Discuss Nokia 4A0-205 Exam Topic 2 Question 70

Which of the following statements about Wavelength Tracker monitoring points in CDC-F architecture is TRUE?

AWavelength Tracker monitoring points are settled on ITL mux interfaces and on OTs line interfaces.

BWavelength Tracker monitoring points are settled on IRDMxx line interfaces only.

CWavelength Tracker monitoring points are settled on IRDMxx line interfaces and on CWR CLS interfaces.

DWavelength Tracker monitoring points are settled on IRDMxx and OTs line interfaces.

Suggested Answer: C

Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:

In a CDC-F (Colorless, Directionless, Contentionless, Flex-grid) architecture, the placement of monitoring points is vital for end-to-end visibility of wavelengths. Nokia's Wavelength Tracker technology relies on these points to detect the unique 'keys' or signatures associated with each wavelength. In a CDC-F node, the primary monitoring points are located on the IRDMxx (Intelligent Reconfigurable Demultiplexer/Mux) line interfaces and the CWR (Colorless Wavelength Router) CLS (Colorless) interfaces.

The IRDM monitoring points allow the system to verify the power and presence of wavelengths as they enter or leave the fiber spans (degrees). The CWR CLS monitoring points are critical because they provide visibility at the 'Colorless' add/drop stage. By having monitoring at both locations, the WaveSuite Network Operations Center (WS-NOC) can pinpoint exactly where a signal loss or power degradation is occurring---whether it's in the external fiber plant or within the internal colorless switching fabric of the ROADM. This granular visibility is what allows Nokia's 'Power Management' to automate balancing across complex mesh topologies.

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12 comments · newest first

Rosina 1 month ago

I feel like B is too limited. IRDMxx alone doesn’t cover everything.

Natalie 2 months ago

I’m leaning towards D. OTs line interfaces are crucial too.

Vincenza 2 months ago

I think option A is correct. ITL mux interfaces make sense for monitoring.

Monte 2 months ago

C) is interesting, but I don’t think it’s right.

Jose 2 months ago

Wait, are you sure about A)? Sounds off.

Marisha 2 months ago

Definitely D) with OTs too, makes sense!

Ty 2 months ago

I thought it was just B) for IRDMxx.

Frank 3 months ago

A) is correct, they’re on ITL mux and OTs.

Tamala 3 months ago

I remember that Wavelength Tracker monitoring points are important, but I can't remember if they are only on IRDMxx or if they also include CWR CLS interfaces.

Allene 3 months ago

I’m not entirely sure, but I think option A sounds familiar. I might have seen something about ITL mux interfaces in my notes.

Chu 3 months ago

I think I practiced a similar question where we had to identify monitoring points, and I feel like it was about both IRDMxx and OTs.

Lashon 3 months ago

I remember studying that Wavelength Tracker points are related to different interfaces, but I can't recall if it's just IRDMxx or if it includes OTs too.

Nokia 4A0-205 Exam - Topic 2 Question 70 Discussion