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| Certification Vendor: | Nokia |
|---|---|
| Exam Name: | Nokia 5G RAN Network Operations Expert |
| Exam Number: | NRN-522 |
| Related Certifications: | Nokia 5G RAN Network Professional (NRNP) Nokia 5G RAN Optimization Expert Nokia 5G RAN Field Operations Expert Nokia 5G RAN Design 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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Nokia NRN-522 Exam is designed to test the expertise of network professionals in operating Nokia 5G RAN (Radio Access Network) technology. Nokia is a global leader in the telecom industry, and its 5G RAN technology is at the forefront of innovation, enabling faster speeds, lower latency, and higher capacity. Therefore, passing NRN-522 Exam is a testament to one's proficiency in operating and maintaining this advanced technology.
NEW QUESTION # 86
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: A
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 # 87
In an EN-DC (E-UTRA New Radio Dual Connectivity) configuration, what role does the 5G NR cell typically play relative to the LTE cell?
Answer: D
Explanation:
EN-DC is a non-standalone (NSA) 5G deployment architecture in which a UE maintains simultaneous connections to an LTE eNB acting as the Master Node (MN) and a 5G NR gNB acting as a Secondary Node (SN). In this configuration, the LTE eNB anchors the control-plane connection to the Evolved Packet Core (EPC) and handles mobility management and signaling, while the NR cell primarily contributes additional user-plane throughput and capacity through dual connectivity, often substantially increasing the data rates available to the UE. This architecture allows operators to introduce 5G capacity using existing 4G core infrastructure, which is a common early-stage deployment strategy. Correct configuration of the EN-DC relation between the LTE and NR cells - including neighbor relations, frequency information, and capability signaling - is essential for the UE to be directed to add the secondary NR connection. EN-DC does not require identical PCI values between the LTE and NR layers, since they operate as distinct cells with independent identity spaces.
NEW QUESTION # 88
Which statement correctly distinguishes 'Integrity' KPIs from 'Accessibility' KPIs in RAN performance management?
Answer: C
Explanation:
Accessibility KPIs measure how successfully a UE can initially establish a connection or session when it attempts to do so - for example, RRC Connection Setup Success Rate. Integrity KPIs, by contrast, measure the quality and performance of a connection once it has been successfully established - for example, achievable throughput, latency, or error rates during an active session. These represent two distinct stages of user experience: first, can the user connect at all (Accessibility), and second, once connected, how good is the service (Integrity)? They are not the same category measured differently, since they address fundamentally different performance aspects and often require different troubleshooting approaches - accessibility issues often relate to admission and signaling procedures, while integrity issues often relate to radio conditions, interference, or capacity affecting data transfer. Integrity KPIs apply across all radio generations including
5G, and Accessibility is not limited solely to throughput.
NEW QUESTION # 89
Which KPI category do uplink and downlink packet loss rate counters primarily contribute to, and why are they operationally significant for a NOC team?
Answer: D
Explanation:
Packet loss rate counters fall under the Integrity KPI category, which focuses on the quality and reliability of service delivered to users during an active connection, as opposed to whether a connection can be established (Accessibility), maintained without dropping (Retainability), handed over successfully (Mobility), or whether the cell is operational at all (Availability). High packet loss directly degrades user experience for real-time applications such as voice, video, and gaming, and can also trigger retransmissions that further increase congestion and reduce effective throughput. For a NOC team, monitoring packet loss trends is operationally significant because sustained increases often correlate with transport network issues (such as congestion or errors on backhaul links), radio interference causing high error rates, or hardware degradation. Identifying and addressing rising packet loss early helps prevent broader service quality complaints and supports proactive maintenance before the issue escalates into accessibility or retainability problems.
NEW QUESTION # 90
Before rolling out a new software release across an entire region's base stations, an operator first activates it on a small subset of sites and closely monitors their performance for a period of time. What is this practice commonly called, and what is its primary benefit?
Answer: A
Explanation:
A staged or pilot rollout - sometimes referred to as a canary deployment - involves activating a new software release on a small, representative subset of sites first, then closely monitoring key indicators such as alarms, KPIs, and overall stability for a defined observation period before proceeding with wider deployment. The primary benefit of this approach is risk containment: if the new software introduces an unforeseen issue - whether a compatibility problem, a performance regression, or an unexpected interaction with certain configurations - the impact is limited to the pilot sites rather than the entire region, allowing the issue to be identified and addressed (potentially by halting further rollout) before it affects a much larger portion of the network. This practice is a software lifecycle risk-management technique and is unrelated to factory resets, configuration audits focused on PLMN consistency, or bulk parameter updates, which serve entirely different operational purposes.
NEW QUESTION # 91
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