is chapter 4

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is chapter 4
2011-10-17 01:48:49

is chapter 4
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  1. infrastructure components-provides platform for all info systems in the business
    • hardware
    • software
    • data management
    • technology services
    • networking and telecommunications technology
  2. servers- type of midrange computer
    • types of servers
    • applications
    • databases
    • disk
    • fax
    • mail
    • print
    • web
    • file
  3. supercomputer
    • more sophisticated computer
    • used in engineering, forecasting, military weapons
    • parralel processing-the ability to run two or more tasks using multiple processors
  4. gridcomputing
    virtual supercomputer
  5. processing configuratons
    • centralized-processing done by one large central computer
    • decentralized-division has its own computer for processing
    • distributed-processing power is distributed among several locations
  6. two tiered client/server architecture
    uses two types of machines-a client computer networked to serve a computer
  7. n-tier or multi-tiered client/server architecture
    balances load of network over several levels of servers
  8. computer
    • machine that accepts data as input
    • process data without humans
    • outputs information
  9. HW-physical components
    • CPU
    • primary storage
    • secondary storage
    • communication devices
  10. bit
    the smallest unit of information a computer can process
  11. byte
    a group of right bits
  12. types of binary codes
    • 8 bit
    • ASCII

    • 16 bit
    • unicode
  13. CPU
    central processing unit
    HW that interprets and executes the program(sw)
  14. registers
    provide temporary storage where data resides where its being processed or manipulated
  15. L1 cache memory
    a small block of memory used by the processors to store instructions used recently
  16. machine cycle time
    the time it takes to process one instruction
  17. clock speed
    • measured in hertz
    • speed of the internal clock at which time the operations can proceed
  18. word length
    number of bits that can be processed by the cpu at one time
  19. main memory
    • semi conductor memory chips
    • RAM, ROM
  20. secondary memory
    • saves data when computer is off
    • archival storage
  21. RAM
    the computers primary working memory
  22. cache memory
    a type of high speed memory that the cpu can access faster than memory
  23. ROM
    • read only memory
    • nonvolatile
  24. sequentiel
    • records received in any order
    • SASD
  25. direct
    records can be retrieved in any order also called random access
  26. DVD
    digital video disk
    holds 7 times more capacity than a cd
  27. SAN
    storage area network
    dedicated high speed network used to connect and manage shared storage devices of different types
  28. ergonomics
    designing and positioning computer equipment for employee health and safety
  29. RFID tag
    • small electronic device consisting of chip and antennea
    • can be read from a distance of about 20 feet
  30. cloud computing
    firms and individuals obtain computing resources over the internet
  31. system software
    • controls access to the HW
    • -operating system software
    • -language translators
    • -utility software
  32. application software
    • can provide a variety of tasks; used for specific information processing
    • programming languages
    • business systems
  33. type of system sw
    • assembler-sw program to convert 2nd generation program
    • complier-sw to convert 3rd generation programs
    • interpreter-similar to complier but instead of translataing entire source code, it reads executs one line of source code at a time during operation