H31-341_V2.5 · Question #821
The number of network elements (including REG) in the two-fiber bidirectional multiplex section shared protection ring may exceed 16.
The correct answer is A. True. Option A is correct because while ITU-T G.841 recommends a maximum of 16 network elements for a two-fiber bidirectional multiplex section shared protection ring (2F-BMSPR), this figure is a practical guideline - not an absolute hard technical limit. The 16-node recommendation…
Question
The number of network elements (including REG) in the two-fiber bidirectional multiplex section shared protection ring may exceed 16.
Options
- ATrue
- BFalse
How the community answered
(50 responses)- A78% (39)
- B22% (11)
Explanation
Option A is correct because while ITU-T G.841 recommends a maximum of 16 network elements for a two-fiber bidirectional multiplex section shared protection ring (2F-BMSPR), this figure is a practical guideline - not an absolute hard technical limit. The 16-node recommendation stems from APS (Automatic Protection Switching) protocol overhead constraints and ring management complexity, but vendor implementations and extended standards can support ring topologies that exceed this number.
Option B is wrong because it incorrectly treats the 16-node figure as a strict, inviolable ceiling when it is actually a standard recommendation that can be surpassed in practice.
Memory tip: Think of 16 as the "recommended speed limit," not a physical road barrier - traffic (nodes) can go beyond it, but the standard advises staying at or under 16 for optimal performance and reliability.
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