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Last Updated: Aug 03, 2026

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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Topic 1: Optical Transport Networks- WDM and DWDM systems
  • 1. Optical spectrum management
    • 2. Channel multiplexing
      - OTN architecture
      • 1. Mapping and grooming
        • 2. OTUk/ODUk structure
          Topic 2: Control Plane Protocols- RSVP-TE signaling
          • 1. Resource reservation
            • 2. Path setup and teardown
              - Routing protocols
              • 1. IS-IS traffic engineering
                • 2. OSPF-TE extensions
                  Topic 3: Protection and Restoration- Network resiliency mechanisms
                  • 1. Fast reroute mechanisms
                    • 2. 1+1 protection schemes
                      - Failure recovery strategies
                      • 1. Traffic restoration techniques
                        • 2. Link/node failure recovery
                          Topic 4: GMPLS Fundamentals- MPLS extensions for optical networks
                          • 1. LSP concepts in optical domain
                            • 2. Traffic engineering principles
                              - GMPLS architecture overview
                              • 1. Control plane vs data plane
                                • 2. Label switching technologies

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. Which of the following best describes the Soft Shutting Down state in the NFM-T?

                                  A) A soft synchronization state where new traffic is not allowed
                                  B) An automatic shutdown of a TE-link and all of the LSPs in the TE-link
                                  C) An administrative maintenance state where services stay up but no new traffic can be routed over the TE-link
                                  D) A transient state where current SNCs are soft-rerouted away from the TE-link


                                  2. How do you add a 3R resource to the NPA in NFM-T?

                                  A) The 3R is added to the NPA through the Constraint Wizard
                                  B) The trail is provisioned with 3R constraints and discovered automatically
                                  C) The resource is discovered automatically
                                  D) The 3R is added in the Node panel and automatically added to the NPA


                                  3. Which of the following is not a key feature of GMPLS?

                                  A) Self-discovery
                                  B) Restoration
                                  C) Fast protection
                                  D) Resource optimization


                                  4. Which of the following best describes the Shutting Down state in the NFM-T?

                                  A) An automatic shut down of all LSPs in the TE-link
                                  B) It is the same as the administrative maintenance state. No new traffic can be routed over the TE-Unk
                                  C) A transient state where current SNCs are soft-rerouted
                                  D) A soft maintenance state where new traffic is allowed for restoration


                                  Solutions:

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

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