In which two ways will you leverage a wavelength-switched optical network solution in your network design?

You are designing an optical network. Your goal is to ensure that your design contains the highest degree of resiliency.

In which two ways will you leverage a wavelength-switched optical network solution in your network design? (Choose two.)
A . a wavelength-switched optical network assigns routing and wavelength information
B . a wavelength-switched optical network takes linear and nonlinear optical impairment calculation into account
C . a wavelength-switched optical network guarantees restoration based strictly on the shortest path available
D . a wavelength-switched optical network eliminates the need for dispersion compensating units in a network

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Answer: A,B