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GCSE Computing : Kerim

Kers_Ops Englisch 25 Karten

GCSE Computing : Kerim

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  1. 1HARDWARE KerimHardware is physical .
    CPU,GPU,MOUSE, KEYBOARD, MONITOR
  2. 2SOFTWARE Operating System (OS)Most Important
    Support for other applications
    Windows, Mac, Linux
    Recognises Input Devices
    Sends Outputs
  3. 3SOFTWARE ApplicationPreforms a specific task
    Only comparable with certain OS
    Photoshop, Word, Steam
  4. 4INPUTA input device put information into a computer to be processed.
    Keyboard, Mouse, Microphone
  5. 5OUTPUTA output device takes processed information and outputs it from the computer.
    Monitor, Speakers, Printer
  6. 6INPUT AND OUTPUTThese devices can be both a input and output device.
    Tablet, Headset, Network Card
  7. 7Logic GatesNOT: IF INPUT IS ON OUTPUT IS OFF
    AND: BOTH MUST BE ON
    OR: AT LEAST 1 MUST BE ON    Logic Gates
  8. 8Processor (CPU)Brain of the computer
    CPU does calculations
    Most important element of a computer system
  9. 9NETWORKSComputer networks are connections between nodes that allow data to be exchanged.
    Local Area Network (LAN): Connects Computers close together
    Wide Area Network (WAN): Connects Computers over a large area (Internet)    NETWORKS
  10. 10Advantages of NetworksComputers can share files and data to another computer.
    Printers can be shared and accessed by each computer.
    Data can be stored on a server and can be backed up and accessed by other Computers
  11. 11Disadvantages of NetworksLAN Computers are more likely to have security issues.
    Virus' can spread and computers can be hacked.
    Hardware required to connect LANs can be expensive.
    Technicians needed to maintain
  12. 12Network Hardware (Switch)Switch: Device with many Ethernet ports to connect LAN computers. It forwards packets to the intended destination only using MAC Adresses
  13. 13Network Hardware (Hub)Hub: Packets are sent to everything not just one MAC address
  14. 14Network Hardware (Router)Router: Forwards packets from LAN to ISP then to Internet.
  15. 15Network Hardware (Wireless Access Point)Access Point: This device allows access to a wired connection using Wi-Fi.
    Can be standalone and part of Router making a Wireless Router.
  16. 16Database Management System (DBMS)Instead of storing data on lots of machines we store it on on Database Server.
    This means were all looking at the same data and ensures consistency.
    Lots of applications can use the same software.
  17. 17The Star TopologyMost home networks use this topology as it has a central connection point which could be a Hub, Switch or Router.
    Each Node is connected to the central point.    The Star Topology
  18. 18Advantages of Star TopologyIf one Cable fails the rest can still communicate.
    High performance because there is no data collision
  19. 19Disadvantages of Star TopologyExpensive to install all cables and hardware
    If the Central Device fails then the whole network will.
  20. 20The Ring TopologyEach Device is connected to two other devices. When a message is sent it travels in one direction and is received by each device until it meets it destination.The Ring Topology
  21. 21Advantages and Disadvantages of Ring TopologyNo data collision
    --
    If any cables fail or a device fails the whole network will fail.
    Workstations can see information for intended for them. Security / Privacy Issue.
  22. 22The Bus TopologyAll devices are connected to one cable (the bus). When a node communicates it travels down the bus that all devices receive but only the intended recipient accepts and processes the message.The Bus Topology
  23. 23Advantages of Bus TopologyCheap and easy to install as only a small quantity of cables are needed
    ----
    If the bus fails then the whole network cant communicate.
    The more computers added the slower the network gets.
  24. 24Client-Server NetworkDevices on this network is EITHER a client or server.
    Server: A provider of a service or resource
    Client: A requester of a service from a server
    BOTH NEED EACHOTHER    Client-Server Network
  25. 25Peer-to-Peer NetworkEach device has the ability to be a Server or Client. Wi-Fi use peer-to-peer networks.Peer-to-Peer Network

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Beschreibung
GCSE COMPUTER SCIENCE NOTES OCR BOOK
Erstellt von
Kers_Ops
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6
Verlauf
  • Erstellt von RoryOMoore · 17 Jan 2016
  • Kopiert von Kers_Ops · 17 Jan 2016
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