Nokia GMPLS-Controlled Optical Networks : 4A0-220

4A0-220 real exams

Exam Code: 4A0-220

Exam Name: Nokia GMPLS-Controlled Optical Networks

Updated: Jul 28, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-220 Exam Syllabus Topics:

SectionObjectives
Topic 1: GMPLS Fundamentals- GMPLS architecture overview
  • 1. Control plane vs data plane
    • 2. Label switching technologies
      - MPLS extensions for optical networks
      • 1. Traffic engineering principles
        • 2. LSP concepts in optical domain
          Topic 2: 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
                  Topic 3: Optical Transport Networks- OTN architecture
                  • 1. Mapping and grooming
                    • 2. OTUk/ODUk structure
                      - WDM and DWDM systems
                      • 1. Optical spectrum management
                        • 2. Channel multiplexing
                          Topic 4: Control Plane Protocols- RSVP-TE signaling
                          • 1. Resource reservation
                            • 2. Path setup and teardown
                              - Routing protocols
                              • 1. OSPF-TE extensions
                                • 2. IS-IS traffic engineering

                                  Nokia GMPLS-Controlled Optical Networks Sample Questions:

                                  1. What is the purpose of the Upstream Label Object in RSVP-TE?

                                  A) It allows a node to restrict the labels that may be used downstream.
                                  B) It indicates the LSP flow direction.
                                  C) It signals resource reservation information to upstream nodes.
                                  D) It allows for a label to be suggested to provision bidirectional LSPs.


                                  2. What is Tunnel Property Heritage?

                                  A) Cost, SRLG, and Color properties are propagated from HO to LO LSPs.
                                  B) A restored tunnel inherits the ODUk flows.
                                  C) The hierarchy tunnels cannot be nested unless they share the same properties.
                                  D) Maximum allowed bandwith is propagated from HO to LO LSPs.


                                  3. What is the GMRE node address?

                                  A) The OSPF-TE broadcast IP used to flood the link adjacency information
                                  B) An IP address for CORBA communication with the NMS
                                  C) The IP address for communication between NEs
                                  D) The LMP Control Channel ID. This field contains the IPv4 address of the ingress LER as a global unique identifier


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

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


                                  Solutions:

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

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