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| Certification Vendor: | Nokia |
|---|---|
| Exam Name: | Nokia 5G RAN Network Operations Expert |
| Exam Number: | NRN-522 |
| Related Certifications: | Nokia 5G RAN Optimization Expert Nokia 5G RAN Design Expert Nokia 5G RAN Network Professional (NRNP) Nokia 5G RAN Field Operations Expert |
| Available Languages: | English |
| Sample Questions: | Nokia NRN-522 Sample Questions |
| Exam Way: | Nokia certification exam delivered through authorized testing channels; availability may include online-proctored and/or test-center delivery depending on region and Nokia certification policies. |
| Pre Condition: | Recommended to have achieved the Nokia 5G RAN Network Professional (NRNP) certification before pursuing the Expert-level certification. Passing the mandatory NRN-522 exam is required for certification. |
| Official Syllabus URL: | https://www.nokia.com/networks/training/5g/ran/certifications/expert/ |
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NEW QUESTION # 20
A cell repeatedly raises and clears 'Cell Unavailable' alarms. Performance data shows PRB utilization dropping to zero during exactly the same periods. Which area should be investigated FIRST as the likely root cause?
Answer: D
Explanation:
When a cell repeatedly raises and clears 'Cell Unavailable' alarms, and PRB utilization simultaneously drops to zero during exactly those same intervals, this pattern strongly indicates the cell is genuinely going out of service intermittently, rather than a display or reporting artifact. The investigation should focus on causes capable of producing repeated, short-duration outages: transport link instability (brief link flaps causing loss of the cell's connectivity), loss of synchronization reference (particularly significant for TDD 5G, where sync loss can force a cell to stop transmitting to avoid interference), or unexpected hardware resets/restarts of the baseband or radio unit, potentially linked to environmental issues such as overheating or power fluctuations.
NetAct UI theme settings, subscriber handset models, and the billing system are entirely unrelated to RAN service availability and would not explain this correlated alarm and KPI pattern. Correlating alarm timing with PM data and environmental/transport alarms is a key NOC diagnostic technique.
NEW QUESTION # 21
A 'High VSWR' (Voltage Standing Wave Ratio) alarm is raised on an RF unit's antenna branch. What does this alarm typically indicate a problem with?
Answer: D
Explanation:
Voltage Standing Wave Ratio (VSWR) measures how efficiently RF energy transmitted by the radio unit is delivered into the antenna system versus being reflected back due to an impedance mismatch. A High VSWR alarm indicates a significant mismatch on a particular antenna branch or port, commonly caused by issues such as a damaged or loose feeder cable connection, a faulty or improperly seated RF connector, moisture
/water ingress into a connector, or physical damage to an antenna element. This is a radio-frequency hardware issue on the affected branch and is entirely unrelated to NetAct server storage, core network mobility functions, or billing systems. For NOC engineers, a persistent High VSWR alarm typically signals that a field visit may be needed to inspect and repair the physical RF connections or replace damaged hardware on that antenna line, since it is a physical-layer condition not resolvable through remote configuration alone.
NEW QUESTION # 22
A NOC engineer is trying to isolate whether a fault originates in the baseband processing unit or in an RF module of an AirScale BTS. What is a useful FIRST diagnostic step?
Answer: D
Explanation:
When isolating a fault between baseband processing units and RF modules, checking the status and alarm details of the interconnecting interface - typically a CPRI or eCPRI link in AirScale architectures - between the System Module and the Radio unit is a logical first step. Alarms or abnormal status on this link can quickly reveal whether the problem lies in the connection itself (such as a fiber/cable fault or configuration mismatch) or within one of the connected components. This follows the principle of checking interfaces and boundaries before assuming a specific component has failed, avoiding unnecessary or premature hardware replacement. Replacing the antenna skips this diagnostic step entirely and risks an unwarranted field action.
Restarting NetAct is a network-wide action inappropriate for a single-site fault. Increasing transmit power to
'test' a suspected hardware issue is not a valid diagnostic method and could create interference.
NEW QUESTION # 23
Which NetAct functional area provides tools that allow an operator to apply the same parameter change consistently to multiple AirScale base stations or cells in a single operation?
Answer: B
Explanation:
NetAct's Configuration Management (CM) area provides bulk/mass update capabilities that let an operator define a parameter change once - such as updating a neighbor relation, adjusting a power parameter, or enabling a feature - and apply it consistently across many base stations or cells in a single, auditable operation. This is fundamental to standard provisioning tasks covered in remote operations, allowing large- scale configuration rollouts without logging into each element individually, while maintaining consistency and an audit trail of who changed what and when. Fault Management focuses on collecting, displaying, and correlating alarms rather than making configuration changes. Performance Management focuses on collecting and reporting KPI/counter data. Software Management can distribute and activate software packages across multiple base stations, but it does not handle parameter and configuration provisioning, which is the specific domain of Configuration Management's bulk operations tools.
NEW QUESTION # 24
Why does Nokia recommend configuring automatic session timeout (inactivity logout) for remote management sessions to AirScale base stations?
Answer: B
Explanation:
Automatic session timeout is a fundamental security control for remote management sessions. If an engineer leaves an authenticated session open and unattended - for example, stepping away from a workstation - anyone with physical or logical access to that workstation could potentially view sensitive configuration data or, more seriously, make unauthorized changes to a live base station, which could impact network stability, security, or subscriber service. Automatically terminating idle sessions after a defined inactivity period minimizes this exposure window. This control is unrelated to site power consumption and does not cause the base station itself to restart - only the management session is closed, while the BTS continues normal operation. It also has no effect on a cell's radio coverage area, which is determined entirely by RF design and configuration parameters such as transmit power and antenna settings.
NEW QUESTION # 25
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