Check sum Flashcards

1
Q

Checksum

A
  • Method of checking if data has been transmitted correctly
  • Data is sent in blocks and an additional value is placed at the end of the block
  • A value is calculated from the data and sent with the data
  • Data is recalculated at the receivers end and compared with original checksum to identify error
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2
Q

Echo Check

A
  • When data is sent, this data is sent back again to the sender for confirmation.
  • Sender compares the two sets to check if any errors occured
  • not reliable
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