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Nokia Optical Network Services Expert 4A0-220

4A0-220

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Aug 19, 2026

Q&A Number: 40 Q&As

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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. 1+1 protection schemes
        • 2. Fast reroute mechanisms
          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
                  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
                          Optical Transport Networks- WDM and DWDM systems
                          • 1. Optical spectrum management
                            • 2. Channel multiplexing
                              - OTN architecture
                              • 1. OTUk/ODUk structure
                                • 2. Mapping and grooming

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What is a Label Switched Path (LSP)?

                                  A) A protocol used by nodes to exchange information about the state of labels
                                  B) A High Order Container for client signal
                                  C) A switched protection path
                                  D) The path created by MPLS nodes


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


                                  3. 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 frequency of each client path in the entire network
                                  D) The bandwidth of each client path in the entire network


                                  4. What is the Link Maintenance window?

                                  A) A wizard with commands to set links and nodes to maintenance
                                  B) A wizard for modifying TE-link attributes
                                  C) A centralized alarm manager
                                  D) A centralized view of the TE-link for the operator


                                  Solutions:

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

                                  4A0-220 Related Exams
                                  4A0-265 - Nokia Optical Diagnostics and Troubleshooting
                                  Related Certifications
                                  Nokia SRC Certification
                                  Nokia Certification
                                  Nokia Network Routing Specialist II (NRS II)
                                  Nokia Certification
                                  Nokia Certified NSP IP Network Automation Professional
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