The _____ measures the number of lost or garbled messages as a fraction of the…
2023
The _____ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.
- A.
residual error rate
- B.
transfer failure probability
- C.
connection release failure probability
- D.
More than one of the above
- E.
None of the above
Attempted by 441 students.
Show answer & explanation
Correct answer: A
Concept
Network service-quality (QoS) parameters describe how reliably a connection delivers data. Among these, the residual error rate is defined as the fraction of messages that arrive lost or garbled out of the total messages sent, measured over a fixed sampling period. In short, it is an accuracy metric: residual error rate = (lost or garbled messages) / (total messages sent).
Applying it here
The stem describes a metric that counts lost or corrupted messages as a fraction of the total sent during a sampling window. That is precisely the definition of the residual error rate, so the blank is filled by "residual error rate".
Contrasting the near-miss parameters
transfer failure probability: the chance that a data-transfer attempt fails to complete correctly within a stated time limit -- an event-completion measure, not a fraction-of-corrupted-messages measure.
connection release failure probability: the chance that a connection cannot be released (torn down) correctly -- it concerns the teardown phase, not message integrity during transfer.
Because exactly one offered term matches the "lost-or-garbled fraction" definition, the combined choices ("more than one of the above" and "none of the above") do not apply.