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Internet
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Internet
Internet
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Internet
Internet
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Internet

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  • 1. INTERNETPrepared by : Nuwan Darshana Sri Lanka nuwaned@gmail.com
  • 2. INTERNETWhat is the INTERNET ?The Internet is a global system of interconnectedcomputer network.It is a network of networks that consists of millions ofprivate and public, academic, business, and governmentnetworks of local to global scope that are linked by copperwires, fiber-optic cables, wireless connections, and othertechnologies.
  • 3. What is the INTERNET ?Technically, the "internet" is all the computers in the world that areconnected, including the technologies (routers, servers, etc (which are alsocomputers actually) as well as the wires and antennas that keep all thecomputers talking to each other.So the "internet" is not just your web email. It is everything that goes overthose wires from one computer to another: the email itself, web sites,messenger (such as Yahoo Messenger or MSN Messenger), phone callson Skype, messages from an ATM to a bank, ...The words "Internet" and "Web" are often used interchangeably. Strictlyspeaking, the "Internet" would be everything that goes between computers,and the "Web" would be ... websites.
  • 4. Importance of the internet to you.Because of all these things, the "internet" is agigantic library, as well as a world-wide messageboard, telephone network, and publishing medium. Itis open 24 hours a day, and you can find anythingyou want there, and say anything you want.
  • 5. Importance of the internet to our organization•"Communication"with other organizations, with your members, with your staff, with your supporters anddonors. some great ways: letters, phone calls, faxes, meetings additional ways: email, messenger, web pages, mail lists, web site message boards•"Publishing" your message to the world. some great ways: books, journals, brochures, press releases, workshops, conferences, lectures. additional ways: website with conference proceedings, PDF files of your publications, blogs, newsfeeds
  • 6. •Customer support"the people you are helping through your organization. Nothing is better than people with people: interviews, workshops, conferences, classes. additional ways can help them when you arent there: email, messenger, web pages, mail lists, web site message boards. With video-conferencing, podcasting and other great web tools, you can even have workshops and classes online.•"Research"on the news, issues, papers and literature relevant to your cause. some great ways: books, magazines, journals, papers
  • 7. •Increase credibility•increase exposure•Greater quantity and quality of inquiries.•Increase donations and sales•Reduce cost per contact•Increased access to your information•Save on printing costs• Reduce phone usage and staff load.•educe postage, express mail and courier service, andphone costs.•increase your "green rating".
  • 8. What are the Risks?Here are some of the major risks you and your familyface when using the Internet:  Viewing objectionable material  Meeting someone online  Losing privacy  Losing time  Finding false information
  • 9. History of Internet ARPANETThe ARPANET (Advanced Research ProjectsAgency Network) created by ARPA of the UnitedStates Department of Defense during the ColdWar, was the worlds first operational packetswitching network, and the predecessor of theglobal Internet. ARPANET Started In Late – 1970
  • 10. ARPANET Logical Map
  • 11. Timothy Berners-Lee(Tim Berners-Lee)Born - 8 June 1955 ) (age 54) London, EnglandOther names - TimEducation - The Queens College, OxfordOccupation - Computer ScientistEmployer - World Wide Web Consortiumand University of SouthamptonKnown for - Inventing the World Wide WebTitle - Professor
  • 12. Network1. LAN – Local Area Network1. MAN – Metropolitan Area Network2. WAN – Wide Area Network
  • 13. NetworkLAN – Local Area Network
  • 14. NetworkMAN – Metropolitan Area Network
  • 15. NetworkWAN – Wide Area Network
  • 16. INTERNETConnecting through Connecting through Cable Satellite
  • 17. Internet Submarine Cable Repeaters
  • 18. Internet Submarine Cable Map
  • 19. SEA - ME – WE Cable System Cable Path - Singapore to France Cable Length - 13 500 km Connected Countries - 7 Launched on - 08th September 1986South - East Asia - Middle East - Western Europe Cable System
  • 20. Internet Submarine Cable
  • 21. Internet Satellite System
  • 22. How computers are connected to the internet
  • 23. What Are The Different Methods Of Connecting To The Internet?There are numerous ways to connect to the Internet. Hereare the more obvious ones:Direct connection, by using a computer that is permanently plugged into theInternet.By phone line. This may be by dial-up or ADSL, but still uses a phone line.By cable. This facility is provided by a cable-TV supplier.In a wireless hotspot.By satellite. It is possible to have two-way satellite Internet communicationsnowadays, but it is quite expensive.
  • 24. How to get connected to the Internet ?ComputerModemPhone LineInternet Service Provider (ISP)
  • 25. Internet Map
  • 26. Internet Servers
  • 27. ModemModem (from modulator-demodulator) is a devicethat modulates an analog carrier signal to encodedigital information, and also demodulates such acarrier signal to decode the transmittedinformation. Modulator Demodulator - MODEM
  • 28. Internet ModemExternal Modem
  • 29. Internet ModemInternal Modem
  • 30. Internet ModemWireless Modem (USB Modem )
  • 31. Web BrowsersWhat is a Web Browser ?A web browser is a software application thatretrieves and collects information resourcesand arranges and displays the Internetresources on the computer screen.
  • 32. The major web browsers  Windows Internet Explorer  Mozilla Firefox  Apple Safari  Google Chrome  Opera.
  • 33. Internet Explorer interface Mozilla Firefox interfaceApple Safari interface Google Chrome interface
  • 34. Web Search EngineWhat is a Web Search Engine ?A Web search engine is a tool designed tosearch for information on the World WideWeb.
  • 35. Search Engine LOGOs
  • 36. Search Engine Search Engine
  • 37. Search Engine Search Engine
  • 38. Web Page & Web Site Connecting to other pages
  • 39. Content of Web Page Web HyperlinksWeb Browser Picture HyperlinksWeb Address (URL)
  • 40. Hyperlinks and Web pages
  • 41. Web Address http://www.http - Hypertext Transfer Protocolwww - World Wide Web
  • 42. Tips for ParentsKeep the computer in a shared room so you can see whatthe child is doing online.Ensure children are not using mobiles devices in theirrooms when they should be sleeping.Ensure that your child knows the dangers of giving outpersonal information over the web and never does this.Talk to your kids, make sure they know the risks, getinvolved with your childs life online, learn with your child.
  • 43. Tips for ParentsSet rules about time online (recommended max 2 hours*screen time per day, including TV)Let your children know that not everything they read online istrue. That goes for people in chat rooms and virtual worlds too,as people are not always who they say they are.Dont allow them to share personal pictures of themselves orothers with strangers. Make sure that older children thinkabout the consequences of their online actions and their onlinereputation.
  • 44. THANK YOUPrepared by : Nuwan Darshana Sri Lanka nuwaned@gmail.com

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