Lan And Wan

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Part of Modul 1 ECDL

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Lan And Wan

  1. 1. Introduction to the PC and Information Technology
  2. 2. Hardware
  3. 3. Software
  4. 4. The Components of a Computer <ul><li>The CPU </li></ul><ul><li>Memory </li></ul><ul><li>Control Devices </li></ul>
  5. 5. The Components of a Computer <ul><li>Keyboard </li></ul><ul><li>Monitor </li></ul><ul><li>Mouse </li></ul>
  6. 6. The Components of a Computer <ul><li>Hard Disk </li></ul><ul><li>Floppy Disk Drive </li></ul><ul><li>CD-ROM </li></ul>
  7. 7. Storage and Memory <ul><li>Permanent </li></ul><ul><li>Temporary </li></ul><ul><li>Primary </li></ul><ul><li>Secondary </li></ul>
  8. 8. Keyboard Tab, Caps Lock Shift Ctrl Qwerty Keyboard Function Keys Numeric Pad
  9. 9. Printers
  10. 10. LAN Local Area Network Server Client
  11. 11. WAN Wide Area Network Dublin LAN Cork LAN ISDN ADSL Connection Telephone Line Server Client Server Client
  12. 12. Internet Uses <ul><li>World Wide Web - a distributed information system </li></ul><ul><li>Electronic Mail - exchange of messages via inter-connected computers </li></ul><ul><li>FTP - a facility to send and receive data from computer to another computer </li></ul><ul><li>Newsgroups - global ‘discussion’ groups where anyone can join in </li></ul>
  13. 13. LAN ( Local Area Network) <ul><li>Area Covered - a local area network is usually confined to a building, in general no extremity is more than 1Km from the other extremity </li></ul><ul><li>Hardware - users of the network generally use PC’s to process their work </li></ul><ul><li>Speed - the speed of data transmission within the network environment </li></ul><ul><li>Resource Sharing - Printers, back-up devices and disk storage </li></ul><ul><li>Data Integrity - there is a low incidence of data corruption to data travelling within the network environment </li></ul>
  14. 14. The Internet: A global network of computers
  15. 15. Internet Communications
  16. 16. E-mail Addresses <ul><li>An Internet E-mail address has the following format: </li></ul><ul><li>[email_address] </li></ul><ul><li>The name part describes the recipients name. The location part describes the location (computer) to which the Email messages should be sent. This follows a similar convention to that of URL addresses, combining country, type of institution and city. </li></ul><ul><li>An example address is: [email_address] </li></ul>

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