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Nokia NRN-522 (Nokia 5G RAN Network Operations Expert) Certification Exam is designed to test the skills and knowledge of professionals working in the field of 5G Radio Access Network (RAN) operations. NRN-522 exam covers a wide range of topics, including 5G RAN architecture, network planning and optimization, performance monitoring and troubleshooting, and security management. It is a comprehensive certification that aims to verify a candidate's ability to design, deploy, and maintain 5G RAN networks using Nokia equipment and technologies.
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Nokia NRN-522 Certification Exam carries significant importance in the industry as Nokia is one of the leading telecom equipment vendors worldwide with a history of more than 150 years in the industry. Nokia 5G RAN Network Operations Expert certification is widely recognized by the telecom community as a benchmark for 5G RAN expertise and knowledge. Certification holders are expected to play key roles in managing and optimizing the performance of 5G RAN networks.
NEW QUESTION # 22
What does the NR-ARFCN (NR Absolute Radio Frequency Channel Number) represent in a 5G cell's configuration?
Answer: B
Explanation:
The NR Absolute Radio Frequency Channel Number (NR-ARFCN) is a standardized numbering scheme defined for 5G NR that maps specific numeric values to corresponding carrier frequencies across the supported frequency range. When configuring a cell, the NR-ARFCN value (rather than specifying the frequency directly in MHz) is used to unambiguously identify the exact carrier frequency the cell will operate on, ensuring consistency across equipment from different vendors and alignment with regulatory frequency allocations. Correct NR-ARFCN configuration is essential for frequency planning, neighbor relation setup (since inter-frequency relations reference the target cell's frequency), and avoiding interference with adjacent operators or bands. This parameter is unrelated to subscriber database identifiers, alarm counts, or PRB utilization, all of which are tracked through entirely separate configuration management, fault management, or performance management mechanisms respectively.
NEW QUESTION # 23
A NOC engineer needs to open an interactive command-line session directly to an AirScale BTS for advanced diagnostics. Which protocol should be used to comply with Nokia's secure remote access guidelines?
Answer: B
Explanation:
SSH (Secure Shell) is the protocol mandated for interactive command-line access to AirScale base stations because it encrypts the entire session, including login credentials, commands, and output, protecting it from interception as it traverses the wide-area transport network between the Operations Center and the remote site. Telnet transmits all data, including usernames and passwords, in plain text and is explicitly disallowed on production network elements due to the severe security risk. HTTP may be used for some web-based management interfaces but is not the standard for direct CLI diagnostic sessions, and plain HTTP itself is also insecure unless using HTTPS. SNMPv1 is an older management protocol used for polling status and traps, lacks strong authentication and encryption, and is not used for interactive shell sessions. Nokia's hardening guidelines for remote operations require encrypted management protocols such as SSH for all direct element access.
NEW QUESTION # 24
A cell consistently shows PRB utilization above 90% during peak hours, along with a rising number of RRC Connection Rejections due to insufficient resources. What does this combination of indicators most strongly suggest?
Answer: C
Explanation:
Sustained PRB utilization above roughly 90% indicates that nearly all available radio resources in the cell are being consumed, leaving little headroom for new connections or additional traffic. When this is combined with an increasing rate of RRC Connection Rejections specifically attributed to insufficient resources, it strongly indicates that the cell's admission control function is actively rejecting new connection attempts because demand exceeds available capacity - a clear signature of capacity congestion during busy periods.
This is fundamentally different from a hardware fault (which would typically generate equipment alarms and affect availability rather than just capacity), a synchronization loss (which affects timing-sensitive operations and often triggers specific sync alarms), or a neighbor relation issue (which would primarily affect mobility KPIs). Recognizing this pattern is important because it points toward capacity planning actions - such as carrier expansion, load balancing, or additional sectorization - rather than fault remediation.
NEW QUESTION # 25
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: C
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 # 26
Why is an automatic fallback (rollback) mechanism important when activating new software on a base station?
Answer: B
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 # 27
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