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Flashcards

Computing Science Paper 1

Sarah Burnett Computing Ks3 English 76 cards

Cards in this deck (76)

  1. 1The Purpose Of The CPUThe CPU processes all of the data and instructions needed in order for the system to work.
  2. 2What Is Meant By A 2GHz ProcessorA processor with a clock speed of 2GHz can carry out two billion fetch, decode and execute cycles per second.
  3. 3What Is Meant By A Quad Core CPUA quad core CPU means the processor has four independent cores that read and execute CPU instructions.
  4. 4The Purpose Of Cache In A CPUStores regularly used data so that the CPU can access it quickly the next time it is needed.
  5. 54 Main Registers That Are Used By Von Neumann Architecture1. The Program Counter (PC)
    2. The Accumulator
    3. The Memory Address Register (MAR)
    4. The Memory Data Register (MDR)
  6. 6Define An Embedded SystemA computer built into another device. for example a dish washer, Microwave and washing machine
  7. 7Advantages Of Embedded Systems1. Easy to design
    2. Cheap to produce
    3. Dedicated to a single task making them more efficent
  8. 8How Can Cache Improve the Performance of the CPUIt is faster access memory than RAM, since it is on the same chip as the processor, The more cache the CPU has, the less time the computer spends accessing slower main memory and as a result programs may run faster.
  9. 9How Can Increasing The Clock Speed Improve The Performance Of The CPUThe higher the clock speed, the greater the number of instructions that can be carried out per second.
  10. 10What Is The Task Of The Control UnitIt is the overall control of the CPU, it executes program instructions by following the fetch, decode and execute cycle. It controls the flow of data inside and outside of the CPU.
  11. 11What Is The Task Of The Arithmetic Logic UnitIt completes simple addition and subtraction, compares the size of numbers and can do multiplications and divisions using repeated addition and subtraction. It preforms logic operations such as AND, OR and NOT as well as binary shifts.
  12. 12What Is The Purpose Of The Program Counter (PC)It hold the memory address of the instructions for each cycle
  13. 13What Is The Purpose Of The AccumulatorIt stores intermediate results of calculations in the ALU
  14. 14What Is The Purpose Of The Memory Address Register (MAR)It holds any memory ADDRESS about to be used by the CPU. The address might point to data or a CPU instruction
  15. 15What Is The Purpose Of The The Memory Data Register (MDR)It holds the actual data or instructions. This may have been fetched from memory, or be waiting to be written to memory.
  16. 16What Is The Difference Between RAM And ROMRAM is volatile (temporary) data whereas ROM is non-volatile (permanent).
    RAM can be read and written to whereas ROM can only be read.
  17. 17What Is The Purpose Of RAMRAM is used as the main memory in a computer.
  18. 18What Is The Purpose Of ROMIt contains all of the instructions a computer needs to properly boot up. These instructions are called the BIOS (Basic input output system)
  19. 19What Is The Purpose Of Virtual MemoryWhen the RAM is full, the computer moves data that is not in current use to a location in secondary storage known as virtual memory.
  20. 20Why Is RAM More Efficient Than Virtual MemoryRAM is a lot faster than virtual memory.
  21. 21What Is Secondary StorageIt is where Non volatile storage of data is kept while it is not in use
  22. 22What Are The Three Main Storage Technologies1 - Primary Storage
    2 - Secondary storage
    3 - Tertiary storage
  23. 23What Are Six Characteristics Of Secondary Storage Devices That You Should Consider When Choosing A Device-speed (how quickly data can be accessed)
    -cost per storage unit (i.e. price per gigabyte or megabyte)
    -durability (toughness)
    -portability (how easy it is to move it from one computer to another)
    -Noise
    -whether it needs defragmentation
  24. 24What Is Flash MemoryFlash memory is a non-volatile type of storage that can be written to and overwritten.
  25. 25What Are The Advantages And Disadvantages Of Solid State StorageAdv - Fast
    -Durable
    -Do not require defragmenting
    -Silent
    Dis - Expensive
  26. 26What Are The Advantages And Disadvantages Of Magnetic StorageAdv - Cheap
    - high capacity
    - long read/write life
    Dis - not durable
    - requires defragmentation
    - noisy
    - not as fast as SSD
  27. 27What Are The Advantages And Disadvantages Of Optical Storage.Adv - Cheap
    - portable
    - resistant to water and shock
    Dis - can be scratched
    - not as widely used
    - low capacity
    - low read/write speeds
  28. 28What Is A Local Area NetworkA LAN is a network of devices that covers a small geographical area, located on a single site.
  29. 29What Is A Wide Area NetworkA WAN is a network thst connects LANs that are in different geographical locations
  30. 30What Is The Role Of A Personal Computer In A Client Server Network
  31. 31What Is The Role Of A Server In A Client Server Networkc
  32. 32What Is A Peer To Peer Networkc
  33. 33What Is A Client Server Networkc
  34. 34What Are Five Items Of Hardware Which Can Be Used To Create A Local Area Networkd
  35. 35What Are The Advantages Of Using Cloud Storagef
  36. 36What Are The Disadvantages Of Using Cloud Storagef
  37. 37What Is An Example Of A URLd
  38. 38What Is An Example Of An IP Addressd
  39. 39What Is The System That Matches URLs To IPs On The Webc
  40. 40What Is Difference Between A URL And An IP Addressc
  41. 41What Is One Benefit Of Using URLs to Access Websites Instead Of IP Addressese
  42. 42What Are The Differences Between A Client Server And A Peer To Peer Networkc
  43. 43What Is The Purpose Of A Router On A Local Area Networkc
  44. 44What Is A Virtual Network
  45. 45what are factors that could effect the performance of a network
  46. 46What Are Advantages Of Using A LAN1. Software can be installed and updated on all computers at once
    2. User accounts can be stored centrally so users can log in from any device.
    3. The same hardware can be shared i.e printers.
    4. all devices can share a internet connection.
  47. 47What Are The Network Hardware Devices That can be used to support wifi connections.
  48. 48how Is A DNS server used to access a websited
  49. 49What Are Advantages Of Using A DNS server to access a website
  50. 50Benefits Of A Virtual Network1. Several Virtual networks can exist on a physical network.
    2. Each virtual network has it's own security
    3.
  51. 51Advantages And Disadvantages Of A Star networkAdv - If a device fails or a cable is disconnected the rest of the network is unaffected
    Dis - If there is a problem with the switch or server the whole network is affected.
  52. 52Advantages And Disadvantages Of A Mesh networkAdv - There is no signal point where the network can fail. if one device fails then the data is sent along a different route to get to it's target
    Dis - A lot more expensive to implement than other topology's
  53. 53How Can A Wifi Connection Be Secured
  54. 54What Is the frequency of a wifi signal
  55. 55Why Are Different Wifi Channels AvailableWifi performance is affected by interference between networks using adjacent wifi channels. Different wifi channels are available so certain channels that are spaced apart can be used to avoid wifi problems.
  56. 56What are factors that can affect the signal strength of a wifi connection1. Bandwidth
    2. Range
    3. Physical Obstructions
  57. 57What Are the events of packet switching
  58. 58What Is A Network ProtocolA set of rules for how devices communicate and how data is transmitted across a network
  59. 59What is HTTP used forIt is used by web browsers to access websites and communicate with web servers
  60. 60What is HTTPS used forIt is used by web browsers to access websites and communicate with web servers while encrypting all information sent and received
  61. 61What Is FTP Used ForIt is used to access, edit and move files between devices on a network
  62. 62What Is POP3 Used forIt Is Used to retrieve emails from a server. The Server Holds the email until you download it, at which point it is then deleted from the server
  63. 63What Is IMAP Used ForIt Is Used retrieve emails from a server. The Server Holds The Email until you delete it, you only download a copy.
  64. 64What Is SMTP Used forUsed To Send Emails, Also used to transfer emails between servers
  65. 65What Is The Role Of TCPTCP sets the rules for how devices connect on the network. It's in charge of splitting data into packets and reassembling the packets back into the original data once it reaches the receiving device. It also checks if the data is correctly sent and delivered
  66. 66What Is The Role Of PIt Is responsible for packet switching.
  67. 67What Is A Protocol LayerA group of protocols with similar functions. each layer is self contained meaning they do their job without needing to know what is happening in other layers. Each layer serves the layer above it.
  68. 68What Does Layer 4 coverThe Application layer turns data into websites and other applications and vice versa.
  69. 69Layer 4 protocolsHTTP, HTTPS, FTP, SMTP
  70. 70What Does Layer 3 CoverThe transport layer controls data flow, e.g. splitting data into packets and checking packets are correctly sent and delivered
  71. 71Layer 3 ProtocolsTCP
  72. 72What does layer 2 coverThe Network Layer Makes Connections between networks, directing data packets and handling traffic. It is used by routers
  73. 73Layer 2 protocolsIP
  74. 74what does Layer 1 coverThe Data Link Layer passes data over the physical network. It Is Responsible for how bits are sent as electrical signals over cables. wireless and other hardware
  75. 75Layer 1 protocolsEthernet
  76. 76What are the advantages of using layers to construct network protocolst

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Ks3 Computing Flashcards on Computing Science Paper 1, created by Sarah Burnett on 24/02/2020.
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Sarah Burnett
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