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: Aug 07, 2026
  • Q & A: 40 Questions and Answers
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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Protection and Restoration- Failure recovery strategies
  • 1. Link/node failure recovery
    • 2. Traffic restoration techniques
      - Network resiliency mechanisms
      • 1. Fast reroute mechanisms
        • 2. 1+1 protection schemes
          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- RSVP-TE signaling
                  • 1. Path setup and teardown
                    • 2. Resource reservation
                      - Routing protocols
                      • 1. OSPF-TE extensions
                        • 2. IS-IS traffic engineering
                          GMPLS Fundamentals- MPLS extensions for optical networks
                          • 1. LSP concepts in optical domain
                            • 2. Traffic engineering principles
                              - GMPLS architecture overview
                              • 1. Control plane vs data plane
                                • 2. Label switching technologies

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What does an SNC state of lower case "n" mean for a resource in NFM-T?

                                  A) Indicates the nominal resource on a TE-link that is not in use
                                  B) Indicates if s a higher alarm state level
                                  C) Indicates it's using a link other than the Nominal
                                  D) Indicates it's currently using the Nominal resource assigned to it


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

                                  A) The list of LSPs created in the entire network
                                  B) The state of each link 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


                                  3. What is the purpose of the RSVP-TE Notify message?

                                  A) It is confirmation of a node's resource reservation
                                  B) It is the node's alarm control channel
                                  C) It is a mechanism to inform the NM5 of L5P events
                                  D) It is a mechanism to inform non-adjacent nodes of LSP events


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

                                  A) Fast protection
                                  B) Self-discovery
                                  C) Resource optimization
                                  D) Restoration


                                  Solutions:

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

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