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Nokia Optical Diagnostics and Troubleshooting Sample Questions (Q23-Q28):

NEW QUESTION # 23
Suppose a node is experiencing a little unexpected attenuation over the Optical Supervisory Channel (OSC) transmit direction. Which of the following statements is FALSE?

  • A. A "Data Link Down" alarm will raise on the adjacent node.
  • B. Traffic will pass between the local and adjacent node.
  • C. A Power adjustments action will fail on the local node.
  • D. No OSC-related alarms will raise on the local node.

Answer: D

Explanation:
Explanation
The statement that is false is that no OSC-related alarms will raise on the local node. OSC stands for Optical Supervisory Channel, which is a dedicated wavelength used for out-of-band signaling and management of optical network elements. If a node is experiencing a little unexpected attenuation over the OSC transmit direction, it means that the OSC signal is weaker than expected when it reaches the adjacent node. This can cause a "Data Link Down" alarm to raise on the adjacent node, indicating that the OSC communication link is broken or degraded. However, this can also cause an "OSC Power Low" alarm to raise on the local node, indicating that the OSC transmit power is below the threshold. Therefore, there will be OSC-related alarms on both nodes. The other statements are true because a power adjustment action will fail on the local node due to insufficient OSC power, and traffic will pass between the nodes as long as there is no other issue affecting the data channels. References: Nokia Optical Diagnostics and Troubleshooting Course, Optical Supervisory Channel Module product data sheet


NEW QUESTION # 24
Refer to the exhibit, which shows a conditions list from the 1830 PSS GUI. (i) What is the total number of alarms reported? (ii) How many service affecting alarms are displayed? (iii) How many conditions are displayed?

  • A. (i) total number of alarms = 2
    (ii) number of service affecting alarms = 2
    (Hi) number of conditions = 18
  • B. (i) total number of alarms = 7
    (ii) number of service affecting alarms = 5
    (Hi) number of conditions = 7
  • C. (i) total number of alarms = 4
    (ii) number of service affecting alarms = 14
    (iii) number of conditions = 2
  • D. (I) total number of alarms = 5
    (ii) number of serviceaffectingalarms = 2
    (Hi) number of conditions = 14

Answer: B

Explanation:
Explanation
The exhibit shows a conditions list from the 1830 PSS GUI, which displays the alarms and events that occur on the network elements. The total number of alarms reported is equal to the number of rows that have a red or yellow icon in the Severity column, indicating a critical or major alarm. In this case, there are 7 rows with such icons, so the total number of alarms is 7. The number of service affecting alarms is equal to the number of rows that have a "Yes" valuein the Service Affecting column, indicating that the alarm affects the service quality or availability. In this case, there are 5 rows with such values, so the number of service affecting alarms is 5. The number of conditions is equal to the total number of rows in the table, regardless of their severity or service affecting status. In this case, there are 7 rows in the table, so the number of conditions is
7. References : Optical User Guide - Nokia, Security Target Nokia 1830 Photonic Service Switch (PSS)


NEW QUESTION # 25
Which of the following statements correctly describes where power adjustments can be performed?

  • A. When Raman pumps are used, both ingress and egress power adjustments are performed against the Raman pump directly.
  • B. In unidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.
  • C. In bidirectional configurations, ingress power adjustments are performed against the ingress amplifiers, while egress power adjustments are performed against the egress amplifiers.
  • D. In bidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.

Answer: C

Explanation:
Explanation
In bidirectional configurations, where the same fiber is used to transmit signals in both directions, power adjustments can be performed at both ingress and egress amplifiers. The ingress power adjustments are performed against the ingress amplifiers, which boost the incoming signals from the opposite direction. The egress power adjustments are performed against the egress amplifiers, which boost the outgoing signals from the same direction2. Therefore, the statement A is correct. References : Nokia Optical Diagnostics and Troubleshooting Course | Nokia, Optical amplifiers, explained by RP; optical amplification


NEW QUESTION # 26
Suppose a network operator needs to configure the 10GbE client interface 1/7/C1 with a GFP-F encapsulation mode. Which command should be used?

  • A. config interface 1/7/C1 encmode 10client gfp-f
  • B. config encmode interface 1/7/C1 10client gfp-f
  • C. config interface 1/7/C1 tenGige encmode gfp-f
  • D. config encmode interface 1/7/C1 tenGige gfp-f

Answer: A

Explanation:
Explanation
The command that should be used to configure the 10GbE client interface 1/7/C1 with a GFP-F encapsulation mode is config interface 1/7/C1 encmode 10client gfp-f. This command will set the encapsulation mode of the interface to GFP-F, which is a frame-mapped generic framing procedure that encapsulates Ethernet frames with a GFP header. The command also specifies that the interface is a 10GbE client interface, which means that it supports 10 Gigabit Ethernet LAN signals. The other commands are incorrect because they either have invalid syntax or use incorrect parameters for the interface or the encapsulation mode. References: Nokia Optical Diagnostics and Troubleshooting Course, OAM and Diagnostics Guide


NEW QUESTION # 27
Consider the exhibit. Given the following power readings, what is the calculated span loss from Node A to Node B?

  • A. 8.0
  • B. 2.5
  • C. 1.5
  • D. 11.5

Answer: A

Explanation:
Explanation
The exhibit shows a diagram of a network with two nodes, Node A and Node B, connected by a fiber span.
The diagram also shows the power readings at different points of the span. The calculated span loss from Node A to Node B is the difference between the output power at Node A and the input power at Node B. According to the diagram, the output power at Node A is +3.5 dBm and the input power at Node B is -4.5 dBm.
Therefore, the span loss from Node A to Node B is 3.5 - (-4.5) = 8.0 dB.


NEW QUESTION # 28
......

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