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8613747
Data, Info and Knowledge
Descrição
KS4 ICT Mapa Mental sobre Data, Info and Knowledge, criado por Matthew Stentiford em 21-04-2017.
Sem etiquetas
ict
ks4
Mapa Mental por
Matthew Stentiford
, atualizado more than 1 year ago
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Criado por
Matthew Stentiford
mais de 7 anos atrás
9
1
0
Resumo de Recurso
Data, Info and Knowledge
Advantages of ICT
Less physical storage needed
Stored data is more secure (encrypted)
Can be accessed quicker
Back ups can keep data secure
Easily edited data
Faster processing
fewer staff needed BUT they need ICT skills
Data can be presented in different ways
Data can be stored on a network and be used by any user on that network
Computers transfer data to other computers in secounds
Disadvantages
Expensive equipment
Difficulties to those that do not have good ICT skills
Viruses/hackers can damage data on computer network system
Validation
Batch total
Add numbers up and the computer checks if it is correct, accepts it if it is
Hash total
Same as the batch total but the total has no meaning. i.e checking telephone numbers
Verification
Check that the data received was the same as the data sent
transcription errors
Omissions - leaving data out
Transpositions - typing 1324 instead of 1234
Spelling mistakes
Visual check - looking for errors by human eye
Double keying - entering data twice
Parity check - adds extra binary digit onto the end to make it an even parity. Once received it checks that all binary digits are even
Encoding data
changing "large red bag" to "LR Bag)
Advantages
Less computer memory is used
Easier to enter the data once you know the codes
Fewer errors (more accurate data)
Speed of access to data
Once data is recorded onto device it can be retrieved very quickly
Computers can look through large amounts of data and find answers almost instantly
ICT has improved the services of businesses
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