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| Section | Weight | Objectives |
|---|---|---|
| Fault Management and Troubleshooting | 25% | - Alarm and fault handling
|
| Performance Monitoring and Optimization | 20% | - Performance analysis and optimization
|
| Security and Compliance | 10% | - Security features and procedures
|
| 5G RAN Architecture and Fundamentals | 20% | - 5G RAN logical and physical architecture
|
| Network Configuration and Management | 25% | - Parameter management and configuration
|
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NEW QUESTION # 23
What is the primary purpose of the Xn interface in a 5G RAN architecture?
Answer: D
Explanation:
The Xn interface is the logical interface that connects neighboring gNBs (5G base stations) directly to one another, serving a role analogous to the X2 interface in 4G LTE. Its primary purpose is to support mobility- related signaling and data exchange between gNBs - most notably during handover procedures, where the source and target gNB use the Xn interface to coordinate the handover, exchange context information about the UE, and forward any buffered downlink user-plane data to minimize service interruption during the transition. The Xn interface can also carry information used for interference management and load balancing between neighboring cells. It is distinct from interfaces connecting the gNB to the core network (such as the NG interface), from intra-base-station interfaces like CPRI/eCPRI connecting baseband and RF units, and from the O and M connectivity used for software management, each of which serves a different architectural function within the overall RAN system.
NEW QUESTION # 24
Which KPI category includes the RRC Connection Setup Success Rate, which reflects a UE's ability to successfully gain initial access to the network?
Answer: C
Explanation:
Accessibility KPIs measure a UE's ability to successfully access network services when requested. RRC (Radio Resource Control) Connection Setup Success Rate is a foundational accessibility metric in 4G/5G, representing the percentage of RRC connection setup attempts - the first step a UE takes to establish a radio connection with the gNB - that complete successfully. A high accessibility value indicates subscribers can reliably initiate sessions when they attempt to. This differs from Retainability, which measures whether already-established connections remain stable until normally released; Mobility, which assesses handover performance as UEs move between cells; and Integrity, which assesses the quality and throughput of an established connection. Because RRC setup is the entry point to accessing the network, its success rate falls within Accessibility, a category NOC engineers monitor closely to detect access-related problems caused by congestion, misconfiguration, or hardware faults preventing initial connections.
NEW QUESTION # 25
In an EN-DC (E-UTRA New Radio Dual Connectivity) configuration, what role does the 5G NR cell typically play relative to the LTE cell?
Answer: A
Explanation:
EN-DC is a non-standalone (NSA) 5G deployment architecture in which a UE maintains simultaneous connections to an LTE eNB acting as the Master Node (MN) and a 5G NR gNB acting as a Secondary Node (SN). In this configuration, the LTE eNB anchors the control-plane connection to the Evolved Packet Core (EPC) and handles mobility management and signaling, while the NR cell primarily contributes additional user-plane throughput and capacity through dual connectivity, often substantially increasing the data rates available to the UE. This architecture allows operators to introduce 5G capacity using existing 4G core infrastructure, which is a common early-stage deployment strategy. Correct configuration of the EN-DC relation between the LTE and NR cells - including neighbor relations, frequency information, and capability signaling - is essential for the UE to be directed to add the secondary NR connection. EN-DC does not require identical PCI values between the LTE and NR layers, since they operate as distinct cells with independent identity spaces.
NEW QUESTION # 26
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 # 27
What is the purpose of license management functionality within NetAct as it relates to base station software and features?
Answer: B
Explanation:
License management within NetAct provides centralized tracking and administration of license keys and entitlements that govern which optional features, capacity thresholds, or performance levels are enabled on individual network elements. Because software capability and commercial licensing are often separated - meaning a base station may have software installed that is technically capable of supporting a feature, but the feature remains inactive until the corresponding license is applied - license management ensures that the correct entitlements are deployed, tracked for expiration or renewal, and can be audited across the network.
This is important for NOC teams when troubleshooting why an expected feature is not functioning, as a missing or expired license is a common cause distinct from a software or configuration fault. License management has no role in tracking physical spare parts inventory, PLMN ID assignment (a configuration management function), or scheduling site maintenance visits, all of which are handled through separate processes.
NEW QUESTION # 28
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