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| Section | Objectives |
|---|---|
| Network Operations in 5G RAN | - Operations Center procedures
|
| 5G RAN Systems and Fault Management | - Alarm and fault handling
|
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NEW QUESTION # 62
Accessibility KPIs such as RRC Connection Setup Success Rate drop sharply for a single cell, while neighboring cells remain normal. What should the NOC engineer check FIRST?
Answer: C
Explanation:
When accessibility KPIs such as RRC Connection Setup Success Rate drop sharply for one specific cell while neighboring cells remain normal, the most productive investigation focuses on factors specific to that cell:
reviewing recent alarms (hardware, transport, or synchronization faults affecting only that cell) and checking the configuration management audit trail for any recent parameter change, neighbor relation update, or feature activation that coincided with the KPI drop. Because the issue is localized to a single cell rather than affecting the surrounding area broadly, it is unlikely to be caused by something network-wide such as handset operating system versions used nationwide, and it is entirely unrelated to the billing system or NetAct dashboard appearance settings. Correlating the timing of the KPI degradation with that cell's alarm history and recent CM changes is a standard, effective root-cause approach for localized accessibility issues.
NEW QUESTION # 63
The PLMN ID broadcast by a 5G cell is composed of which two elements, and what is its primary function?
Answer: C
Explanation:
The Public Land Mobile Network Identity (PLMN ID) is composed of a Mobile Country Code (MCC), which identifies the country in which the network operates, and a Mobile Network Code (MNC), which identifies the specific mobile network operator within that country. This combination is broadcast by every cell as part of its system information and is used by UEs during network selection and registration to confirm they are camping on a cell belonging to their home operator or an authorized roaming partner. Correct PLMN configuration is fundamental: an incorrect PLMN ID would cause UEs belonging to that operator to treat the cell as unsuitable, preventing any subscribers from camping on it. This is entirely separate from Cell ID/TAC (used for tracking and identification within a network), PCI (used for physical-layer cell identification), and transport-layer addressing such as IP/VLAN configuration, which serve different operational purposes.
NEW QUESTION # 64
Within NetAct, which functional module is primarily responsible for planning, distributing, and activating software packages across base stations?
Answer: B
Explanation:
The Software Management (SWM) module within NetAct is the centralized functional area responsible for the end-to-end software lifecycle of base stations and other network elements, including planning software deployment campaigns, distributing (downloading) software packages to target network elements, scheduling and triggering activation, and monitoring the success or failure of these operations across potentially large numbers of sites. This is distinct from Fault Management (FM), which handles alarms and fault conditions; Performance Management (PM), which handles KPI and counter-based performance data; and Configuration Management (CM), which handles parameter and configuration provisioning. While these modules may interact - for example, a software activation might generate alarms visible in FM, or a software change might necessitate subsequent configuration adjustments via CM - the core responsibility for managing software packages, versions, and activation campaigns rests specifically with SWM, making it the primary tool a NOC engineer would use for software lifecycle activities.
NEW QUESTION # 65
An operator is considering reducing the PM Result Output Period (ROP) for a set of cells from 15 minutes to
1 minute to enable near real-time troubleshooting. What is the most significant operational trade-off of this change?
Answer: D
Explanation:
Reducing the Result Output Period increases the frequency at which performance counters are collected, processed, and stored, which proportionally increases the volume of measurement data generated by each network element. Moving from a 15-minute to a 1-minute ROP, for example, would generate roughly fifteen times more data points over the same time period. This places significantly higher demand on the file transfer, processing, and storage capacity of NetAct and any downstream analytics systems, and can also increase signaling and processing load on the base stations themselves. While finer granularity can be valuable for short-term, targeted troubleshooting of a specific cell during an active investigation, it is not typically sustainable as a network-wide, long-term configuration. KPI formulas remain valid regardless of ROP, alarm notifications are a separate mechanism unaffected by PM ROP settings, and historical trending remains possible - it simply involves more granular data points.
NEW QUESTION # 66
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: B
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 # 67
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