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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 5G RAN Architecture and Fundamentals | 20% | - Protocol stack and interfaces
|
| Topic 2: Security and Compliance | 10% | - Security features and procedures
|
| Topic 3: Network Configuration and Management | 25% | - Parameter management and configuration
|
| Topic 4: Fault Management and Troubleshooting | 25% | - Common issues and solutions
|
| Topic 5: Performance Monitoring and Optimization | 20% | - Performance analysis and optimization
|
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NEW QUESTION # 56
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: D
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 # 57
What operational benefit does the Automatic Neighbor Relation (ANR) function provide to a NOC team managing 5G RAN configuration?
Answer: D
Explanation:
The Automatic Neighbor Relation (ANR) function reduces the manual configuration burden associated with maintaining accurate neighbor lists across a large RAN by using UE measurement reports to detect cells that UEs can actually see and successfully measure in the field. When a UE reports a previously unconfigured neighboring cell with sufficient signal quality, ANR can automatically add the appropriate neighbor relation (and, where applicable, retrieve the necessary identification information for that neighbor) so that future handovers toward that cell can be evaluated and executed. This is particularly valuable in dense, frequently changing network environments where manually planning every neighbor relation - especially across vendor or technology boundaries - would be time-consuming and error-prone. ANR does not address hardware faults, PLMN configuration, or transmit power adjustments, which are governed by separate fault management and RF parameter processes respectively, but it significantly improves the completeness and accuracy of neighbor relation databases that mobility KPIs depend on.
NEW QUESTION # 58
Before a field engineer disconnects and removes an RF unit for replacement, what action should the NOC engineer typically perform first?
Answer: A
Explanation:
Before a field engineer physically disconnects an RF unit, the NOC engineer should administratively lock the affected cell(s). Locking puts the cell into a controlled, planned out-of-service state, which has several benefits: it allows UEs currently served by the cell to be handed over or to reselect to neighboring cells in an orderly manner before the disconnection occurs, and it ensures that when the RF unit is disconnected, the resulting alarms are correctly understood by the NOC and any monitoring systems as part of a planned maintenance activity rather than an unexpected fault requiring separate investigation or triggering unnecessary alerts/escalations. Increasing neighboring cells' power is not a standard or necessary preparatory step and could introduce interference; deleting the configuration would require a full re- commissioning afterward; and changing the PLMN ID would be both ineffective at preventing the brief outage and disruptive to network identification.
NEW QUESTION # 59
Cell Availability KPI is typically calculated based on which factor?
Answer: A
Explanation:
Cell Availability is a KPI that reflects the proportion of time during a measurement period that a cell is actually capable of carrying traffic - that is, it is not blocked by an active fault condition or an administrative lock (an intentional disable for maintenance). It is typically expressed as a percentage of total elapsed time, with downtime due to either faults or planned outages subtracted from the period considered. This KPI provides a high-level view of how reliably a cell has been able to serve subscribers over time, and sustained low availability for a particular cell would prompt investigation into recurring faults or excessive planned outages. It is unrelated to the number of active NetAct user sessions, the count of software upgrades performed (although upgrades may contribute to planned downtime), or signal strength reported by an individual UE, which is a radio measurement rather than a network-wide availability statistic.
NEW QUESTION # 60
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: A
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 # 61
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