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Nokia NRN-522 (Nokia 5G RAN Network Operations Expert) Certification Exam is an industry-leading certification designed to help network operations experts validate their skills and knowledge in Nokia 5G radio access network (RAN) technology. NRN-522 Exam is aimed at professionals who want to boost their expertise in the latest 5G RAN technology and learn the latest best practices and methods to maintain 5G RAN networks.
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Nokia NRN-522 certification exam covers a range of topics, including 5G network architecture, radio access network protocols, network element configuration and optimization, and network performance management. NRN-522 Exam is designed to test both theoretical knowledge and practical skills, with a focus on real-world scenarios and hands-on experience.
NEW QUESTION # 45
What is a 'threshold crossing alert' (TCA), and how does it differ from a standard equipment fault alarm?
Answer: D
Explanation:
A threshold crossing alert (TCA) is generated when a monitored performance counter or KPI - such as PRB utilization, processor load, or a quality metric - crosses an operator-configured threshold value, providing visibility into a performance-related condition that may or may not correspond to an actual hardware fault.
For example, sustained high PRB utilization on a cell might trigger a TCA flagging a capacity concern, prompting capacity planning or optimization actions, even though no equipment has failed. This differs fundamentally from a standard equipment fault alarm, which is raised in direct response to a detected hardware or communication failure condition. TCAs are configurable by the operator, allowing thresholds to be tuned to the network's specific performance targets and capacity planning needs, and they are not limited to software license conditions, nor are they fixed, unconfigurable values.
NEW QUESTION # 46
What is the standard alarm severity ordering used in NetAct Fault Management, from highest to lowest severity?
Answer: B
Explanation:
NetAct Fault Management follows the standard telecom alarm severity hierarchy: Critical, Major, Minor, and Warning, in descending order of severity. Critical alarms indicate a total or near-total loss of service, capability, or capacity, requiring immediate NOC action since they have the most severe impact on network availability and subscribers. Major alarms indicate serious degradation requiring prompt action, though typically with somewhat less urgency than Critical. Minor alarms represent non-service-affecting faults that should still be corrected to prevent future escalation into more serious issues. Warning alarms are generally informational or preventive, flagging conditions that could lead to a problem if left unaddressed but with no current service impact. Understanding this ordering is fundamental to NOC triage and prioritization: when multiple alarms appear on a dashboard, Critical alarms must be addressed first, followed by Major, Minor, and finally Warning, and this ordering underlies SLA-based response time commitments.
NEW QUESTION # 47
Following completion of a hardware replacement and remote piloting activity, which combination of checks represents the most complete final verification before the NOC engineer closes out the activity as successful?
Answer: B
Explanation:
A complete final verification after a hardware replacement and remote piloting activity should confirm multiple dimensions of the site's restored operational state. This includes checking that alarms directly related to the replaced component and the maintenance activity itself have cleared as expected (with any remaining alarms understood and unrelated to the activity), confirming the affected cell has been unlocked and successfully returned to an in-service state, verifying that relevant communication links - such as CPRI
/eCPRI links to RF units or the AISG bus connection to antenna line devices - report normal status, and reviewing short-term performance indicators to confirm they are consistent with the site's established baseline, indicating the cell is performing as expected under real traffic. Only this combination provides genuine assurance that the activity was successful end-to-end. Administrative details like tool packing, serial number matching against shipping records (while useful for inventory purposes), and weather conditions do not address whether the network element is actually functioning correctly.
NEW QUESTION # 48
An AirScale base station simultaneously raises a 'Cell Out of Service' alarm and an 'RF unit communication failure' alarm. How should a NOC engineer typically interpret this combination using alarm correlation principles?
Answer: A
Explanation:
Alarm correlation in Fault Management helps distinguish a root-cause alarm from symptom (consequent) alarms that appear together for a single underlying problem. In this scenario, an RF unit communication failure indicates a problem with the radio hardware or its link to the baseband, which directly prevents the cell served by that RF unit from operating - this generates the Cell Out of Service alarm as a direct consequence. NOC procedure is to focus remediation on the root-cause alarm (the RF unit communication failure); resolving it should automatically clear the dependent Cell Out of Service alarm. Treating both as separate, unrelated faults wastes troubleshooting effort on what is really a single underlying issue. NetAct can display many simultaneous alarms per element, and a Cell Out of Service alarm is itself a symptom, not a cause of hardware failure.
NEW QUESTION # 49
A specific neighbor relation between Cell A and Cell B shows a consistently low handover success rate, while overall network-wide mobility KPIs remain healthy. What is the most appropriate first troubleshooting step?
Answer: C
Explanation:
Because the issue is isolated to a single neighbor relation rather than affecting overall network mobility, the problem is most likely localized to the configuration between these two specific cells rather than a broader hardware, transport, or core network fault - which would typically affect multiple relations or KPIs more broadly. The appropriate first step is to review the neighbor relation configuration, including parameters such as handover thresholds, measurement gap settings, frequency relations, and Automatic Neighbor Relation (ANR) data, to confirm the relation is correctly defined and that measurement configurations align with actual RF conditions between the two cells. Misconfigured handover thresholds, missing or incorrect frequency information, or an outdated neighbor list entry are common causes of localized handover failures.
Restarting hardware, rebooting core elements, or adjusting power network-wide are disproportionate actions that risk impacting unrelated cells and do not target the specific, isolated nature of the reported problem.
NEW QUESTION # 50
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