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| Certification Vendor: | Nokia |
|---|---|
| Exam Name: | Nokia 5G RAN Network Operations Expert |
| Exam Number: | NRN-522 |
| Real Exam Qty: | 55-65 |
| Certificate Validity Period: | 3 years |
| Passing Score: | 70% |
| Exam Price: | 250 USD |
| Available Languages: | English |
| Exam Duration: | 90 minutes |
| Related Certifications: | Nokia Certified 5G RAN Field Operations Expert Nokia Certified 5G RAN Design Expert Nokia Certified 5G RAN Optimization Expert |
| Exam Format: | Drag and Drop, Multiple Choice, Scenario-based |
| Recommended Training: | Nokia 5G RAN Network Operations Training Course |
| Exam Registration: | Pearson VUE Nokia Training & Certification Portal |
| Sample Questions: | Nokia NRN-522 Sample Questions |
| Exam Way: | Online proctored or onsite at authorized test centers |
| Pre Condition: | Recommended: Nokia Certified 5G RAN Professional level certification or equivalent experience; no mandatory prerequisites |
| Official Syllabus URL: | https://www.nokia.com/networks/training/5g/ran/certifications/expert/ |
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Nokia NRN-522 (Nokia 5G RAN Network Operations Expert) Certification Exam is a comprehensive assessment designed to test the skills and knowledge of professionals who work with Nokia's 5G Radio Access Network (RAN) technology. NRN-522 Exam is intended for individuals who are experienced in the field of 5G RAN network operations and wish to demonstrate their expertise and proficiency in this area.
NEW QUESTION # 112
Which of the following best describes 'fault isolation' as performed by NOC technical support before deciding whether to dispatch a field engineer?
Answer: C
Explanation:
Fault isolation is the systematic process by which NOC technical support narrows down the likely location and cause of a fault using all available remote diagnostic information, before deciding whether a remote fix is possible or a field dispatch is required. This includes reviewing active alarms and their correlation (distinguishing root-cause from symptom alarms), examining relevant performance management data for anomalies, checking the status of interfaces between functional domains such as baseband-to-RF links or transport interfaces, and reviewing element logs where available. The goal is to determine whether the fault most likely resides in the baseband processing unit, an RF module, the transport network, or an external
/environmental factor such as power or cooling, so that any field dispatch is properly scoped with the correct parts, tools, and instructions. Randomly replacing components, assuming a full rebuild is always needed, or ignoring correlation data are inefficient approaches that proper fault isolation is designed to avoid.
NEW QUESTION # 113
When planning a maintenance window for a software activation affecting multiple cells at a site, which factor is most important for the NOC team to consider in order to minimize subscriber impact?
Answer: D
Explanation:
Because software activation typically requires affected cells to restart, briefly interrupting service for any actively connected UEs, the most important factor in selecting a maintenance window is identifying a time period when traffic at the site is at its lowest, based on historical traffic pattern analysis. Sites can have different busy-hour profiles depending on their location and the population they serve - for example, a site near a business district may have low traffic late at night, while a site in a residential entertainment area might have different patterns - so generic assumptions about 'off-peak' hours should ideally be validated against actual historical data for that specific site. Software version numbers, PLMN IDs, and current alarm counts have no inherent relationship to traffic levels and should not be used as proxies for determining the best maintenance window; traffic pattern data is the relevant and reliable input for this planning decision.
NEW QUESTION # 114
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: B
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 # 115
Which file transfer protocol does Nokia recommend for securely delivering software packages, license files, and configuration backups to and from AirScale base stations during remote operations?
Answer: C
Explanation:
SFTP (SSH File Transfer Protocol) runs over an encrypted SSH session, protecting both the transferred files and the authentication credentials used to access the base station, making it the recommended method for remote software delivery, license file transfer, and configuration backup/restore operations on AirScale equipment. Plain FTP transmits both data and login credentials in clear text and is considered unsuitable for production network operations due to the security exposure. TFTP provides no authentication mechanism at all and is generally limited to local, trusted bootstrapping or recovery scenarios rather than wide-area remote software delivery. SMTP is an email transport protocol and is unrelated to file transfer with network elements. Using SFTP ensures that base station software lifecycle activities - including remote updates and patch application performed from a centralized Operations Center - occur over a secure, end-to-end encrypted channel.
NEW QUESTION # 116
What is the primary purpose of the Xn interface in a 5G RAN architecture?
Answer: A
Explanation:
The Xn interface is the logical interface that connects neighboring gNBs (5G base stations) directly to one another, serving a role analogous to the X2 interface in 4G LTE. Its primary purpose is to support mobility- related signaling and data exchange between gNBs - most notably during handover procedures, where the source and target gNB use the Xn interface to coordinate the handover, exchange context information about the UE, and forward any buffered downlink user-plane data to minimize service interruption during the transition. The Xn interface can also carry information used for interference management and load balancing between neighboring cells. It is distinct from interfaces connecting the gNB to the core network (such as the NG interface), from intra-base-station interfaces like CPRI/eCPRI connecting baseband and RF units, and from the O and M connectivity used for software management, each of which serves a different architectural function within the overall RAN system.
NEW QUESTION # 117
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