U 02 Page 1-7 Revision Summary puzzle

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Across
  1. 3. (9) Need to be strong, i.e. mixture of upper and lower caseletters numbers and symbols; at least 8 characters long; changed regularly; doesn’t contain personal data (e.g. names)
  2. 9. (6,9) Used to get internet access from mobile devices such as phones
  3. 11. (4,4,7) Used over a large distance, e.g. to connect together different sites, internet
  4. 12. (5,4,7) Used over a short distance, e.g. within a building
  5. 13. (9,7) Hardware and software can be combined to form a system that can run on its own, A system that uses technology and control systems e.g. traffic lights, central heating system,
  6. 15. (6,6,8) Files stored on a central server and can be accessed from client machines. Their benefits are: Allow centralised control of backups, access rights and resource allocation,Allow for easy file management as all files are stored in the same place, Allow easy upgrades as it only the server needs to be upgraded, New resources can be added centrally
  7. 16. (8,5) Use tiny magnetic spots on disk surface to store data, Disk spins round using circular tracks to organise the magnetic spots, Read/write head moving over the disk surface between tracks
  8. 17. (5,2,6) Different individuals or roles given different levels of access to data, e.g. read, edit
  9. 19. (14) Ways to ensure that the person using the system is the correct person
  10. 20. (7,5) Use laser light to read the surface of the disk Used to install new software and to make backups of hard drives,e.g. CD / DVD / Blu-ray
Down
  1. 1. (15,7) Some modern devices provide both input and output e.g. Touchscreens, Printer & scanner
  2. 2. (10,7) computer is a machine that processes digital data,is the complete collection of components (hardware, software, peripherals, power supplies, communication links) making up a single computer installation.
  3. 4. (4,7,7) e.g. Barcode readers, Magnetic strip readers, Optical mark readers (OMR),Optical Character Reader (OCR), Radio frequency identification systems (RFID)
  4. 5. (7,4,7) Used to connect an individual’s devices such as PC, phone, laptop, tablet. Used to synchronise the different devices.
  5. 6. (7,3,9) Copyright - Legal ownership of data,Person (or organisation) who created data (text, image, music, etc.)owns it
  6. 7. (8,7) programmable digital devices e.g.Washing machines, microwaves, cars, etc.
  7. 8. (8,7)allow you to draw more intuitively than with a mouse and has pressure sensitivity to change the results depending on how hard the user presses
  8. 10. (7,7) Used in shops, warehouses, etc. to scan the pattern of lines in a barcode that relates to a product code
  9. 14. (5,5) Store data on flash memory microchips,Contain transistors that retain their state (on / off) and store data even when no electrical power No moving parts so data can be written to and from much faster than magnetic hard drive, Quieter and more reliable than HDD
  10. 18. (4-7,5) Has Input devices such as barcode reader, touch screen, scales, payment input (cards,coins & notes) etc and Has output devices Output devices: screen, speakers, payment receipt printer, device to give change, etc.