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Nokia NRN-522 (Nokia 5G RAN Network Operations Expert) Exam is designed to test the knowledge and skills of professionals working in the field of 5G RAN network operations. NRN-522 exam is an advanced level certification that is ideal for individuals who have completed the Nokia 5G NR certification and have a few years of experience working in the 5G RAN network domain.
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Nokia NRN-522 exam covers a wide range of topics related to the Nokia 5G RAN network, including network architecture, network planning, and optimization, network element management, network security, and troubleshooting. Candidates are expected to have a thorough understanding of the 5G RAN network and its various components, including base stations, radio access network (RAN), transport network, and core network.
Nokia NRN-522 Certification Exam is designed for telecom professionals who are seeking recognition for their expertise in 5G RAN network operations. Nokia 5G RAN Network Operations Expert certification exam measures an individual’s knowledge and skills in areas such as network slicing, service orchestration, software-defined networking, and network virtualization. NRN-522 Exam also evaluates the candidate's ability to manage and operate Nokia 5G RAN networks efficiently.
NEW QUESTION # 70
A NOC engineer observes that a 5G cell's average downlink user throughput has dropped significantly, but the cell's PRB utilization remains low and no transport alarms are active. Which root cause is most consistent with these observations?
Answer: C
Explanation:
When PRB utilization is low, the cell is not resource-constrained, which rules out congestion as the cause of reduced throughput. A complete transport failure or an administrative lock would prevent the cell from carrying any traffic at all, which contradicts the scenario where the cell is still active and reporting measurements. The most consistent explanation is degraded radio conditions - for example, increased interference, reduced signal-to-noise ratio (SINR), or coverage issues - which force the scheduler to select lower-order Modulation and Coding Scheme (MCS) values for connected users. Lower MCS values mean each allocated resource block carries fewer bits, directly reducing achievable throughput even though plenty of PRB capacity remains available. Investigating MCS distribution counters and SINR-related measurements alongside checking for nearby interference sources or antenna/feeder issues would be the appropriate next troubleshooting step.
NEW QUESTION # 71
What does the NR-ARFCN (NR Absolute Radio Frequency Channel Number) represent in a 5G cell's configuration?
Answer: A
NEW QUESTION # 72
How is the Cell Availability KPI typically calculated for a reporting period, and what does this KPI primarily reflect?
Answer: D
Explanation:
Cell Availability is an Availability-category KPI that measures the proportion of a given reporting period during which a cell was operationally able to carry traffic - that is, unlocked, in service, and not blocked by a fault. It is calculated as the ratio of the time the cell was actually available to the total duration of the reporting period, expressed as a percentage. Periods of planned maintenance (administrative locking) are sometimes excluded or tracked separately from unplanned outages, depending on operator reporting policy, since the two have different operational implications. This KPI is critical for service level agreement (SLA) reporting and for identifying cells with recurring stability issues such as repeated automatic resets, hardware faults, or transport outages. It is distinct from throughput-based, handover-based, or alarm-count-based ratios, which belong to other KPI categories and answer different operational questions.
NEW QUESTION # 73
A 'Loss of Synchronization Reference' alarm appears on a 5G cell. Which input to the BTS is this alarm most directly associated with?
Answer: C
Explanation:
5G base stations require accurate frequency, and for many configurations (especially TDD operation and features like carrier aggregation) phase/time synchronization, typically derived from a GNSS receiver such as GPS or from a network-distributed timing source such as Synchronous Ethernet or PTP/IEEE 1588 over the transport network. A 'Loss of Synchronization Reference' alarm indicates the BTS has lost access to its timing source. This can lead to degraded performance and, in TDD deployments, can cause uplink/downlink timing misalignment between neighboring cells (interference), and may force the cell out of service if synchronization cannot be maintained. The correct troubleshooting focus is therefore the GNSS antenna
/receiver, related cabling, satellite visibility/obstructions, or the alternative network-based synchronization path - not neighbor relation configuration, handover KPIs, or NetAct account credentials, none of which relate to the BTS's timing reference source.
NEW QUESTION # 74
In the context of Nokia's Single RAN approach, what does it mean for a base station site's software package to support 'Single RAN'?
Answer: C
Explanation:
Single RAN is an architectural approach in which a common hardware platform - such as the AirScale System Module and associated radio units - and an integrated software package can simultaneously support multiple radio access technologies (for example, 2G, 3G, 4G, and 5G) on the same shared infrastructure, rather than requiring separate, technology-dedicated equipment for each generation. This significantly reduces the physical footprint, power consumption, and operational complexity at a site, since multiple technologies can be managed, monitored, and upgraded through unified O and M tools and processes. A Single RAN site is not restricted to a single technology - in fact, the opposite is true: it is designed specifically to host multiple technologies concurrently. It also does not require separate cabinets per technology, and it remains fully capable of receiving ongoing software upgrades and lifecycle management like any other deployment, with Single RAN describing the architectural integration rather than a static, unchangeable state.
NEW QUESTION # 75
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