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Nokia Optical Networking Fundamentals Sample Questions (Q36-Q41):

NEW QUESTION # 36
In which window(s) does the attenuation reach its minimum peak?

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

Answer: A Explanation:
The third window (1550 nm) is where the attenuation reaches its minimum peak. This is because the materials used in fiber optic cables have minimal absorption in this wavelength range. The first and second windows (850 nm and 1300 nm respectively) have higher attenuation due to the materials used in the fiber optic cables.
NEW QUESTION # 37
What is the definition of OSNR?

• A. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.
• B. 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.
• C. The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
• D. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.

Answer: A Explanation:
The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth. This is also known as the signal-to-noise ratio (SNR), and it is a measure of how much signal is present in the optical signal compared to the noise, usually expressed in decibels (dB).
NEW QUESTION # 38
With reference to trails and services, which of the following sentences is correct?

• A. Trails are transported over services; that is, trails are clients with respect to services.
• B. Services are transported over trails; that is, services are clients with respect to trails.
• C. A trail can interconnect three ports, while a service always two.
• D. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.

Answer: B Explanation:
Services are transported over trails; that is, services are clients with respect to trails. A service is a logical connection that is used to transport data from one point to another. It is created over a trail, which is a physical connection that is established by using multiple wavelengths. As such, services are clients with respect to trails, as they are transported over them.
NEW QUESTION # 39
What is the purpose of the NFM-T node synchronization?

• A. The partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).
• B. The partial or full node synchronization allows several entities/items defined at NFM-T level to be exported into an XML file, to be used as input for EPT (download to design).
• C. The partial or full node synchronization allows several entities/items defined at EPT level to be retrieved into the NFM-T database (upload from design).
• D. The partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).

Answer: A Explanation:
This is done in order to keep the NFM-T database in sync with the nodes in the network. The synchronization process allows the NFM-T to keep track of any changes that are made to the nodes, such as new nodes added, nodes removed, and so on. By synchronizing the node database with the NFM-T, network administrators can ensure that their network is up to date and running efficiently.
NEW QUESTION # 40
Which mechanisms can be put in place to increase network survivability?

• A. Protection, where backup resources are pre-allocated and reserved; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
• B. Protection, where backup resources are allocated upon failure; or restoration, where backup resources are pre-allocated and reserved
• C. Protection, where backup resources are allocated upon failure; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
• D. Protection, where backup resources are pre-allocated and reserved; or restoration, where backup resources are allocated upon failure.

Answer: D Explanation:
There are two main mechanisms that can be put in place to increase network survivability: protection and restoration. Protection involves pre-allocating and reserving backup resources so that they are ready in case of a failure. Restoration involves allocating backup resources upon failure and using a 1+1 protection mechanism to recover each trail. This ensures that the network is able to re-route traffic in the event of a failure, increasing the overall survivability of the network.
NEW QUESTION # 41
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