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H31-341_V2.5 · Question #95
H31-341_V2.5 Question #95: Real Exam Question with Answer & Explanation
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Question
After a certain distance of transmission in the WDM system, the optical signal-to-noise ratio of the signal at the receiving end will decrease to a certain extent. The most important reasons are?
Options
- AFiber attenuation is too large
- BUse of demultiplexer
- CUse of EDFAs
- DNo new fiber optics are used
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