Nokia GMPLS-Controlled Optical Networks : 4A0-220

4A0-220 real exams

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Aug 05, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

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

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. Which of the following statements about the Wait for Server Restoration (WSR) parameter in the MRN is correct?

                                  A) When WSR is true, the LO optical channel remains in the link until the failure is fixed.
                                  B) When WSR is false, if the failed optical channel can be restored at LO, the data traffic stays in the tunnel.
                                  C) When WSR is true, the LO channels do not wait for the LI services to restore.
                                  D) When WSR is false, the LI services do not wait for the LO restoration and restore through LI switching.


                                  2. 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 setting the color constraints
                                  C) Coordination is achieved by comparing the Setup Priorities
                                  D) Coordination is achieved by setting the WSR parameter


                                  3. What is the purpose of the RSVP-TE Notify message?

                                  A) It is the node's alarm control channel
                                  B) It is a mechanism to inform the NM5 of L5P events
                                  C) It is confirmation of a node's resource reservation
                                  D) It is a mechanism to inform non-adjacent nodes of LSP events


                                  4. What is the Link Maintenance window?

                                  A) A wizard for modifying TE-link attributes
                                  B) A centralized view of the TE-link for the operator
                                  C) A wizard with commands to set links and nodes to maintenance
                                  D) A centralized alarm manager


                                  Solutions:

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

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