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Last Updated: Aug 11, 2026

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Nokia 4A0-220 Exam Syllabus Topics:

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

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. Which categories of protocols are included in the GMPLS technology?

                                  A) Routing, signaling, and link management
                                  B) Link management, signaling, and switching
                                  C) Routing, grooming, and signaling
                                  D) Signaling, routing, and forwarding


                                  2. What is Tunnel Property Heritage?

                                  A) Maximum allowed bandwith is propagated from HO to LO LSPs.
                                  B) Cost, SRLG, and Color properties are propagated from HO to LO LSPs.
                                  C) The hierarchy tunnels cannot be nested unless they share the same properties.
                                  D) A restored tunnel inherits the ODUk flows.


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

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


                                  4. When should two physical connections belong to the same SRG?

                                  A) When they share the same risk of failure
                                  B) When they are fully disjoint respective to the risk of failure
                                  C) When one is the protection of the other
                                  D) When they are both selected during the setup process


                                  Solutions:

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

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