Question 1

Which of the following statements about Data Communication Network (DCN) is FALSE?

Options :

A : DCN is a data network carrying the management and/or signaling traffic of a telecommunication network.

B : Out of Band DCN is the part of a DCN that is not implemented by the managed network elements.

C : In Band DCN is the part of a DCN that is not implemented by the managed network elements.

D : In Band DCN is the part of a DCN that is implemented by the managed network elements.

Answer: C

Question 2

WDM allows transmission systems to:

Options :

A : Transport multiple signals transparently, onto several wavelengths, all together over one single fiber

B : Increase the bit rate of each client signal by spreading it over multiple wavelengths

C : Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission

D : Allocate different signals to different time slots

Answer: A

Question 3

Which of the following statements is true about chromatic dispersion (CD)?

Options :

A : Different channels have different bandwidth and this causes different CD performances.

B : The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.

C : Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.

D : The fiber attenuation introduces inter-channel interference.

Answer: C

Question 4

In which window(s) does the attenuation reach its minimum peak?

Options :

A : First window (850 nm)

B : Second window (1300 nm)

C : Third window (1550 nm)

D : Both first and second windows

Answer: D

Question 5

Which of the following applications is related to Wavelength Tracker tool?

Options :

A : Collecting logs related to possible issue affecting a wavelength path

B : Tracking the protection path for a specific wavelength

C : Tracing the end-to-end wavelength optical power

D : Correcting errors related to wavelength inconsistencies

Answer: C

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