Which two options describe the advantages of using DWDM over traditional optical networks? (Choose two)

DWDM simultaneously transmits many wavelengths over a single fiber pair, enabling flexible logical topologies across a shared physical plant, and employs built-in chromatic dispersion compensation to maintain signal integrity across long distances - a capability inherent to DWDM optics.

Claiming DWDM provides service protection 'without penalty' is technically inaccurate because protection schemes consume reserved bandwidth and add overhead, which constitutes a real capacity and cost penalty.

Protection capabilities in DWDM are optional features implemented through specific line cards and configurations rather than a universally inherent property that distinguishes DWDM from all traditional optical technologies.

Service protection through direct integration with an external system is not a standard inherent advantage of the DWDM technology itself and depends on optional, externally coupled systems outside the DWDM platform.

By modulating tens to hundreds of independent wavelengths onto a single fiber, DWDM dramatically increases usable bandwidth capacity without requiring new fiber deployment, which is a definitive advantage over traditional single-wavelength optical systems.