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

  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Jul 26, 2026   Q&As: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:
SectionObjectives
Topic 1: GMPLS Fundamentals- GMPLS architecture overview
  • 1. Control plane vs data plane
    • 2. Label switching technologies
      - MPLS extensions for optical networks
      • 1. Traffic engineering principles
        • 2. LSP concepts in optical domain
          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: Optical Transport Networks- OTN architecture
                  • 1. Mapping and grooming
                    • 2. OTUk/ODUk structure
                      - WDM and DWDM systems
                      • 1. Optical spectrum management
                        • 2. Channel multiplexing
                          Topic 4: Control Plane Protocols- Routing protocols
                          • 1. IS-IS traffic engineering
                            • 2. OSPF-TE extensions
                              - RSVP-TE signaling
                              • 1. Path setup and teardown
                                • 2. Resource reservation
                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

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

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


                                  2. What is the purpose of the Upstream Label Object in RSVP-TE?

                                  A) It signals resource reservation information to upstream nodes.
                                  B) It allows a node to restrict the labels that may be used downstream.
                                  C) It indicates the LSP flow direction.
                                  D) It allows for a label to be suggested to provision bidirectional LSPs.


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

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


                                  4. Which of the following information is present in every GMPLS-enabled node?

                                  A) The state of each link in the entire network
                                  B) The list of LSPs created in the entire network
                                  C) The bandwidth of each client path in the entire network
                                  D) The frequency of each client path in the entire network


                                  Solutions:

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

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