Search Engine Effectively NOT • Boolean Logic • Boolean Operators • Search Items • False Drops • Hits • Result Ranking OR AND The Internet and the World Wide Web, Chp. 2B

  50. Search Techniques • Inclusion operator (+) • +kittens +care + Siamese • Exclusion operator (-) • +kittens +care + Siamese -classified • Wildcards • -classified* The Internet and the World Wide Web, Chp. 2B

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