What is one of the main benefits of using Dense Wavelength Division Multiplexing (DWDM) for Ethernet transmission?

One of the primary benefits of using Dense Wavelength Division Multiplexing (DWDM) for Ethernet transmission is its ability to increase the distance that Ethernet signals can travel. DWDM works by utilizing multiple wavelengths (or channels) of light on a single optical fiber. By transmitting data on several wavelengths simultaneously, it significantly enhances the capacity of the fiber. This technology allows for longer transmission distances without the need for frequent regeneration or signal boosting.

DWDM reduces signal degradation over long distances, facilitating more extended network reaches while maintaining high data rates. This capability is particularly crucial in telecommunications and data transport networks, where long-distance connectivity is often required.

While other options address different technical aspects of Ethernet networks, they do not capture the essential attribute of DWDM's impact on distance. For instance, reducing network latency, enhancing data security, or decreasing hardware requirements are benefits associated with other technologies or configurations but are not the primary strengths of DWDM in terms of distance capabilities.