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Nokia Optical Networking Fundamentals Sample Questions (Q24-Q29):

NEW QUESTION # 24
What is the definition of OSNR?

A. The OSNR is defined as the ratio between the optical signal power (including noise) and the 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 average optical signal power and the average 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: C

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 # 25
Which of the following are the main reasons for fiber attenuation?

A. Chromatic dispersion (CD) and polarization mode dispersionB. Small channel spacingC. Refraction and reflectionD. Scattering and absorption

Answer: D

Explanation:
Scattering and absorption are the main reasons for fiber attenuation. Scattering occurs when light bounces off the sides of the fiber, while absorption happens when light is absorbed by the glass or other materials that make up the fiber. Chromatic dispersion (CD) and polarization mode dispersion (PMD) are also factors that can cause attenuation, but they are not the main causes. Small channel spacing can also cause attenuation, but it is a secondary factor and is only significant in certain cases.


NEW QUESTION # 26
What is the OAMP LAN interface?

A. It is an RJ-45 interface (a common Ethernet port) used for cascading 1830 PSS nodes (e.g., external shelves)B. It is an RJ-45 interface (a common Ethernet port) used to export active alarms to an external device, typically equipped with several LEDsC. It is an RJ-45 interface (common Ethernet port) used to connect one or more client ports (e.g., 1Gb/s or legacy 100Mbit/s client flows)D. It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management

Answer: D

Explanation:
It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management. This interface is used to connect the OAMP node to the LAN, allowing it to be managed and monitored remotely.


NEW QUESTION # 27
Which statement is correct about node synchronization?

A. Node synchronization is executed to align the time of the node to the time of the NFM-T platformB. Node synchronization is executed to test the reachability of a nodeC. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)D. Full synchronization retrieves the correlated alarms from the node

Answer: C

Explanation:
Node synchronization is a process of keeping the NFM-T database in sync with the nodes in the network. The synchronization process will download all the items from the node, including NE parameters, ports, alarms, internal links, etc., to the NFM-T database. This ensures that the NFM-T database is up to date and the network is running efficiently.


NEW QUESTION # 28
What is a trail?

A. A link between end points to increase the power budget of the optical linkB. A transparent transport of a client signalC. An entity to encapsulate a low order signal into a high order containerD. A physical link between two optical amplifiers

Answer: B

Explanation:
A trail is a transparent transport of a client signal. A trail is a physical link between two points in an optical network, allowing for the transport of a client signal from one point to the other. It is a low-order signal, such as a 10G Ethernet or a Fibre Channel signal, encapsulated into a high-order container, such as a 40G or 100G signal. This allows for the transport of the client signal over longer distances, increasing the power budget of the optical link.


NEW QUESTION # 29
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