INTERNETPrepared by : Nuwan Darshana              Sri Lanka              nuwaned@gmail.com
INTERNETWhat is the INTERNET ?The Internet is a global system of interconnectedcomputer network.It is a network of network...
What is the INTERNET ?Technically, the "internet" is all the computers in the world that areconnected, including the techn...
Importance of the internet to you.Because of all these things, the "internet" is agigantic library, as well as a world-wid...
Importance of the internet to our organization•"Communication"with other organizations, with your members, with your staff...
•Customer support"the people you are helping through your organization.     Nothing is better than people with people: int...
•Increase credibility•increase exposure•Greater quantity and quality of inquiries.•Increase donations and sales•Reduce cos...
What are the Risks?Here are some of the major risks you and your familyface when using the Internet:   Viewing objectiona...
History of Internet               ARPANETThe ARPANET (Advanced Research ProjectsAgency Network) created by ARPA of the Uni...
ARPANET Logical Map
Timothy Berners-Lee(Tim Berners-Lee)Born           - 8 June 1955 ) (age 54)                 London, EnglandOther names    ...
Network1. LAN – Local Area Network1. MAN – Metropolitan Area Network2. WAN – Wide Area Network
NetworkLAN – Local Area Network
NetworkMAN – Metropolitan Area Network
NetworkWAN – Wide Area Network
INTERNETConnecting through        Connecting through      Cable                     Satellite
Internet Submarine Cable   Repeaters
Internet Submarine Cable Map
SEA - ME – WE             Cable System     Cable Path          - Singapore to France     Cable Length        - 13 500 km  ...
Internet Submarine Cable
Internet Satellite System
How computers are connected to the internet
What Are The Different Methods Of Connecting To            The Internet?There are numerous ways to connect to the Internet...
How to get connected to the Internet ?ComputerModemPhone LineInternet Service Provider (ISP)
Internet Map
Internet Servers
ModemModem (from modulator-demodulator) is a devicethat modulates an analog carrier signal to encodedigital information, a...
Internet ModemExternal Modem
Internet ModemInternal Modem
Internet ModemWireless Modem (USB Modem )
Web BrowsersWhat is a Web Browser ?A web browser is a software application thatretrieves and collects information resource...
The major web browsers    Windows Internet Explorer    Mozilla Firefox    Apple Safari    Google Chrome    Opera.
Internet Explorer interface   Mozilla Firefox interfaceApple Safari interface        Google Chrome interface
Web Search EngineWhat is a Web Search Engine ?A Web search engine is a tool designed tosearch for information on the World...
Search Engine LOGOs
Search Engine                Search Engine
Search Engine                Search Engine
Web Page & Web Site                 Connecting                 to other                 pages
Content of Web Page                                    Web HyperlinksWeb Browser                                      Pict...
Hyperlinks and Web pages
Web Address         http://www.http - Hypertext Transfer Protocolwww - World Wide Web
Tips for ParentsKeep the computer in a shared room so you can see whatthe child is doing online.Ensure children are not ...
Tips for ParentsSet rules about time online (recommended max 2 hours*screen time per day, including TV)Let your children...
THANK YOUPrepared by : Nuwan Darshana             Sri Lanka             nuwaned@gmail.com
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Internet

  1. 1. INTERNETPrepared by : Nuwan Darshana Sri Lanka nuwaned@gmail.com
  2. 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. 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. 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. 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. 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. 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. 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. 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. 10. ARPANET Logical Map
  11. 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. 12. Network1. LAN – Local Area Network1. MAN – Metropolitan Area Network2. WAN – Wide Area Network
  13. 13. NetworkLAN – Local Area Network
  14. 14. NetworkMAN – Metropolitan Area Network
  15. 15. NetworkWAN – Wide Area Network
  16. 16. INTERNETConnecting through Connecting through Cable Satellite
  17. 17. Internet Submarine Cable Repeaters
  18. 18. Internet Submarine Cable Map
  19. 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. 20. Internet Submarine Cable
  21. 21. Internet Satellite System
  22. 22. How computers are connected to the internet
  23. 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. 24. How to get connected to the Internet ?ComputerModemPhone LineInternet Service Provider (ISP)
  25. 25. Internet Map
  26. 26. Internet Servers
  27. 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. 28. Internet ModemExternal Modem
  29. 29. Internet ModemInternal Modem
  30. 30. Internet ModemWireless Modem (USB Modem )
  31. 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. 32. The major web browsers  Windows Internet Explorer  Mozilla Firefox  Apple Safari  Google Chrome  Opera.
  33. 33. Internet Explorer interface Mozilla Firefox interfaceApple Safari interface Google Chrome interface
  34. 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. 35. Search Engine LOGOs
  36. 36. Search Engine Search Engine
  37. 37. Search Engine Search Engine
  38. 38. Web Page & Web Site Connecting to other pages
  39. 39. Content of Web Page Web HyperlinksWeb Browser Picture HyperlinksWeb Address (URL)
  40. 40. Hyperlinks and Web pages
  41. 41. Web Address http://www.http - Hypertext Transfer Protocolwww - World Wide Web
  42. 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. 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. 44. THANK YOUPrepared by : Nuwan Darshana Sri Lanka nuwaned@gmail.com

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