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Nokia NRN-522 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Performance Monitoring and Optimization20%- Key performance indicators (KPIs)
  • 1. Accessibility, retainability, mobility KPIs
  • 2. Throughput and latency metrics
- Performance analysis and optimization
  • 1. Counter and trace analysis
  • 2. Parameter tuning for better performance
Topic 2: Fault Management and Troubleshooting25%- Common issues and solutions
  • 1. Interference and coverage issues
  • 2. Connection and access problems
- Alarm and fault handling
  • 1. Fault isolation and resolution steps
  • 2. Alarm classification and interpretation
Topic 3: Network Configuration and Management25%- Software management and upgrades
  • 1. Software download, activation and rollback
  • 2. Backup and restore procedures
- Parameter management and configuration
  • 1. Cell, carrier and beam configuration
  • 2. Mobility and handover parameters
Topic 4: Security and Compliance10%- Security features and procedures
  • 1. Data integrity and encryption
  • 2. Access control and authentication
Topic 5: 5G RAN Architecture and Fundamentals20%- 5G RAN logical and physical architecture
  • 1. NSA and SA deployment options
  • 2. gNB functions and components
- Protocol stack and interfaces
  • 1. F1, E1, Xn, NG interfaces
  • 2. User plane and control plane protocols

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Nokia 5G RAN Network Operations Expert Sample Questions (Q29-Q34):

NEW QUESTION # 29
What is a 'threshold crossing alert' (TCA), and how does it differ from a standard equipment fault alarm?

Answer: C

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 # 30
During a remote piloting session, what communication practice is most important for the NOC engineer and field engineer to follow to ensure tasks are completed safely and correctly?

Answer: D

Explanation:
Effective remote piloting depends on clear, step-by-step communication where each action - whether performed by the field engineer physically or the NOC engineer remotely - is confirmed as complete before the next dependent step proceeds. This sequential confirmation approach ensures that both parties maintain an accurate, shared understanding of the site's current state at every point in the procedure, which is critical for both safety (for example, confirming a cell is locked before physical work begins near an antenna) and technical correctness (for example, confirming a physical connection has been made before the NOC engineer attempts to verify it remotely). Providing all instructions upfront without ongoing confirmation risks steps being missed, performed out of order, or performed before prerequisite conditions are met. Relying solely on non-real-time communication such as email is impractical for time-sensitive coordination, and allowing the field engineer to proceed entirely independently removes the collaborative verification that makes remote piloting effective and safe.


NEW QUESTION # 31
Why is an automatic fallback (rollback) mechanism important when activating new software on a base station?

Answer: A

Explanation:
An automatic fallback mechanism is a critical safeguard in software lifecycle management. After activating a new software load, the base station undergoes a defined health-check period during which it must successfully come into normal operational state - for example, cells returning to service without critical faults. If this does not occur within the configured timeout, the automatic fallback mechanism reverts the unit to the previous software load that was known to be working, restoring service without requiring a NOC engineer to manually diagnose and correct the issue in real time. This significantly limits the duration and impact of a failed activation, which is especially important for remote sites where physical intervention would be slow. This mechanism does not delete the previous version immediately (it must remain available for the fallback to function), does not eliminate the need for post-activation monitoring, and does not automatically propagate changes to other base stations, which remains a separately scheduled and monitored activity.


NEW QUESTION # 32
While remotely piloting an RF unit replacement, the NOC engineer notices the new unit is detected but the cell fails to come into service, with an alarm indicating a CPRI/eCPRI configuration mismatch. What is a likely cause that the NOC and field engineer should jointly investigate?

Answer: B

Explanation:
A CPRI/eCPRI configuration mismatch alarm following a hardware replacement often indicates that the physical connection topology does not align with what the system's configuration expects - commonly because the replacement RF unit was connected to a different physical port on the baseband module than the original unit occupied. Since configuration data often references specific port mappings to associate logical cell configurations with specific physical RF unit connections, a port mismatch can prevent the system from correctly associating the detected hardware with the expected configuration, resulting in the cell failing to come into service despite the link being physically established. The NOC engineer should work with the field engineer to confirm exactly which physical port the new unit is connected to and compare this against the expected port mapping in the configuration, correcting either the physical connection or the configuration as appropriate. Cosmetic details such as cable ties or paint color, and unrelated identifiers like PLMN ID, have no bearing on this type of technical mismatch.


NEW QUESTION # 33
For security segmentation, NOC personnel typically do not connect directly from their workstations to production AirScale base stations. Instead, they first authenticate to an intermediate, hardened host. What is this intermediate host commonly called?

Answer: A


NEW QUESTION # 34
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