In what type of installation is WWDM used?

The correct answer is the type of installation for which Wavelength-Wavelength Division Multiplexing (WWDM) is utilized. In Passive Optical Networks (PONs), WWDM facilitates the transmission of multiple signals over the same optical fiber by using different wavelengths of light. This technology enhances the capacity of the network by allowing multiple users to share the same fiber infrastructure without significant loss of signal quality.

In PONs, there is no active switching equipment that amplifies or regenerates the signal in the network. Instead, the use of different wavelengths allows the system to separate and direct data to the appropriate recipients. This method is particularly effective in reducing overall costs associated with network deployment while maximizing the utilization of the fiber infrastructure.

The other types of installations mentioned, such as active optical networks, point-to-point networks, and hybrid fiber-coaxial networks, typically rely on different protocols or technologies that may not benefit from wavelength division multiplexing in the same manner as PONs.