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Transmitting redundant information with each character or frame to facilitate detection and correction of erro

Transmitting redundant information with each character or frame to facilitate detection and
correction of errors is called a:

PrepAway - Latest Free Exam Questions & Answers

A.
feedback error control.

B.
block sum check.

C.
forward error control.

D.
cyclic redundancy check.

Explanation:

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.


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