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4A0-205 - Nokia Optical Networking Fundamentals

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4A0-205 Questions and Answers

Question # 1

What isthe definition of OSNR?


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.


The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.


The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.


The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.

Question # 2

Which use case is most suitable for the deployment of a star topology?


Access networks, for collecting traffic towards the main central node


ASON networks, to protect traffic via GMPL5 protocols


Backbone networks, for supporting protection routes


SNCP-protected links

Question # 3

What is the function of a pre-amplifier in an optical network?


Through the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.


Through the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.


Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.


Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.

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