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Nokia GMPLS-Controlled Optical Networks : 4A0-220

4A0-220
  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Aug 01, 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 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. Path and Resv messages
                        • 2. Label allocation and signaling
                          Advanced GMPLS Features10%- GMPLS optimization and scalability
                          - SRLG and path diversity
                          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

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

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


                                  2. How can you modify the SNC Nominal Route in NFM-T?

                                  A) By putting the LSP in Test mode and moving traffic
                                  B) By using the Constraint Wizard to modify the constraints
                                  C) By changing the SRG constraints
                                  D) By using the Reroute Wizard to modify the constraints


                                  3. What is a Label Switched Path (LSP)?

                                  A) A protocol used by nodes to exchange information about the state of labels
                                  B) A switched protection path
                                  C) The path created by MPLS nodes
                                  D) A High Order Container for client signal


                                  4. Which of the following information is present in every GMPLS-enabled node?

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


                                  Solutions:

                                  Question # 1
                                  Answer: D
                                  Question # 2
                                  Answer: B
                                  Question # 3
                                  Answer: C
                                  Question # 4
                                  Answer: B

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