4A0-205 Accurate Study Material, Real 4A0-205 Questions

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Nokia 4A0-205 Exam Syllabus Topics:

SectionObjectives
WDM and Optical Transport Technologies- Wavelength Division Multiplexing (WDM)
  • 1. Channel spacing and grid concepts
    • 2. CWDM vs DWDM principles
      - Optical Transport Network (OTN)
      • 1. OTN framing and multiplexing basics
        • 2. Mapping and encapsulation concepts
          Fundamentals of Optical Networking- Optical networking components
          • 1. Transmitters and receivers
            • 2. Passive optical components (splitters, couplers)
              • 3. Optical amplifiers (EDFA)
                - Optical fiber principles and transmission characteristics
                • 1. Fiber types and structure
                  • 2. Attenuation and dispersion concepts
                    • 3. Optical signal behavior in fiber
                      Optical Network Architectures and Systems- Performance and impairments
                      • 1. Noise and OSNR basics
                        • 2. Chromatic dispersion and nonlinear effects
                          - Metro and long-haul optical networks
                          • 1. ROADM and switching principles
                            • 2. Network topology concepts

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                              Nokia Optical Networking Fundamentals Sample Questions (Q47-Q52):

                              NEW QUESTION # 47
                              Which mechanisms can be put in place to increase network survivability?

                              Answer: B

                              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 # 48
                              Which of the following sentences about FlexGrid is false?

                              Answer: C

                              Explanation:
                              FlexGrid is a flexible grid technology that allows for variable channel spacing and bandwidth allocation. It uses the same sets of boards as the traditional fixed grid systems and it does not require upgrading the old generation WDM systems.
                              Reference:
                              "Flexible Grid Optical Networks: From Concepts to Realizations" by Diomidis S. Michalopoulos and George K. Karagiannidis
                              "Flexible Grid and Flexible Spectrum Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis
                              "Flexible Grid Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis


                              NEW QUESTION # 49
                              What is a Shared Risk Group (SRG)?

                              Answer: A

                              Explanation:
                              According to the Nokia Optical Networking documentation, a Shared Risk Group (SRG) is defined as "a set of network resources that share a common failure risk. When a resource in an SRG fails, the other resources in the group are also affected." This can include fibers, boards, nodes, and other network resources. The SRG concept is used in network design and protection mechanisms to ensure survivability and minimal impact on service in case of a failure.


                              NEW QUESTION # 50
                              Where can the user set the long-haul WT decoder parameter, when designing a network with EPT?

                              Answer: B

                              Explanation:
                              The long-haul WT decoder parameter can be set in the NE parameters when designing a network with EPT. This parameter is used to adjust the sensitivity of the decoder and can help to improve the accuracy of the measurements for long-haul WTs.
                              The Network Element (NE) parameters in EPT (Element Planning Tool) are used to configure various settings and options for the network elements in the network. The long-haul WT decoder parameter is one such setting that can be configured in the NE parameters section. The user can access the NE parameters by navigating to the NE Parameters menu within the EPT interface. The user can then select the appropriate network element and modify the settings as needed. This information can be found in the Nokia guide for EPT.


                              NEW QUESTION # 51
                              Which statement is correct about the NFM-T network map?

                              Answer: B

                              Explanation:
                              The NFM-T network map provides a graphical view of the network with different colors used to represent each node, physical connection, and active alarm. It allows the user to quickly identify any issues in the network and provides context sensitive navigation.


                              NEW QUESTION # 52
                              ......

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