Nokia 4A0-220 real exam prep : Nokia GMPLS-Controlled Optical Networks

  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Aug 14, 2026
  • Q&As: 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%- 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
                  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. Multilayer survivability
                        • 2. Restoration priority and coordination
                          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

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What is the Link Maintenance window?

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


                                  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 Link association CPB power balance
                                  C) Node creation SRG creation Node synchronization CPB power balance
                                  D) Node creation
                                  CPB provisioning process Node synchronization CPB power balance


                                  3. Automation is one of the key features of GMPLS. What is its main benefit?

                                  A) Providing resilience against multiple failures
                                  B) Supporting multi-vendor networks
                                  C) Reducing CAPEX
                                  D) Reducing OPEX


                                  4. Which of the following statements best describes a distributed control plane for GMPLS?

                                  A) The network manager controls all the routing for the network.
                                  B) The network is managed by more than one network management system.
                                  C) The control plane is active in some network nodes and not in others.
                                  D) Each router has software to run the GMPLS protocols and can modify the node's switching fabric.


                                  Solutions:

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

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