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

4A0-220
  • Exam Code: 4A0-220
  • Exam Name: Nokia GMPLS-Controlled Optical Networks
  • Updated: Sep 15, 2026
  • Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Topic 1: Optical Transport Networks- OTN architecture
  • 1. OTUk/ODUk structure
    • 2. Mapping and grooming
      - WDM and DWDM systems
      • 1. Channel multiplexing
        • 2. Optical spectrum management
          Topic 2: GMPLS Fundamentals- MPLS extensions for optical networks
          • 1. Traffic engineering principles
            • 2. LSP concepts in optical domain
              - GMPLS architecture overview
              • 1. Label switching technologies
                • 2. Control plane vs data plane
                  Topic 3: Protection and Restoration- Failure recovery strategies
                  • 1. Traffic restoration techniques
                    • 2. Link/node failure recovery
                      - Network resiliency mechanisms
                      • 1. Fast reroute mechanisms
                        • 2. 1+1 protection schemes
                          Topic 4: Control Plane Protocols- RSVP-TE signaling
                          • 1. Path setup and teardown
                            • 2. Resource reservation
                              - Routing protocols
                              • 1. IS-IS traffic engineering
                                • 2. OSPF-TE extensions

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  Question #1

                                  In a 1830PSS MRN network, when can groups of links be combined (bundled) together in a single TE-Link?

                                  • A. Only within layer 1 networks
                                  • B. Only within layer 0 networks
                                  • C. Never
                                  • D. Both within layer 0 and 1 networks
                                  Reveal Solution  Discussion  0

                                  Correct Answer: D  🗳️

                                  Explanation: Only visible for Exam4Tests members. You can sign-up / login (it's free).

                                  Question #2

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

                                  • A. Fast protection
                                  • B. Restoration
                                  • C. Self-discovery
                                  • D. Resource optimization
                                  Reveal Solution  Discussion  0

                                  Correct Answer: D  🗳️

                                  Explanation: Only visible for Exam4Tests members. You can sign-up / login (it's free).

                                  Question #3

                                  Which label is swapped in an MPLS label stack at an intermediate node?

                                  • A. The label with the highest value
                                  • B. The label on the top
                                  • C. The label on the bottom
                                  • D. The label with the lowest value
                                  Reveal Solution  Discussion  0

                                  Correct Answer: B  🗳️

                                  Explanation: Only visible for Exam4Tests members. You can sign-up / login (it's free).

                                  Question #4

                                  What is the Feasibility File in GMRE nodes?

                                  • A. A control checklist for the operator
                                  • B. A file with target values that determine whether a given LSP can be routed
                                  • C. A file with commissioned GMRE nodes for NPA implementation
                                  • D. A file of optical impairment parameters for power balance
                                  Reveal Solution  Discussion  0

                                  Correct Answer: B  🗳️

                                  Explanation: Only visible for Exam4Tests members. You can sign-up / login (it's free).

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