6.2 Data integrity Flashcards

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1
Q

Data integrity

A

the accuracy, completeness and consistency of data

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2
Q

Validation

A

method used to ensure entered data is reasonable and meets certain input criteria

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3
Q

Verification

A

method used to ensure data is correct by using double entry or visual checks

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4
Q

Check digit

A

additional digit appended to a number to check if entered data is error free

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5
Q

Modulo-11

A

method used to calculate a check digit based on modulus division by 11

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6
Q

Checksum

A

verification method used to check if data transferred has been altered or corrupted, calculated from the block of data to be sent

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7
Q

Parity check

A

method used to check data has been transferred correctly that uses even or odd parity

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8
Q

Parity bit

A

an extra bit found at the end of a byte that is set to 1 if the parity of the byte needs to change to agree with sender or receiver protocol

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9
Q

Odd parity

A

binary number with an odd number of 1-bits

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10
Q

Even parity

A

binary number with an even number of 1-bits

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11
Q

Parity block

A

horizontal and vertical parity check on a block of data being transferred

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12
Q

Parity byte

A

additional byte sent with transmitted data to enable vertical parity checking (as well as horizontal parity checking) to be carried out

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13
Q

Automatic repeat request (ARQ)

A

a type of verification check

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14
Q

Acknowledgement

A

message sent to a receiver to indicate that data has been received without error

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15
Q

Timeout

A

time allowed to elapse before an acknowledgement is received

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