H31-341_V2.5 · Question #891
According to the recommendation of ITUT, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of network elements on the entire ring network is…
The correct answer is B. False. Option B (False) is correct because the statement contains a subtle but critical error in the threshold: ITU-T G.841 specifies that the 50ms MSP (Multiplex Section Protection) switching time requirement applies to rings with 16 or fewer nodes (≤16), not fewer than 16 (<16) as…
Question
According to the recommendation of ITUT, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of network elements on the entire ring network is less than 16.
Options
- ATrue
- BFalse
How the community answered
(25 responses)- A24% (6)
- B76% (19)
Explanation
Option B (False) is correct because the statement contains a subtle but critical error in the threshold: ITU-T G.841 specifies that the 50ms MSP (Multiplex Section Protection) switching time requirement applies to rings with 16 or fewer nodes (≤16), not fewer than 16 (<16) as the question claims. A ring with exactly 16 nodes still falls within the standard's guaranteed switching time condition.
Option A (True) is wrong because accepting the statement as-is would exclude rings with exactly 16 nodes from the 50ms guarantee, which contradicts the actual ITU-T specification - a ring of precisely 16 nodes is within scope.
Memory tip: Think "sweet 16 is still in" - a ring of exactly 16 nodes is included in the 50ms protection switching guarantee. The boundary is at most 16, so the word "less" in the question is the trap word to watch for.
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