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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Fault Management and Troubleshooting | 25% | - Common issues and solutions
|
| Topic 2: 5G RAN Architecture and Fundamentals | 20% | - 5G RAN logical and physical architecture
|
| Topic 3: Performance Monitoring and Optimization | 20% | - Key performance indicators (KPIs)
|
| Topic 4: Security and Compliance | 10% | - Security features and procedures
|
| Topic 5: Network Configuration and Management | 25% | - Software management and upgrades
|
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NEW QUESTION # 71
Before applying a significant parameter change to a live production cell, what best practice should a NOC engineer follow regarding the cell's current configuration?
Answer: A
Explanation:
Taking a configuration backup or snapshot of the current parameter settings before applying a significant change is a fundamental change management best practice. If the new configuration causes unexpected behavior - such as degraded KPIs, connectivity issues, or unintended interactions with other parameters - having a known-good baseline allows the engineer to quickly roll back to the previous configuration, minimizing service impact and downtime while the root cause is investigated. While some configuration management tools may offer change history or versioning features, relying solely on this without an explicit pre-change backup is risky, and the assumption that changes are always automatically and fully reversible is incorrect. Deleting the existing configuration before applying a new one is highly disruptive and would cause an outage. Disabling alarm reporting during a change is dangerous, as it would prevent the NOC from detecting genuine problems introduced by the change itself, undermining the very monitoring needed to assess the change's impact.
NEW QUESTION # 72
After a remote configuration change causes unexpected cell behavior, and the automatic fallback mechanism does not fully resolve the issue, what is the most appropriate next step for the NOC engineer?
Answer: A
Explanation:
When a configuration change leads to unexpected behavior and any automatic fallback does not fully restore normal operation, the appropriate recovery action is to restore the affected network element's configuration from the most recent verified backup taken before the change was applied. This returns the element to its known-working state, addressing the immediate service impact while the root cause of the unexpected behavior from the new configuration can be investigated separately, outside of the live production environment if needed. This is precisely why taking and verifying a pre-change backup is emphasized as a best practice - it provides exactly this kind of recovery option. Decommissioning the cell is a drastic and disproportionate response to a configuration issue; applying an unrelated template introduces further uncertainty and risk; and taking no action prolongs any service degradation unnecessarily, which is inconsistent with the NOC's responsibility to restore service promptly.
NEW QUESTION # 73
What does the term 'Single RAN' refer to in the context of Nokia AirScale base stations?
Answer: A
Explanation:
Single RAN describes Nokia's architecture in which a common AirScale hardware platform - including the System Module and compatible radio units - can run multiple radio access technologies (2G GSM, 3G WCDMA, 4G LTE, and 5G NR) concurrently on the same site, with the technology mix and capacity determined by software configuration and licensing rather than separate dedicated hardware per generation.
This dramatically simplifies site footprint, power usage, and lifecycle management, and allows 5G to be introduced onto existing sites by adding software/capacity rather than deploying entirely new cabinets. It is unrelated to antenna count limits or SIM card types, and AirScale platforms also support multi-operator RAN sharing, so it does not restrict usage to a single operator. For NOC personnel, Single RAN means configuration, fault, and software management for several technologies may be addressed through the same base station and management session.
NEW QUESTION # 74
Which of the following best describes 'fault isolation' as performed by NOC technical support before deciding whether to dispatch a field engineer?
Answer: D
Explanation:
Fault isolation is the systematic process by which NOC technical support narrows down the likely location and cause of a fault using all available remote diagnostic information, before deciding whether a remote fix is possible or a field dispatch is required. This includes reviewing active alarms and their correlation (distinguishing root-cause from symptom alarms), examining relevant performance management data for anomalies, checking the status of interfaces between functional domains such as baseband-to-RF links or transport interfaces, and reviewing element logs where available. The goal is to determine whether the fault most likely resides in the baseband processing unit, an RF module, the transport network, or an external
/environmental factor such as power or cooling, so that any field dispatch is properly scoped with the correct parts, tools, and instructions. Randomly replacing components, assuming a full rebuild is always needed, or ignoring correlation data are inefficient approaches that proper fault isolation is designed to avoid.
NEW QUESTION # 75
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 # 76
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