Checksum (molulo-n check, residue check) Definition/Meaning:
A simple error detection method that operates on some set of
information (usually data or program). If this information is in
units that are m bits wide, a sum is taken molulo n, where n = 2m,
and appended to the information. At a later time or different
location the check may be recomputed and most simple (all single)
bit errors will he detected. A
is the simplest version of this check with m = 1 and n = 2.