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| Section | Objectives |
|---|---|
| 5G RAN Systems and Fault Management | - Software and configuration management
|
| Network Operations in 5G RAN | - Operations Center procedures
|
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NEW QUESTION # 119
What is the primary purpose of performing a configuration audit that compares a live network element's current parameter settings against an approved configuration baseline or template?
Answer: D
Explanation:
A configuration audit compares the actual, currently applied parameter settings on a live network element against a reference baseline or approved configuration template that represents the intended, standardized configuration for that element type or role. The primary purpose of this comparison is to detect configuration drift - differences that may have arisen from unauthorized manual changes, incomplete rollbacks, errors during bulk updates, or undocumented local modifications. Identifying such deviations is important for maintaining configuration integrity across the network, ensuring consistent behavior across similar cells, supporting troubleshooting (since unexpected parameter values are a common root cause of localized issues), and meeting internal governance or regulatory compliance requirements around change control. This process is distinct from performance monitoring (PRB utilization, handover success rate), which relies on PM counters, and from fault management, which tracks active alarms - configuration audits specifically address the state of configuration parameters themselves.
NEW QUESTION # 120
After successfully completing a significant remote configuration change on a base station and confirming normal operation, what additional lifecycle management step should the NOC team perform?
Answer: D
Explanation:
Once a significant configuration change has been successfully applied and verified - meaning the network element is operating normally with the new configuration in place - it is good practice to take an updated backup reflecting this new state. This becomes the new baseline restore point for any future changes, ensuring that if a subsequent change needs to be rolled back, the rollback target reflects the current, correct configuration rather than an outdated one that no longer matches the network element's intended state.
Restoring the previous backup immediately after a successful change would simply undo the work just completed, which is counterproductive. Deleting backups removes valuable recovery options and is contrary to good change management practice. Disabling the element's connection to NetAct would prevent the NOC from performing any future monitoring, fault management, or configuration activities on that element, which is operationally undesirable and unrelated to good post-change practice.
NEW QUESTION # 121
Why is it considered a best practice to verify the integrity of a configuration or software backup file shortly after it is created, rather than assuming the backup process completed successfully?
Answer: B
Explanation:
A backup operation reporting a successful completion status does not always guarantee that the resulting backup file is complete, uncorrupted, and usable for a future restore - issues such as interrupted transfers, storage errors, or partial writes can sometimes occur without being immediately obvious. The critical risk is that such problems are often only discovered at the moment a restore is actually needed - typically during a recovery from a failed upgrade or configuration change - at which point the absence of a usable backup severely limits recovery options and can significantly extend an outage. For this reason, verifying backup integrity (for example, through checksum validation, file size checks, or test restores where feasible) shortly after creation is considered a best practice, ensuring that if a restore is ever needed, the backup can be relied upon. Backup verification has no relationship to KPI performance, alarm display functionality, or causing repeated restarts - its sole purpose is to confirm the backup's usability for recovery.
NEW QUESTION # 122
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 # 123
While remotely piloting an RF unit replacement, the NOC engineer notices the new unit is detected but the cell fails to come into service, with an alarm indicating a CPRI/eCPRI configuration mismatch. What is a likely cause that the NOC and field engineer should jointly investigate?
Answer: B
Explanation:
A CPRI/eCPRI configuration mismatch alarm following a hardware replacement often indicates that the physical connection topology does not align with what the system's configuration expects - commonly because the replacement RF unit was connected to a different physical port on the baseband module than the original unit occupied. Since configuration data often references specific port mappings to associate logical cell configurations with specific physical RF unit connections, a port mismatch can prevent the system from correctly associating the detected hardware with the expected configuration, resulting in the cell failing to come into service despite the link being physically established. The NOC engineer should work with the field engineer to confirm exactly which physical port the new unit is connected to and compare this against the expected port mapping in the configuration, correcting either the physical connection or the configuration as appropriate. Cosmetic details such as cable ties or paint color, and unrelated identifiers like PLMN ID, have no bearing on this type of technical mismatch.
NEW QUESTION # 124
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