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Nokia Optical Network Services Expert 4A0-220

4A0-220

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Oct 17, 2026

Q&A Number: 40 Q&As

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Nokia 4A0-220 Exam Syllabus Topics:

SectionWeightObjectives
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
          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
                  Advanced GMPLS Features10%- SRLG and path diversity
                  - GMPLS optimization and scalability
                  GMPLS Protection and Restoration25%- Protection mechanisms
                  • 1. PRC and SBR
                    • 2. 1+1, 1:1, shared protection
                      - Restoration across layers
                      • 1. Restoration priority and coordination
                        • 2. Multilayer survivability
                          GMPLS Service Provisioning and Operation20%- Maintenance and monitoring
                          • 1. Fault detection and isolation
                            • 2. Performance monitoring
                              - Creating and managing optical trails and services
                              • 1. Tunnel and LSP provisioning
                                • 2. Path computation and constraints

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  Question #1
                                  Which of the following information is present in every GMPLS-enabled node?

                                  A. The state of each link in the entire network
                                  B. The list of LSPs created in the entire network
                                  C. The frequency of each client path in the entire network
                                  D. The bandwidth of each client path in the entire network


                                  Question #2
                                  A network with ROADM GMPLS nodes and optical transponder connections could have:

                                  A. L0 restoration capabilities
                                  B. No restoration capabilities
                                  C. L1 restoration capabilities
                                  D. L0 and LI restoration capabilities


                                  Question #3
                                  Which of the following is not a GMPLS protocol?

                                  A. LMP
                                  B. SFD
                                  C. RSVP-TE
                                  D. OSPF-TE


                                  Question #4
                                  What does Test Mode do in an SNC?

                                  A. It initiates the LMP link verification by sending Test Messages
                                  B. Source nodes of affected client services will not be notified in case of failure
                                  C. It clears the ASONTOPO alarms
                                  D. The LSP will not be restored and will behave like an unprotected service


                                  Solutions:

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

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