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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 5G RAN Architecture and Fundamentals | 20% | - 5G RAN logical and physical architecture
|
| Topic 2: Security and Compliance | 10% | - Security features and procedures
|
| Topic 3: Performance Monitoring and Optimization | 20% | - Performance analysis and optimization
|
| Topic 4: Fault Management and Troubleshooting | 25% | - Common issues and solutions
|
| Topic 5: Network Configuration and Management | 25% | - Software management and upgrades
|
>> Valid NRN-522 Test Questions <<
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NEW QUESTION # 61
What is the primary purpose of the Tracking Area Code (TAC) configured on a 5G cell?
Answer: C
Explanation:
The Tracking Area Code (TAC) is a configuration parameter that groups one or more cells into a Tracking Area, which the core network uses to manage UE location tracking while a device is in idle mode. When a UE moves between cells within the same Tracking Area, it does not need to perform a tracking area update, reducing signaling overhead. When a UE moves to a cell with a different TAC, it triggers a tracking area update procedure so the core network knows which area to page the UE in when there is incoming traffic.
Proper TAC planning is important: areas that are too large can increase paging load across many cells, while areas that are too small can increase signaling load from frequent tracking area updates. TAC has no relationship to hardware vendor identification, transmit power limits, or software versioning, which are configured and managed through entirely separate parameters and processes.
NEW QUESTION # 62
Before performing a remote software upgrade on a base station, what should a NOC engineer ensure has been completed regarding the site's current state?
Answer: D
Explanation:
Taking and verifying a current configuration and software backup before a remote software upgrade is a fundamental pre-upgrade step. This backup captures the site's known-working state - including its current software load and configuration parameters - immediately before changes are introduced. If the upgrade fails, results in unexpected behavior, or the automatic fallback mechanism does not fully restore normal operation, this backup provides a verified restore point that the NOC can use to recover the site to its prior working condition, minimizing downtime and avoiding the need for a more disruptive recovery process such as a full re-commissioning. Deleting alarm history, changing the PLMN ID, or removing neighbor relations are not standard or appropriate pre-upgrade steps; they would either destroy useful troubleshooting history, disrupt subscriber service through incorrect network identification, or unnecessarily degrade mobility performance, none of which relate to safely preparing for a software upgrade.
NEW QUESTION # 63
A NOC engineer is considering performing a remote factory reset on a base station as a troubleshooting step for a persistent issue. What is the most significant risk of this action if performed without proper preparation?
Answer: A
Explanation:
A factory reset typically returns a network element to its default, out-of-the-box configuration state, which generally means erasing the unit's current operational configuration - including cell parameters, neighbor relations, and other site-specific provisioning. If performed without first ensuring a verified, complete configuration backup is available, this action can leave the site without the configuration needed to resume normal operation, requiring a time-consuming restoration from backup or, in the worst case, a full re- commissioning process involving significant manual effort. Given this risk, a factory reset is generally considered a last-resort troubleshooting action, used only when less drastic remote troubleshooting steps have been exhausted, and only after confirming that a usable backup exists and that the operational impact (likely requiring an extended outage for the affected cells) is acceptable and properly scheduled. The action does not automatically create its own backup, nor is its impact limited to cosmetic indicators - it directly affects the unit's operational state.
NEW QUESTION # 64
When a software package is transferred to a base station via SFTP as part of a remote software delivery, what is the purpose of performing a checksum verification on the downloaded file before activation?
Answer: B
Explanation:
A checksum (or hash value) verification compares a calculated value derived from the downloaded software file against an expected reference value provided by the software source. If the values match, this confirms that the file was transferred completely and without corruption or unauthorized modification during the transfer process - which is particularly important for large software images transferred over networks where transient errors, interruptions, or transmission issues can occasionally cause partial or corrupted downloads.
Activating a software package from a corrupted or incomplete file could lead to activation failures, unpredictable behavior, or a unit that fails to return to normal operation - even before any compatibility or configuration considerations come into play. Checksum verification is a foundational integrity check performed as part of the software delivery process and has no relationship to programming language translation, geographic location determination, or performance KPI calculations, which are entirely unrelated functions.
NEW QUESTION # 65
When planning the channel bandwidth and subcarrier spacing for a 5G cell, what is the primary operational impact of these parameters?
Answer: D
Explanation:
Channel bandwidth and subcarrier spacing are fundamental radio configuration parameters that together determine how many Physical Resource Blocks (PRBs) are available within a cell's carrier. Since PRBs are the basic units of radio resource that the scheduler allocates to UEs for both downlink and uplink transmissions, the number of available PRBs directly determines the cell's theoretical capacity - that is, how much traffic the cell can serve simultaneously before becoming congested. A wider channel bandwidth provides more PRBs and therefore greater capacity, while subcarrier spacing affects the size of each PRB in the frequency domain and has implications for latency and mobility performance at different frequency ranges. These parameters are foundational to capacity planning and must be configured consistently with the operator's spectrum holdings and regulatory allocations. They have no bearing on PLMN/TAC identifiers, alarm severity configuration, or O and M transport security, which are governed by entirely separate configuration domains.
NEW QUESTION # 66
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