Nokia GMPLS-Controlled Optical Networks : 4A0-220

4A0-220 real exams

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Sep 29, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Topic 1: 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
          Topic 2: 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 3: GMPLS Fundamentals- GMPLS architecture overview
                  • 1. Label switching technologies
                    • 2. Control plane vs data plane
                      - MPLS extensions for optical networks
                      • 1. LSP concepts in optical domain
                        • 2. Traffic engineering principles
                          Topic 4: Optical Transport Networks- WDM and DWDM systems
                          • 1. Optical spectrum management
                            • 2. Channel multiplexing
                              - OTN architecture
                              • 1. OTUk/ODUk structure
                                • 2. Mapping and grooming

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  Question #1

                                  What is the definition of Constrained Shortest Path First (CSPF)?

                                  • A. It is the SPF algorithm applied to low bandwidth LSPs.
                                  • B. It is the 5FP algorithm applied after pruning links that do not meet the specified constraints.
                                  • C. It is a combination between OSPF-TE and RSVP-TE.
                                  • D. It is the SPF algorithm applied for low latency LSPs.
                                  Reveal Solution  Discussion  0

                                  Correct Answer: B  🗳️

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                                  Question #2

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

                                  • A. Restoration
                                  • B. Resource optimization
                                  • C. Fast protection
                                  • D. Self-discovery
                                  Reveal Solution  Discussion  0

                                  Correct Answer: B  🗳️

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                                  Question #3

                                  When should two physical connections belong to the same SRG?

                                  • A. When they share the same risk of failure
                                  • B. When they are both selected during the setup process
                                  • C. When they are fully disjoint respective to the risk of failure
                                  • D. When one is the protection of the other
                                  Reveal Solution  Discussion  0

                                  Correct Answer: A  🗳️

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                                  Question #4

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

                                  • A. Supporting multi-vendor networks
                                  • B. Reducing CAPEX
                                  • C. Reducing OPEX
                                  • D. Providing resilience against multiple failures
                                  Reveal Solution  Discussion  0

                                  Correct Answer: C  🗳️

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