Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 327

What does DWDM use to combine multiple optical signals?

Answer options

• A. IP protocols
• B. wavelength
• C. time slots
• D. frequency

Correct answer: B

Explanation

DWDM (Dense Wavelength Division Multiplexing) combines multiple optical signals by using different wavelengths of light. This allows for the transmission of several data streams over a single fiber optic cable simultaneously. The other options like IP protocols, time slots, and frequency do not pertain to the specific technique DWDM employs for signal combination.