Multiple choice Which of the following refers to term ''residual error rate''? Number of bits error per 24 hrs of continuous operation on an asynchronous line Probability that one or more error will be undetected when an error detection scheme is used Probability that one or more error will be detected when an error detection mechanism is used S/N ratio divided by ratio of energy per bit to noise per Hertz Reveal answer Fill a bubble to check yourself B Correct answer Explanation Residual error rate is the probability that errors escape detection despite error detection mechanisms. Option B correctly defines this as undetected errors, while C describes detected errors (detection rate, not residual).