1 / 35

Lesson 2 The Internet and the World Wide Web

Lesson 2 The Internet and the World Wide Web. Computer Concepts BASICS 4 th Edition. Wells. Objectives. Explain the origin of the Internet and describe how the Internet works Explain the difference between the World Wide Web and the Internet Describe the major features of the Internet

juan
Download Presentation

Lesson 2 The Internet and the World Wide Web

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lesson 2The Internet and the World Wide Web Computer Concepts BASICS 4th Edition Wells

  2. Objectives • Explain the origin of the Internet and describe how the Internet works • Explain the difference between the World Wide Web and the Internet • Describe the major features of the Internet • Explain how to connect to the Internet 2

  3. Objectives (continued) Describe a browser Identify browser features Apply and use browser features Describe other Internet features 3 3

  4. Address bar browser domain name home page host computer host node hyperlink Hypertext Markup Language (HTML) Hypertext Transfer Protocol (HTTP) Internet service provider (ISP) Vocabulary 4

  5. Vocabulary (continued) online service provider (OSP) protocol Transmission Control Protocol and Internet Protocol (TCP/IP) Uniform Resource Locator (URL) Web 2.0 Web page World Wide Web 5 5

  6. Introduction • Each day millions of people “surf”, or explore the information superhighway. • People use the Internet to: • Research information • Shop • Go to school • Communicate with friends and family • Read the daily newspaper • Make airplane or hotel reservations

  7. Evolution of the Internet • No one person or organization can claim credit for creating the Internet. • Internet origins trace back to 1960’s • United States Department of Defense (ARPANET) • Network created to allow scientists to share information on military and scientific research • 4 main host nodes: Univ. of California at Santa Barbara, Univ. of California at Los Angeles, Stanford Research Institute, and Univ. of Utah 7

  8. Evolution of the Internet • E-mail was added in 1972 • By 1989, more than 100,000 computers were linked to ARPANET • ARPANET ceased to exist in 1990, but functions continued • Real growth began when the World Wide Web came into being in 1992

  9. Evolution of the Internet • Thousands of interconnected networks called an Inter-Net-Network became known as the Internet • Mosaic browser introduced in 1993 • Made it easy to access the Internet • 340% growth in the number of users in one year • The Internet is still growing at an unprecedented rate.

  10. The Internet’s Impact on Society • In 2007, 70% of all Americans used the Internet • Used at home, work, and school • Numerous benefits: • Automated record keeping • Shopping • Benefits the physically disabled • Communications • Educational opportunities • Research

  11. Internet Basics The Internet links together networks and computers across the world to work together and share information Interoperability is the ability for all makes and models of computers to communicate Computers on the Internet communicate with each other using a set of protocols A protocol is a standard format for transferring data between two devices 11 11

  12. Internet Basics (continued) • TCP/IP or Transmission Control Protocol and Internet Protocol is the agreed upon international standard for transmitting data • TCP protocol enables two host computers to establish a connection and exchange data • IP protocol works with the addressing scheme • Domain name identifies a site on the Internet • Web address: www.microsoft.com • Domain name: microsoft.com

  13. The World Wide Web The World Wide Web is a subset or an application that makes use of the Internet The Internet can exist without the Web but the Web cannot exist without the Internet The Web began in 1990 when Dr. Berners-Lee introduced Hypertext Transfer Protocol (HTTP) which allow computers to communicate with hypertext documents Hypertext Markup Language (HTML) is the format of Web pages 13 13

  14. World Wide Web (continued) In 1993, the number of people using the Internet increased when Marc Andreesen introduced Mosaic, the first graphical browser 14 14

  15. World Wide Web (continued) • In 1994, Andreesen co-founded Netscape Communications • Popular Web browsers: • Firefox • Mozilla • Netscape • Safari • Opera

  16. World Wide Web (continued) In 2004, the phrase Web 2.0 was coined Web sites where users can modify content participatory Web blogs, wiki’s, social-networking sites 16 16

  17. Web Protocols-HTTP Web Protocols - HTTP defines how pages are transmitted Web server is a server that delivers or serves up Web pages Web page address is often referred to as the URL or Uniform Resource Locator First part of address indicates protocol to use Second part identifies the domain name 17 17

  18. Web Protocols-HTTP (continued) • Top-level domain abbreviations:

  19. Web Protocols-HTML Web Protocols - HTML determines how Web pages are formatted and displayed to users Hypertext is a text-based link to other documents and is often called a link or hyperlink A Web page is a text page coded with HTML markup tags 19 19

  20. Accessing the Internet To connect to the Internet you have to be connected and become part of a network A local area network (LAN) connects computers within a limited geographical area You connect using a network interface card (NIC) that is inside your computer 20 20

  21. Accessing the Internet (continued) Getting Connected: Step 1: You locate an Internet service provider (ISP) an Online service provider (OSP) or a Wireless Internet service provider (WISP) Step 2: Install the software provided by your ISP, OSP, or WISP Step 3: Install a browser 21 21

  22. Browser Basics Browser is a software program that you use to retrieve documents from the Web Internet Explorer 7 Tabbed browsing is a new feature When you start IE7, your first tab will be your home page To launch IE7 double-click on the icon or start the browser through the Start menu The Web site address goes in the Address bar 22 22

  23. Browser Basics (continued) Menu bar (left side of IE window) Options such as: File, Edit, Tools, Favorites, Help Command bar (right side, below menu bar) Options such as: Home, Feeds, Tools, Research AutoComplete Keeps track of Web addresses, forms, passwords Address list Displays previously visited Web pages 23 23

  24. Browser Basics (continued) • Internet Explorer browser window 24

  25. Parts of the Internet Explorer window

  26. Parts of the Internet Explorer window

  27. Browser Basics (continued) Your home page is the first pages that is displayed when you start your browser AutoSearch makes it easy to search by typing in common term in the address bar The History button allows you to see a list of sites you visited in the past (20 days default) Favorites allows you to designate a page as one you want to visit again 27 27

  28. Browser Basics (continued) The Content Advisor provides control over content that can be viewed When you explore the Web your browser keeps a record of sites visited in the disk cache. You can copy and paste information from Web pages or save the page 28 28

  29. Browser Basics (continued) To download means to transfer from a Web server or another computer to your computer 29 29

  30. Other Internet Features • A blog (short for Web log) is a Web page that serves as a publicly accessible journal • A chat room is when you can communicate real-time with another user or group of users • E-mail is electronic mail, and is one of the most popular services • FTP (file transfer protocol) is an Internet standard that allows you to download and upload files 30

  31. Other Internet Features (continued) Instant messaging allows you to communicate real-time with online friends A mailing list is a group of people with a shared interest A newsgroup is a discussion forum or type of bulletin board dedicated to a topic Online conferencing allows virtual meetings VoIP (Voice over IP) uses an Internet connection instead of a telephone line 31 31

  32. Summary In this lesson, you learned: • No one person or organization can claim credit for creating the Internet. • Origins of the Internet can be traced to the United States Department of Defense. • The original name for the Internet was ARPANET. • Mosaic was the Internet’s first graphical interface. • To connect to the Internet from a business, school, or other organization, you probably have a direct connection via a local area network and a network interface card. 32

  33. Summary (continued) • Types of Internet connections include modem and telephone line, DSL, cable modem, wireless, and fiber optics. • To connect to the Internet, you need an Internet connection, telecommunications software, and a browser for the Web. • Interoperability means that all brands, models, and makes of computers can communicate with each other. • A protocol is a standard format for transferring data between two devices. • TCP/IP is the agreed upon international standard for transmitting data. 33

  34. Summary (continued) • The domain name identifies a site on the Internet. • The Internet is made up of many services. • The Web is an application that makes use of the Internet. • Web pages can be linked through hyperlinks. • Microsoft Internet Explorer is a popular Web browser. • The HTTP protocol defines how Web messages are formatted and transmitted. 34

  35. Summary (continued) • A Web site address is referred to as the URL, or Universal Resource Locator. • Every Web page on the Internet has its own unique address. • HTML is a coding language that controls how Web pages are formatted and displayed. • A Web page is coded with HTML markup tags. • Other Internet services include blogs, chat rooms, e-mail, File Transfer Protocol, instant messaging, mailing lists, newsgroups and bulletin boards, online conferencing, and Voice over Internet Protocol. 35

More Related