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Chapter 6 internet

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  • 1. Chapter 6 INTERNET
  • 2. INTERNET
    • IS A COLLECTION OF COMPUTERS THROUGHOUT THE WORLD WHICH ARE CONNECTED MOSTLY USING TELEPHONE LINES FOR THE PURPOSE OF SHARING INFORMATION.
  • 3. WHO OWNS THE INTERNET?
    • NO ORGANIZATION, CORPORATION OR GOVERNMENT OWNS OR RUNS THE INTERNET.
    • NO ONE IS IN-CHARGE, BUT THERE ARE ORGANIZATIONS WHICH DEVELOP THE TECHNICAL ASPECTS OF THIS NETWORK AND SET STANDARDS FOR CREATING APPLICATIONS ON IT.
  • 4. HOW INTERNET COMMUNICATE WITH ONE ANOTHER?
    • THEY USE THE TRANSMISSION CONTROL PROTOCOL/INTERNET PROTOCOL (TCP/IP).
    • THEY USE A CLIENT/SERVER ARCHITECTURE.
    • THEY USE SOFTWARE/EQUIPMENTS TO TAKE ADVANTAGE OF THE LATEST ACCESS TECHNOLOGY.
  • 5.
    • AT THE BEGGINNING IT WAS RESTRICTED TO UNIVERSITY SCIENTIFIC RESEACHERS, WHO WERE MOSTLY MEN.
    • BUT NOW, INTERNET GREW, SO PEOPLE OUTSIDE UNIVERSITIES USES INTERNET, THAT RESULTS TO A WORLD WIDE WEB. W.W.W.
    WHO USES THE INTERNET?
  • 6. COMPONENTS OF THE INTERNET
      • WORLD WIDE WEB …is one of the protocols that lets you link to many sites on the Internet. The basic unit is the WEB PAGE ….a page can be one or many screens as it displays on the your monitor.
      • LINKS …those are underlined words that you can click on to get other related web pages.
  • 7. COMPONENTS OF THE INTERNET
      • 2. E-MAIL …Electronic mail, or e-mail, allows computers users locally and world to exchange messages.
      • MIME (Multimedia Internet Mail Extension) is a software that handle a variety of file types that can attach to an e-mail messages.
  • 8. COMPONENTS OF THE INTERNET
      • 3. TELNET …is a program that allows you to log into computers on the Internet and use online databases, library catalogs, chat services.
  • 9.
    • 4. FTP (File Transfer Protocol)..this is both program and the method use to transfer files between computers. It is an option that allows users to transfer files from thousands of host computers on the Internet to their personal computer account.
    COMPONENTS OF THE INTERNET
  • 10.
    • 5. E-MAIL DISCUSSION GROUPS… offers people world wide to communicate via e-mail, because INTERNET is home to a large community of individuals who carry out active discussions organized around topic oriented forums distributed by e-mail.
    COMPONENTS OF THE INTERNET
  • 11.
    • 6. USENET NEWS….is a global electronic board system in which millions of computer users exchange information on a vast range of topics.
    COMPONENTS OF THE INTERNET
  • 12.
    • 7.FAQ, RFC, FYI
    • FAQ (Frequently Asked Questions) periodic posting of USENET news groups that contains wealth of information related to a topic.
    • RFC (Request for Comments) documents created & distributed to the Internet community to help define the nuts and bolts of the Internet.
    • FYI (For your Information) contains information of interest to new internet users.
    COMPONENTS OF THE INTERNET
  • 13. CHAT & INSTANT MESSENGING
    • Chat programs allows users on the internet to communicate with each other by typing in real time.
    • Internet Relay Chat (IRC) is a service through which participants can communicate to each other on hundreds of channels.
    • Instant messenging , a user on the web can contact another user currently logged in and type a conversation.
  • 14. MAJOR PROTOCOLS ACCESIBLE ON THE WEB
    • E-MAIL (Simple Mail Transport Protocol or SMTP)- distributes electronic messages and files to one or more electronic mailboxes.
    • TELNET (Telnet Protocol) –facilitates login to a computer host to execute commands.
  • 15. MAJOR PROTOCOLS ACCESIBLE ON THE WEB
    • FTP (File Transfer Protocol)- transfer text or binary files between an FTP server and client.
    • USENET (Network News Transfer Protocol or NNTP) –distributes Usenet news articles derived from topical discussions on newsgroups.
  • 16.
    • HTTP (Hyper Text Transfer Protocol)-transmits hypertext over networks. This is the protocol of the w.w.w.
    • VoIP (Voice over Internet Protocol)- allows user to place a telephone call over the web.
    MAJOR PROTOCOLS ACCESIBLE ON THE WEB
  • 17. WHAT CAN WE GET IN THE INTERNET
    • E-mail (Electronic Mail)
    • Information
    • Group Discussion
    • Entertainment
    • On Line Shopping
    • Free Softwares
  • 18. RETRIEVING DOCUMENTS ON THE WEB: THE URL
    • URL (Uniform Resource Locator- specifies the Internet address of a file stored on a host computer connected to the Internet. URL are translated into numeric addresses using the DNS (Internet Domain Name System)
  • 19. ANATOMY OF A URL
    • http//www.congress.gov.ph/leadership/index.htm
    protocol host 2 nd Level Domain name Top Level Domain name Directory name File name
  • 20. Top Level Domain Names
    • com - commercial enterprise
    • edu - educational institution
    • gov - government entity
    • mil - military entity
    • net - network access provider
    • org – usually nonprofit organizations
  • 21. TWO LETTER INTERNET COUNTRY CODES Japan jp Philippines ph Germany de United Kingdom uk Switzerland ch