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Nokia 4A0-220 : Nokia GMPLS-Controlled Optical Networks

4A0-220

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Sep 18, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

SectionWeightObjectives
GMPLS Fundamentals and Architecture20%- GMPLS LSP types and characteristics
  • 1. LSP attributes and metrics
    • 2. L0, L1, and MRN LSPs
      - GMPLS control plane overview
      • 1. GMRE and NFM-T integration
        • 2. Layers and components
          GMPLS Service Provisioning and Operation20%- Creating and managing optical trails and services
          • 1. Path computation and constraints
            • 2. Tunnel and LSP provisioning
              - Maintenance and monitoring
              • 1. Performance monitoring
                • 2. Fault detection and isolation
                  GMPLS Protection and Restoration25%- Restoration across layers
                  • 1. Restoration priority and coordination
                    • 2. Multilayer survivability
                      - Protection mechanisms
                      • 1. 1+1, 1:1, shared protection
                        • 2. PRC and SBR
                          GMPLS Routing and Signaling Protocols25%- OSPF-TE and IS-IS TE extensions
                          • 1. Link and resource advertisement
                            • 2. Traffic engineering database
                              - RSVP-TE for GMPLS
                              • 1. Label allocation and signaling
                                • 2. Path and Resv messages
                                  Advanced GMPLS Features10%- GMPLS optimization and scalability
                                  - SRLG and path diversity

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  Question #1
                                  What is Tunnel Property Heritage?

                                  A. Cost, SRLG, and Color properties are propagated from HO to LO LSPs.
                                  B. Maximum allowed bandwith is propagated from HO to LO LSPs.
                                  C. A restored tunnel inherits the ODUk flows.
                                  D. The hierarchy tunnels cannot be nested unless they share the same properties.


                                  Question #2
                                  Which provisioning steps arecommon in both CP to plain MP networks?

                                  A. Node creation
                                  CPB provisioning process Node synchronization NPA implementation
                                  B. Node creation
                                  CPB provisioning process Node synchronization CPB power balance
                                  C. Node creation SRG creation Node synchronization CPB power balance
                                  D. Node creation
                                  CPB provisioning process Link association CPB power balance


                                  Question #3
                                  How do you configure the Trail template in NFM-T for an Uplink board (such as 2UC400) in a network with only LI restoration capability?

                                  A. Uncheck the Logical Link box Set the Port Type to Terminated Check the ASON Routed box Check the ASON Tunnel box
                                  B. Check the Logical Link box
                                  Set the Port Type to Unterminated Uncheck the ASON Routed box Uncheck the ASON Tunnel box
                                  C. Uncheck the Logical Link box NSet the Port Type to Terminated
                                  Uncheck the ASON Routed box Uncheck the ASON Tunnel box
                                  D. Check the Logical Link box
                                  Set the Port Type to Unterminated Check the ASON Routed box Check the ASON Tunnel box


                                  Question #4
                                  How are L0 and L1 resources coordinated in case of a failure in an MRN?

                                  A. Coordination is achieved by segregation of color and colorless LSPs
                                  B. Coordination is achieved by comparing the Setup Priorities
                                  C. Coordination is achieved by setting the color constraints
                                  D. Coordination is achieved by setting the WSR parameter


                                  Solutions:

                                  Question #1
                                  Correct Answer: A
                                  Question #2
                                  Correct Answer: B
                                  Question #3
                                  Correct Answer: B
                                  Question #4
                                  Correct Answer: C

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