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4A0-205 Actual Exam Questions

Last updated on Dec. 22, 2024.
Vendor:Nokia
Exam Code:4A0-205
Exam Name:Nokia Optical Networking Fundamentals
Exam Questions:68
97% Passed the exam with this material
 

Topic 1 - Exam A

Question #1 Topic 1

What is the definition of OSNR?

  • A. The OSNR is defined as the ratio between the transmitted optical power and the received optical power over 1 km of fiber, including both signal and optical noise.
  • B. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.
  • C. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.
  • D. The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
Reveal Solution Hide Solution   Discussion   3

Correct Answer: D 🗳️

Question #2 Topic 1

Which of the following are the main reasons for fiber attenuation?

  • A. Refraction and reflection
  • B. Scattering and absorption
  • C. Chromatic dispersion (CD) and polarization mode dispersion (PMD)
  • D. Small channel spacing
Reveal Solution Hide Solution   Discussion   2

Correct Answer: B 🗳️

Question #3 Topic 1

What is the meaning of first, second, and third window in the optical fiber propagation context?

  • A. These windows correspond to three different minimum and maximum optical power levels used for optical transmission.
  • B. These windows are three different wavelength intervals where the WDM optical transmission occurs.
  • C. These three windows are three different angles of incidence of the light injected by the laser into the fiber.
  • D. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.
Reveal Solution Hide Solution   Discussion   3

Correct Answer: B 🗳️

Question #4 Topic 1

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

  • A. First window (850 nm)
  • B. Second window (1300 nm)
  • C. Third window (1550 nm)
  • D. Both first and second windows
Reveal Solution Hide Solution   Discussion   3

Correct Answer: D 🗳️

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