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MELJUN CORTES Web & Internet
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MELJUN CORTES Web & Internet


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MELJUN CORTES Web & Internet

MELJUN CORTES Web & Internet

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  • 2. Purpose of Web page and Web site  Communicate  Educate  Entertain or  Conduct business
  • 3. The Internet  The most popular and fastest growing area.  What is the use of Internet?  Using the Internet:  Do research  Get a loan  Shop for services  Merchandise  Job hunt  Buy and sell stocks  Watch movies and etc.  Shop for services
  • 4. The Internet  Is a worldwide collection of networks, each is composed of a collection of smaller networks.
  • 5. Network  Is composed of several computers connected together share resources and data.  ISP – Internet Service Provider, is a business that has permanent Internet connections and provides temporary connections to individuals and companies free or for a fee.
  • 6. Data Travels via Internet Step1: A personal Computer’s request for information travels to the ISP. Step2: When the request leaves the ISP, it travels over medium speed data lines, microwave stations, and communications satellites until it reaches the internet backbone.
  • 7. Data Travels via Internet  Internet backbone – a high-speed data lines that connect major computer systems located around the world. Step 3: The request travels over high-speed data lines along the Internet backbone.
  • 8. Data Travels via Internet Step 4: The request travels over medium- speed data lines until it reaches the destination network server.
  • 9. World Wide Web  The collection of links throughout the Internet creates an interconnected network.  Which also referred to as the Web or WWW.  Web site – Web containing information that can be referenced with a link. It is a collection of linked Web pages, typically starts with a home page.
  • 10. World Wide Web  Web page – Graphics, text, and other information available at a Web site are stored in a specifically formatted electronic document.  Home page – provides information about the Web site’s purpose and content.  Splash page – is a lead-in page often containing multimedia.
  • 11. World Wide Web  Multimedia – is some combination of text, graphics, animation, audio or video.
  • 12. Accessing Information on the Web  Connecting to the Web is through Public Switch Telephone Network (PSTN)  A worldwide telephone system that handles voice-oriented telephone calls.  Dial-Up Lines  Is a temporary connection that uses one or more analog telephone lines for communication.
  • 13. Accessing Information on the Web  Dedicated Lines  Is a connection that always is established between two communications devices  Transfer rate – is the speed at which a line carries data and information. It expresses as bit per second (bps). It ranging from thousands of bits per second called kilobits per second (Kbps), Millions of bits per second called Megabits per seconds (Mbps), billions of bits per second called (Gbps).
  • 14. ISDN Lines  Integrated Services Digital Network  Provides faster transfer rates than dial-up telephone lines.  A set of standards for digital transmission of data over standard copper telephone lines.
  • 15. Speeds of Various Connections to the Internet $10,000 or more44 MbpsT3 $1,000 or more1.544 MbpsT1 $30 to $70128 Kbps – 2.5 Mbps Cable TV (CATV) $38 to $110128 Kbps – 8.45 Mbps ADSL $10 to $40Up to 128 KbpsISDN Local or long- distance rates Up to 56 KbpsDial-up Approximate Mo. Cost Transfer RatesTypes of Line
  • 16. Four Types of Dedicated Line  DSL – Digital Subscriber Line  another digital alternative for the small business or home user.  Installation can provide a dial tone, so you can use the line for both voice and data.  ADSL – Asymmetric Digital Subscriber Line  Type of DSL that supports faster transfer rates when receiving data than when sending data.
  • 17. Four Types of Dedicated Lines  ISDN – Integrated Services Digital Network  Use for small business and home user.  Faster than transfer rates than dial-up.  Set of standard for digital transmission of data over standard copper telephone lines.
  • 18. Four Types of Dedicated Lines  Cable Television Lines  CATV lines a popular type of dedicated line that allows the home user to connect to the Internet.  T-carrier Lines  Type of digital lines that carry multiple signals over a single communication line.  Provides extremely fast data transfer rates.  Only medium to large companies usually can afford the investment in T-carrier line.
  • 19. Service Providers  An Internet Service Provider (ISP) – is a business that has a permanent Internet connection and provides temporary connections to individuals and companies free or for fee.  POP (Point of Presence) – To use a telephone line to access the Internet, the telephone number you dial connects you to an access point on the Internet.
  • 20. What do you considered when selecting a service provider?  Be sure it provides at least one local POP telephone number otherwise you will pay a long distance telephone charges.
  • 21. Types of ISP  A Regional ISP  Provides access to the Internet through one or more telephone numbers local to a specific geographic area.  A National ISP  Is a larger business that provides local telephone numbers in most major cities and town s nationwide.
  • 22. WEB BROWSER  To view Web pages on a computer monitor.  Called browser, a specific software program that allows for the display of Web pages.  Example: Netscape, IE, Mozilla Firefox
  • 23. WEB BROWSER  One way to access a Web page is to enter its unique address, called Uniform Resource Locator (URL) in the browser’s address bar or location field.  URL – begins with the protocol, Hypertext Transfer Protocol (HTTP).  HTTP – is the communications standard to transmit data on the Web.
  • 24. WEB BROWSER  Domain Name – which is the text version of a numeric address for each computer on the Internet, follows the protocol.   protocol Domain name protocol IP address The Numeric address commonly referred to as an IP address
  • 25. Common Domain Name and Country Abbreviations ?org ?net ?mil ?gov ?edu ?com OrganizationOriginal Top-Level Domain Abbreviations
  • 26. Common Domain Name and Country Abbreviations ?uk ?se ?fr ?ca ?au CountryCountry Abbreviations
  • 27. Alternative Web Page Viewing Devices  You can view Web Page using the following:  Desktop computer monitor  Notebook computer  Handheld computer (PDA)  Web TV (for a television set)
  • 28. Search Engine  Software programs that find Web sites and Web pages.  How do you locate Web page on particular topics in the search engine’s text box ? keyword
  • 29. Portal  Are Web sites that offer not only search services but also e-mail, chat rooms, news and sports, and maps.  Examples: Excite Yahoo Alta Vista
  • 30. IMPACT OF THE INTERNET AND THE WEB  Communication  Education  Entertainment  Business
  • 31. TYPES OF WEB SITES  Personal  Allows you to advertise your employment credentials, meet new friends, or share a common interest or hobby with fellow enthusiasts.  Organization / Topical  Create an organization Web site to promote member accomplishments or to encourage support and participation.
  • 32. TYPES OF WEB SITES  Commercial  The goal is to promote and sell a product(s) or service(s).  A larger organization or corporation frequently creates an intranet. (PN)