Transmitting redundant information with each character or frame to facilitate detection and
correction of errors is called a:
feedback error control.
block sum check.
forward error control.
cyclic redundancy check.
Forward error control involves transmitting additional redundant information with each character or
frame to facilitate detection and correction of errors, in feedback error control, only enough
additional information is transmitted so the receiver can identify that an error has occurred. Choices
B and D are both error detection methods but not error correction methods. Block sum check is an
extension of parity check wherein an additional set of parity bits is computed for a block of
characters. A cyclic redundancy check is a technique wherein a single set of check digits is
generated, based on the contents of the frame, for each frame transmitted.