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Parity
Parity is a method by which a check
bit is added to data so that errors can be detected. Computer data
is organized into bytes that consist of 8 bits. These bits a re transmitted
serially as 1's and 0's. The simplest form of parity is referred to
as Even Parity or Odd Parity. This method adds an ad-ditional
bit to each byte to indicate whether the number of 1's in the byte is
an even or odd number. If the number of bits received does not match
the parity bit, an error is indicated. This simple parity check can
only detect er-rors. It cannot correct them. The only way to correct
the error is to retransmit the data. Error correction requires more
sophisticated calcula-tions or additional bits to provide data transmission
that is protected and recoverable.
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CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005
Adapted with permission from a work created by Tcat Houser et al.
CertiGuide.com Version © Copyright 2005 Charles M. Kozierok. All Rights Reserved.
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