Which statement describes a characteristic of dense wavelength division multiplexing (DWDM)?
- It supports the SONET standard, but not the SDH standard.
- It enables bidirectional communications over one pair of copper cables.
- It can be used in long-range communications, like connections between ISPs.
- It assigns incoming electrical signals to specific frequencies.
Related exam: CCNA 4 - Connecting Networks (v5.0.3 + v6.0) Final Exam Answers
