8613747
Description
Mind Map by Matthew Stentiford, updated more than 1 year ago
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Created by Matthew Stentiford
over 7 years ago
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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 presented
in different ways
- fewer staff needed BUT
they need ICT skills
- Faster processing
- Data can be stored on a network and be used by any user on that network
- Computers transfer data to other computers in
secounds
- Less physical storage needed
- Disadvantages
- Expensive equipment
- Difficulties to those
that do not have
good ICT skills
- Viruses/hackers
can damage data
on computer
network system
- Expensive equipment
- Validation
- Batch total
- Add numbers up and the
computer checks if it is
correct, accepts it if it is
- 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
- Same as the batch total but
the total has no meaning. i.e
checking telephone numbers
- Batch total
- 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
- Spelling mistakes
- Transpositions - typing 1324 instead of 1234
- Omissions - leaving data out
- 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
- 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
- Double keying - entering data twice
- Check that the data
received was the
same as the data sent
- 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)
- Fewer errors (more accurate data)
- Easier to enter the data once you know the codes
- Less computer memory is used
- Advantages
- changing "large red bag" to "LR Bag)
- 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
- ICT has improved the services of businesses
- Once data is recorded onto device
it can be retrieved very quickly
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