Information technology


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Information technology

  2. 2. Basic Information Technology Concept Information technology - the use of modern technology to aid the capture, storage, retrieval, analysis, and communication of information. The various methods of delivering information are by the use of data, text, image, and voice for personal or organization needs.
  3. 3. Evolving more rapidly than Industrial Age Will continue into the current century Information Age
  4. 4. Cornerstones of our Economy Land Labor Capital Information Forging a Computer-Based Society:
  5. 5. Jobs From physical to mental From muscle-power to brain-power Forging a Computer-Based Society:
  6. 6. A Computer in Your Future Where used? Bank withdrawal Supermarket Drive the car Do I need a Personal Computer? Campaign: One Home, One PC Many more use at work Will I use a computer in my future career? Almost every job will involve use of a computer Video: Future of Information Technology
  7. 7. How a Computer System Works – cont. Software - The instructions needed to direct the computer to complete specific tasks. The CPU follows the step-by-step instructions in a program to complete the tasks from user. Operating system is the system software that controls the basic, low-level hardware operations and file management.
  8. 8. Microcomputers Also known as personal computers Physical sizes : palmtop, desktop and tower case Cheaper and smaller in size Minicomputer Also known as departmental computers Physical sizes : small to large cabinets S upport business application Computer Configuration and Classification
  9. 9. Internet Collection of networks No ownership No central source for services available No comprehensive index of what information is available Individuals Businesses Organizations Libraries Research labs Government Connects Everyone!
  10. 10. Getting Connected User’s computer must connect to a server Server must communicate using TCP/IP The user can purchase access to a server from an ISP (Internet Service Provider)
  11. 11. Internet – What Can You Do? WWW – World Wide Web FTP – File Transfer Protocol E-mail UseNet IRC – Internet Relay Chat Bulletin Boards
  12. 12. World Wide Web Browser – program that allows the user to move around and explore the Internet Use the mouse to point and click on text and graphics Web page Web site Home page
  13. 13. Classifications of Computers Use the computer that fits your needs Based upon Size Speed Cost Portability Number of simultaneous users supported Available software Typical use
  14. 14. Personal Computers Other names PC Microcomputer Home computer Categories Low-end functional Fully powered Workstations Net computer or net box (Web TV) Desktop Models
  15. 15. Notebook Computers Portable Lightweight Fits in a briefcase Battery operated Laptop Larger Heavier More expensive that desktop models
  16. 16. Handheld Computers Personal Digital Assistant (PDA) Scheduling Addresses Handwritten input May offer wireless e-mail and fax PDA Phone More power than PDA Cellphone, GPS, MP3/MP4, Camera, Video, TV, Radio etc. Runs various type softwares, serving various applications
  17. 17. Other Types of Computers Mainframes High speed More expensive Used to process large amounts of data quickly Support multiple users Does server tasks Supercomputers Fastest speed Most expensive
  18. 18. Network : Computers connected together to communicate among themselves. Resource Sharing File Sharing Communication PCs’ Administration and Security Why Network?
  19. 19. - Computer network technology can be classified by the distance the network technology is designed to span - There are three types of networking : Local Area Network (LAN) Metropolitan Area Network (MAN) Wide Area Network (WAN) COMPUTER NETWORKING –cont.
  20. 20. Local Area Network (LAN) - Relatively small refers to the transmission media and computer hardware - The area is not exceeding 10 KM - It only uses one type of transmission medium - It share resources within building or campus COMPUTER NETWORKING –cont.
  21. 21. Metropolitan Area Network (MAN) - The network is larger compared to LAN - The area covers a city of 10 to 100KM - It requires efficient hardware and transmission media to cover these areas COMPUTER NETWORKING –cont.
  22. 22. Wide Area Network (WAN) - The network is larger than MAN and LAN - It interconnect LAN of opposite sides of country or around the world - It covers huge geographical area in the world COMPUTER NETWORKING –cont.
  23. 23. Local Area Network Local Area Network Router Multiplexer Multiplexer Modem Modem Front end Processor Host Computer
  24. 24. Star Ring Bus