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

4A0-220 real exams

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Jul 31, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Protection and Restoration- Network resiliency mechanisms
  • 1. 1+1 protection schemes
    • 2. Fast reroute mechanisms
      - Failure recovery strategies
      • 1. Traffic restoration techniques
        • 2. Link/node failure recovery
          Optical Transport Networks- WDM and DWDM systems
          • 1. Channel multiplexing
            • 2. Optical spectrum management
              - OTN architecture
              • 1. OTUk/ODUk structure
                • 2. Mapping and grooming
                  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
                          Control Plane Protocols- RSVP-TE signaling
                          • 1. Resource reservation
                            • 2. Path setup and teardown
                              - Routing protocols
                              • 1. IS-IS traffic engineering
                                • 2. OSPF-TE extensions

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What is the Feasibility File in GMRE nodes?

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


                                  2. How do you configure the Trail template in NFM-T for an Uplink board (such as 2UC400) in a network with only LI restoration capability?

                                  A) Uncheck the Logical Link box Set the Port Type to Terminated Check the ASON Routed box Check the ASON Tunnel box
                                  B) Check the Logical Link box
                                  Set the Port Type to Unterminated Check the ASON Routed box Check the ASON Tunnel box
                                  C) Uncheck the Logical Link box NSet the Port Type to Terminated
                                  Uncheck the ASON Routed box Uncheck the ASON Tunnel box
                                  D) Check the Logical Link box
                                  Set the Port Type to Unterminated Uncheck the ASON Routed box Uncheck the ASON Tunnel box


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

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


                                  4. What does Test Mode do in an SNC?

                                  A) It initiates the LMP link verification by sending Test Messages
                                  B) The LSP will not be restored and will behave like an unprotected service
                                  C) Source nodes of affected client services will not be notified in case of failure
                                  D) It clears the ASONTOPO alarms


                                  Solutions:

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

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