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Exam contains 48 questions

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Question 7 🔥

When monitoring the quality of the received signal in WDM, an open eye indicates:

Which database solution meets these requirements?

A. Low noise

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B. High distortion

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C. High jitter

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D. Presence of high inter-symbolic interference

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Discussion of the question

Question 8 🔥

Which of the following sentence about FlexGrid is false?

Which database solution meets these requirements?

A. FlexGrid allows a more efficient channel spacing.

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B. Channels in FlexGrid systems are allocated with a granularity of 27.5 GHz.

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C. FlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.

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D. The FlexGrid is currently standardized by ITU-T.

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Discussion of the question

Question 9 🔥

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

Which database solution meets these requirements?

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

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

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

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D. 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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Discussion of the question

Question 10 🔥

What is a degree-1 node?

Which database solution meets these requirements?

A. A node with only one direction and therefore a terminal node

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B. A node with only one express channel and therefore made of two sides

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C. A node with only east and west sides without directions towards north and south

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D. A node with one direction only and therefore used as In-Line-Amplifier (ILA)

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Discussion of the question

Question 11 🔥

With reference to trails and services, which of the following sentences is correct?

Which database solution meets these requirements?

A. Trails are transported over services; that is, trails are clients with respect to services.

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B. A trail can interconnect three ports, while a service always two.

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C. Services are transported over trails; that is, services are clients with respect to trails.

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D. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.

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Discussion of the question

Question 12 🔥

What is the definition of OSNR?

Which database solution meets these requirements?

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.

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

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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.

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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.

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Discussion of the question

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Exam contains 48 questions

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