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

Nokia 4A0-220 Actual PDF
  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Aug 02, 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. Resource reservation
        • 2. Path setup and teardown
          Topic 2: 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 3: Protection and Restoration- Failure recovery strategies
                  • 1. Traffic restoration techniques
                    • 2. Link/node failure recovery
                      - Network resiliency mechanisms
                      • 1. 1+1 protection schemes
                        • 2. Fast reroute mechanisms
                          Topic 4: GMPLS Fundamentals- GMPLS architecture overview
                          • 1. Control plane vs data plane
                            • 2. Label switching technologies
                              - MPLS extensions for optical networks
                              • 1. LSP concepts in optical domain
                                • 2. Traffic engineering principles

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What is the GMRE notify address?

                                  A) The LMP Control Channel ID. This field contains the IPv4 address of the ingress LER as a global unique identifier
                                  B) The email exchange server to notify the operators of network failures
                                  C) An IP address used to signal failures on downstream nodes upstream to the head node
                                  D) The OSPF-TE broadcast IP used to flood the link adjacency information


                                  2. 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) A transient state where current SNCs are soft-rerouted
                                  C) A soft maintenance state where new traffic is allowed for restoration
                                  D) It is the same as the administrative maintenance state. No new traffic can be routed over the TE-Unk


                                  3. What is the Commissioning File in GMRE nodes?

                                  A) A file with commissioned GMRE nodes for NPA implementation
                                  B) A control checklist for the operator
                                  C) A file of optical impairment parameters for power balance
                                  D) A file with target values that determine whether a given LSP is possible


                                  4. Which of the following parameters is not considered when restoring an LSP?

                                  A) Coloring
                                  B) Equipment vendor
                                  C) Maximum latency
                                  D) Reservation priority


                                  Solutions:

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

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