Nokia GMPLS-Controlled Optical Networks : 4A0-220

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Aug 11, 2026

Q & A: 40 Questions and Answers

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

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Nokia 4A0-220 Exam Syllabus Topics:

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

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

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

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


                                  2. Which of the following is not a GMPLS protocol?

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


                                  3. How is the GMRE functionality guaranteed in Nokia equipment?

                                  A) The specific software configuration guarantees GMRE functionality
                                  B) Rack redundancy guarantees GMRE functionality in case of a power outage
                                  C) Controller redundancy guarantees GMRE functionality
                                  D) Redundant LAN cables guarantee GMRE functionality


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

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


                                  Solutions:

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

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