Which of the following board configurations for ROADM nodes are correct? (Multiple choice)

Which of the following statements about signal label byte C2 are incorrect?

If a weak signal light and a strong pump light are transmitted simultaneously in an optical fiber, and the wavelength of the weak signal light is within the Raman gain bandwidth of the pump light, the energy of the strong pump light is combined into the oscillation mode of the silicon material of the optical fiber through stimulated Raman scattering (SRS), and then emitted at a longer wavelength, which is the wavelength of the signal light, thereby amplifying the weak signal light and obtaining Raman gain.

Fiber loss includes bending loss, absorption loss and scattering loss.

Which of the following logic function blocks is used to generate an R-LOS alarm?