ITPEC IP October 2025 Question 14
ITPEC IP October 2025 — Question 14 of 100
C, B, A — more parallel redundancy increases availability, while required series devices reduce it.
C has three devices in parallel and works if any one works, so it has the highest availability. B requires one series device plus at least one of two parallel devices, giving some redundancy but retaining a single point of failure. A requires both series devices and has no redundancy, so it is lowest.
Answer (d)
Why not others: (a) and (b) place the all-series A too high, while (c) places B below A even though B's parallel pair makes it more available than two devices in series.
Key rule: For identical independent devices, parallel paths improve availability; every component required in series multiplies failure exposure.
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