2026 Valid NRN-522 Test Materials | High-quality NRN-522 100% Free Books PDF

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Nokia NRN-522 Exam Syllabus Topics:

SectionObjectives
5G RAN Systems and Fault Management- Software and configuration management
  • 1. Configuration parameter updates in live networks
    • 2. Base station software management
      - Alarm and fault handling
      • 1. Fault detection and diagnosis in RAN nodes
        • 2. Troubleshooting operational issues
          Network Operations in 5G RAN- Operations Center procedures
          • 1. Coordinate with technical support teams for issue resolution
            • 2. Support network operation center workflows
              - Remote operation of 5G Radio Access Network
              • 1. Connect to Nokia 5G RAN products and solutions
                • 2. Apply standard parameter configuration changes
                  • 3. Retrieve faults and alarms
                    • 4. Manage base station software lifecycle

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                      Nokia 5G RAN Network Operations Expert Sample Questions (Q25-Q30):

                      NEW QUESTION # 25
                      NetAct reports the transport link to a remote 5G site as 'up', but the NOC engineer still cannot establish an OandM session to the AirScale BTS. What is the MOST appropriate next troubleshooting step?

                      Answer: C

                      Explanation:
                      When basic transport/IP connectivity to a site is confirmed as up but an O and M management session still cannot be established, the issue is likely at a higher layer than physical or network-layer reachability.
                      Common causes include expired or mismatched security certificates, incorrect login credentials, or a misconfigured O and M IP address or management VLAN on the base station itself. A layered troubleshooting approach moves from transport, to network, to application/management-layer checks once lower layers are confirmed functional. Replacing the RF module addresses a hardware radio issue, not an O and M session
                      /authentication problem, and would be premature without further evidence. Adjusting reference signal power is unrelated to management connectivity. Restarting the entire NetAct server is a drastic action affecting the whole managed network and is never an appropriate first response to a single-site connectivity issue.


                      NEW QUESTION # 26
                      An 'Equipment Over-Temperature' alarm is raised at a remote site. Besides checking the cooling system itself, what else should a NOC engineer review related to this alarm?

                      Answer: A

                      Explanation:
                      An 'Equipment Over-Temperature' alarm indicates internal temperature monitoring has detected conditions exceeding safe operating limits, which can lead to performance throttling or automatic protective shutdown of the affected hardware. Beyond inspecting the cooling system itself, a NOC engineer should check whether related environmental alarms are also present at the site, such as a cabinet door-open alarm (which disrupts climate control), a fan failure alarm, or an HVAC/air-conditioning fault alarm for the shelter or cabinet.
                      These correlated alarms often explain an over-temperature condition by pointing to a broader site environmental issue rather than an isolated equipment defect, helping correctly scope the response (for example, escalating an environmental/facilities issue rather than treating it purely as a RAN equipment fault).
                      The cell's PCI value, handover success rate, and NetAct license expiry date are entirely unrelated to thermal conditions and would not assist in diagnosing this alarm.


                      NEW QUESTION # 27
                      Before rolling out a new software release across an entire region's base stations, an operator first activates it on a small subset of sites and closely monitors their performance for a period of time. What is this practice commonly called, and what is its primary benefit?

                      Answer: C

                      Explanation:
                      A staged or pilot rollout - sometimes referred to as a canary deployment - involves activating a new software release on a small, representative subset of sites first, then closely monitoring key indicators such as alarms, KPIs, and overall stability for a defined observation period before proceeding with wider deployment. The primary benefit of this approach is risk containment: if the new software introduces an unforeseen issue - whether a compatibility problem, a performance regression, or an unexpected interaction with certain configurations - the impact is limited to the pilot sites rather than the entire region, allowing the issue to be identified and addressed (potentially by halting further rollout) before it affects a much larger portion of the network. This practice is a software lifecycle risk-management technique and is unrelated to factory resets, configuration audits focused on PLMN consistency, or bulk parameter updates, which serve entirely different operational purposes.


                      NEW QUESTION # 28
                      A transport alarm 'Ethernet link down' is raised on the BTS-side interface toward the aggregation router. What is an appropriate FIRST remote action for the NOC engineer?

                      Answer: D

                      Explanation:
                      When a transport-side alarm such as 'Ethernet link down' is raised on the BTS-facing interface toward the aggregation router, the appropriate first remote action is to investigate the physical and data-link layer status of that interface - checking link/port status, interface configuration such as speed and duplex settings and VLAN membership, and any visible cable/connector status indicators through management tools. If the issue appears to originate on the transport provider's side of the connection (such as a leased line or microwave link fault), coordinating with that provider is the next step. Only if remote checks cannot resolve the issue, or clearly indicate a physical hardware or cabling fault at the site, would on-site dispatch be considered.
                      Replacing the RF module addresses radio hardware, not a transport link fault, and modifying neighbor relations or cell bandwidth are RAN configuration changes that would not resolve a physical link failure.


                      NEW QUESTION # 29
                      What is the Nokia-recommended access control practice for NOC personnel who remotely manage live production AirScale base stations?

                      Answer: D

                      Explanation:
                      Because a centralized Operations Center manages thousands of live network elements, strict access control is essential to maintaining network integrity and security. Nokia's operational security model requires each engineer to use an individually assigned account, with role-based access control (RBAC) restricting actions to those required for the user's job function - a configuration engineer might have provisioning rights, while a monitoring-only NOC analyst might have read-only access. This least-privilege approach provides full traceability of who performed which action, supports accountability during root-cause investigations, and limits the impact if any single account is compromised. Sharing a generic administrator account destroys individual accountability and increases risk of untraceable changes. Disabling session logging removes the audit trail needed for troubleshooting and compliance. Leaving default factory passwords unchanged is a well-known security vulnerability that must be remediated during commissioning, not a recommended ongoing practice.


                      NEW QUESTION # 30
                      ......

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