Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 200

Which technology enables the addition of new wavelengths in a fiber-optic network?

Answer options

• A. IPoDWDM
• B. CWDM
• C. DWDM
• D. ROADM

Correct answer: D

Explanation

ROADM (Reconfigurable Optical Add-Drop Multiplexer) enables dynamic addition and removal of wavelengths in a fiber-optic network, making it a flexible option for managing bandwidth. In contrast, IPoDWDM, CWDM, and DWDM are technologies related to wavelength division multiplexing but do not offer the same level of reconfigurability as ROADM.