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Information systems

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									 Demonstrate knowledge of Basic computer technology,
hardware, software and networks and their application in
                   the business field




                   School of Business and Finance
School of Business and Finance
Hardware Internal
 Hardware are the components of the computer system.
   Motherboard
   Central Processing Unit
   Internal Cabling
   Cards (Sound, video, Video Capturing)
   RAM (Random Access Memory)
   Storage (Hard Disks, Magnetic tape)
   Power Supply




             School of Business and Finance
Motherboard
 All components are connected to the motherboard
 either externally or internally.




               School of Business and Finance
Central Processing Unit (CPU)
 All calculations, processes and manipulation of data
 are executed within the central processing unit.




              School of Business and Finance
Internal Cards
 Upgrades of sound and graphics require an extension
 card which slots into the motherboard, thereby
 creating a more effective system.




              School of Business and Finance
Random Access Memory (RAM)
 Holds data that is open on a computer.
   It holds:
       The program that is open
       The file that is open
       It is volatile which means when the power is lost the data is
        lost. Therefore SAVE to the hard disk reqularly.




                  School of Business and Finance
Storage
 Hard Disk
   Single or Multiple depending on the size of the work
    being handled.
   Everyday use
   Backup
 Magnetic Tapes
   Archiving of past records.




               School of Business and Finance
Power Supply
 Supplies the power to all the components within the
 system




              School of Business and Finance
Hardware External
 External Hardware is purchase separately and
 connected externally.
   USB connected devices
       USB stick
       Printers
       Scanners
       Keyboard
       Mouse




                    School of Business and Finance
Software
 Software Categories:
    Operating Systems
       Enable the computer to work by signals being sent back and
        forth between hardware to ensure it is all communication
        correctly.
   Types of Operating Systems
       Windows XP, Vista
       Mac OS
       Linux



                  School of Business and Finance
Software           cont


  Applications
      Add on programs purchased separately
  Types of Applications
      Microsoft Office Package
        Word, PowerPoint, Excel etc

      Adobe Productions
        Photoshop, Dreamweaver etc

      Applications downloaded from the Internet
        Irfanview etc




                School of Business and Finance
School of Business and Finance
Media
    Media are the tools used for storing and
     transmitting both data and information in a
     communication system.
    We have looked at media used for storing
     within a computer.
    Some external storage media are:
      DVDs and CDs
      Floppy Disks
      USB sticks



           School of Business and Finance
Network Media
 Common carriers
    Telephone lines
    Cabling (cat 5e / cat 6)
        Transmission rate of 10/100/1000Mps
    Optical fibre
        Much faster used across long distances




                   School of Business and Finance
                   Norton p 353




                                         Norton p 353




                          Norton p 354




School of Business and Finance
Equipment
 Basic equipment required for a network are:
    Computers (workstation / node)
    Switches that directs the information to the correct
     address
    Routers allow the information to travel between
     networks




                School of Business and Finance
Equipment Cont
     A Modem (short for Modulate/demodulate)
     permits access to the telephone lines.
        Converts the signal from digital to analogue and back
         again.
        Telephone lines are analogue will a computer is
         digital




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         Area Network
Local more computers connected together.
 Two or
 Two computers can be connected directly by
  cable only.
 Three or more computers:
   Network Interface Cards (NIC)
   A switch
   Other devices if going outside the office.
 All Networks requiring sharing of data to be
  established.




        School of Business and Finance
Network Addressing
 Each cards unique identifier is called the MAC address
 (Media Access Control)
   Provided by the manufacturer
 Each computers unique identifier is called the IP
 address. (Internet Protocol)
   Provided by the Internet service provider




               School of Business and Finance
LAN range
 A local area network is limited in range. Usually
  within a building or buildings in close proximity
 LANs usually use star or hybrid topologies (Lesson 1)




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Types of LANs
 Cabled
 Wireless
   Wireless is growing in popularity.
   Is being developed that speeds that could challenge
    cabled LANs.




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Wide Area Network (WAN)
 Reaches a wide geographical range
    Interstate
    Overseas
 The Largest WAN is the Internet (many small
 networks joined together sharing data and
 information)




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Methods of connection
    Early days
       Network cards, modems and Telephone lines
          Interfered with voice conversations.
      DSL (Digital Subscriber Lines)
        Still used telephone lines but did not interfere with
         voice
      ADSL (Asymmetric Digital Subscriber Lines)
        Used cabling and was faster than dial up

      SDSL (Symmetrical Digital Subscriber Lines)
        Supplied fast speeds and equal upload and download
         times.


             School of Business and Finance
Network considerations
 Steps to avoid unauthorised access
    Firewalls
       Between you and the external world
       May be considered between internal sections also.




                  School of Business and Finance
You are now able to complete
Part C of the first assignment.
Next weeks class is available for
you to work on the assignment




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