Nokia 4A0-265 Exam Questions Instant Access

Question 1

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

A11.5

B8.0

C2.5

D1.5

Answer : B

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.

Question 2

Which of the following statements about the Wavelength Tracker (WT) capability is TRUE?

AWave Keys are originated by optical amplifiers.

BWT uses a unique identifier based on a pair of numbers encoded by Raman amplifiers into each service wavelength direction.

CWT is compatible with other vendor domains, but the user must make sure that Wave Keys are unique on the crossed domains.

DWT uses a unique identifier based on a pair of numbers encoded by Optical Transponders OTs) into each service wavelength direction.

Answer : D

The statement that WT uses a unique identifier based on a pair of numbers encoded by Optical Transponders (OTs) into each service wavelength direction is TRUE. WT is a feature of the 1830 PSS that allows for automatic identification and tracking of wavelengths across different network elements and domains. WT uses Wave Keys, which are unique identifiers composed of two numbers: a Wave Key ID and a Wave Key Code.The Wave Key ID identifies the OT that generates the wavelength, while the Wave Key Code identifies the wavelength itself within a given OT6. The Wave Keys are encoded by OTs into each service wavelength direction using phase modulation, and can be decoded by other OTs or amplifiers that have WT capability. WT enables various applications and benefits, such as simplified commissioning, automated wavelength routing, enhanced fault localization, and improved network security.Reference:Nokia Optical Diagnostics and Troubleshooting Course | Nokia,Optical User Guide - Nokia,Alcatel-Lucent 1830 PSS-8 and PSS-16 Photonic Service Switch

Question 3

Consider the exhibit which shows an EPT Power Management Report for an ingress amplifier.

What is the available output optical power range?

A-0.6 to 1.72 dB

B-0.02 to 1.14 dB

C0.56 to 1.14 dB

D0.56 to 1.72 dB

Answer : A

The available output optical power range is the difference between the maximum gain and the minimum gain range of the ingress amplifier. According to the EPT Power Management Report, the maximum gain is 25.7 dB and the minimum gain range is 14 dB. Therefore, the available output optical power range is 25.7 - 14 = 11.7 dB. To convert this to a logarithmic scale, we use the formula 10^(x/10), where x is the value in dB. Therefore, the available output optical power range in logarithmic scale is 10^(11.7/10) - 10^(14/10) = 14.68 - 25.12 = -0.6 to 1.72 dB.Reference:Nokia Optical Diagnostics and Troubleshooting Course | Nokia,EPT Power Management Report | Nokia

Question 4

Which of the following statements about using Nokia product documentation in the troubleshooting process is TRUE?

ABefore investigating a problem it is important to check the Engineering and Planning Tool User Guide (EPTUG) if a possible issue has already been acknowledged by the Product Unit (PU).

BThe Customer Release Notes (CRNs) provides instructions to perform the automated provisioning, commissioning, and power balancing functions in a customer network based on the Nokia 1830 PS5 platform.

CBefore investigating a problem it is important to check the User Provisioning Guide (UPG) if a possible issue has already been acknowledged by the Product Unit (PU).

DThe Customer Release Notes (CRNs) document collects documented solved known issues, new issues discovered after the product software has been released.as well as software upgrade procedures and firmware details.

Answer : D

The Customer Release Notes (CRNs) document collects documented solved known issues, new issues discovered after the product software has been released, as well as software upgrade procedures and firmware details. This document is useful for troubleshooting because it can help identify if a problem is related to a known issue or a software bug, and if there is a workaround or a solution available. The CRNs also provide information about the software compatibility and interoperability of different Nokia products and platforms. The other options are incorrect because the EPTUG and the UPG do not contain information about known issues, and the CRNs do not provide instructions for automated provisioning, commissioning, and power balancing functions.Reference:Nokia Optical Diagnostics and Troubleshooting Course,Nokia Optical Diagnostics and Troubleshooting Exam

Question 5

Which of the following statements best describes the payload type setting?

APayload type attribute is recorded within the client payload and must be entered manually.

BPayload type attribute Is recorded within the client payload and can be set automatically.

CPayload type attribute is recorded within the OTN overhead and must be entered manually.

DPayload type attribute is recorded within the OTN overhead and can be set automatically or manually.

Answer : B

The payload type setting is an attribute that is recorded within the client payload and can be set automatically or manually. The payload type setting indicates the type of client signal that is carried by the OTN frame, such as Ethernet, Fibre Channel, or SDH/SONET. The payload type setting can be used for service identification and performance monitoring purposes. The payload type setting can be set automatically by the ML-Series card, which can detect the client signal type and encode it in the payload header. Alternatively, the payload type setting can be set manually by the user using the commandconfig interface <interface> encmode <encmode> payloadtype , where<interface>is the client interface name,<encmode>is the encapsulation mode, such as GFP-F or BMP, andis the client signal type, such as 10GE LAN or FC-1200. The other options are incorrect because they either state that the payload type setting is recorded within the OTN overhead, which is not true, or that it must be entered manually, which is not necessary.Reference:Nokia Optical Diagnostics and Troubleshooting Course,OAM and Diagnostics Guide

Question 6

Which of the following commands is used to retrieve the total output power level?

Ashow interface am2125a 1/6/lineout

Bshow interface am2125a 1/6/lineout detail

Cshow interface am212 5a 1/6/lineout pm

Dshow interface am2125a 1/6/lineout wavekey

Answer : B

The commandshow interface am2125a 1/6/lineout detailis used to retrieve the total output power level of the AM2125A amplifier module. This command displays detailed information about the lineout interface, including the current optical power, wavelength, and status.The total output power level is shown asOutput Power (dBm)in the output of this command1.Reference:Nokia Optical Diagnostics and Troubleshooting Course | Nokia

Question 7

Consider the exhibit which shows part of an EPT Schematic View. Which number refers to the Wavelength Router (WR8-88) block?

Answer : A

The Wavelength Router (WR8-88) block is a device that can route optical signals based on their wavelengths. It can also perform wavelength conversion, multiplexing, and demultiplexing functions.The Wavelength Router (WR8-88) block is part of the Nokia 1830 PSS-8x platform, which is optimized for metro aggregation switching applications in optical transport networks1. In the exhibit, the number 1 refers to the Wavelength Router (WR8-88) block, as indicated by the label WR8-88AF. The other numbers refer to different components of the system, such as transponders, amplifiers, and switches.Reference:Nokia Optical Diagnostics and Troubleshooting Course,DWDM 1830 PSS-8 WR8-88AF Board

Nokia Optical Diagnostics and Troubleshooting 4A0-265 Exam Questions