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4A0-255 Exam Dumps - Nokia Advanced Optical Network Design

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4A0-255 Questions and Answers

Question # 1

Refer to the exhibit that shows a demand matrix, a network topology with candidate links (in thick bluelinesand dashed lines), the definednetwork in thick blue lines and the demand routing (colored numbers in the figure). Every link is 80 km long. Which of the following requirements is supported by this network design with the displayed demand routing?


1+1 protection


Minimum cost design


Minimum latency


Resilience against two link faults

Question # 2

Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?









Question # 3

Which of the following best describes Four Wave Mixing (FWM)?


FWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.


FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.


FWM is a non-linear impairment resulting from varying velocities at different frequencies.


FWM is a linear impairment resulting from pulses broadening over ultra-longdistances