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

Nokia 4A0-220 exam
  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Sep 08, 2026
  • Q & A: 40 Questions and Answers
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Nokia 4A0-220 Exam Syllabus Topics:
SectionObjectives
Optical Transport Networks- OTN architecture
  • 1. OTUk/ODUk structure
    • 2. Mapping and grooming
      - WDM and DWDM systems
      • 1. Channel multiplexing
        • 2. Optical spectrum management
          Control Plane Protocols- Routing protocols
          • 1. IS-IS traffic engineering
            • 2. OSPF-TE extensions
              - RSVP-TE signaling
              • 1. Resource reservation
                • 2. Path setup and teardown
                  Protection and Restoration- Failure recovery strategies
                  • 1. Traffic restoration techniques
                    • 2. Link/node failure recovery
                      - Network resiliency mechanisms
                      • 1. Fast reroute mechanisms
                        • 2. 1+1 protection schemes
                          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
                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:
                                  Question #1

                                  A network with ROADM GMPLS nodes and optical transponder connections could have:

                                  • A. L0 and LI restoration capabilities
                                  • B. L0 restoration capabilities
                                  • C. L1 restoration capabilities
                                  • D. No restoration capabilities
                                  Answer: A

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                                  Question #2

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

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

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                                  Question #3

                                  Which categories of protocols are included in the GMPLS technology?

                                  • A. Routing, signaling, and link management
                                  • B. Signaling, routing, and forwarding
                                  • C. Routing, grooming, and signaling
                                  • D. Link management, signaling, and switching
                                  Answer: A

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                                  Question #4

                                  When should two physical connections belong to the same SRG?

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

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