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| Section | Objectives |
|---|---|
| Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Fault and Alarm Management | - Monitoring and Troubleshooting
|
| Configuration Management | - Parameter Administration
|
| Software Management | - Base Station Software Operations
|
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NEW QUESTION # 116
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 # 117
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: B
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 # 118
During a remote piloting session, what communication practice is most important for the NOC engineer and field engineer to follow to ensure tasks are completed safely and correctly?
Answer: D
Explanation:
Effective remote piloting depends on clear, step-by-step communication where each action - whether performed by the field engineer physically or the NOC engineer remotely - is confirmed as complete before the next dependent step proceeds. This sequential confirmation approach ensures that both parties maintain an accurate, shared understanding of the site's current state at every point in the procedure, which is critical for both safety (for example, confirming a cell is locked before physical work begins near an antenna) and technical correctness (for example, confirming a physical connection has been made before the NOC engineer attempts to verify it remotely). Providing all instructions upfront without ongoing confirmation risks steps being missed, performed out of order, or performed before prerequisite conditions are met. Relying solely on non-real-time communication such as email is impractical for time-sensitive coordination, and allowing the field engineer to proceed entirely independently removes the collaborative verification that makes remote piloting effective and safe.
NEW QUESTION # 119
Which KPI category do uplink and downlink packet loss rate counters primarily contribute to, and why are they operationally significant for a NOC team?
Answer: A
Explanation:
Packet loss rate counters fall under the Integrity KPI category, which focuses on the quality and reliability of service delivered to users during an active connection, as opposed to whether a connection can be established (Accessibility), maintained without dropping (Retainability), handed over successfully (Mobility), or whether the cell is operational at all (Availability). High packet loss directly degrades user experience for real-time applications such as voice, video, and gaming, and can also trigger retransmissions that further increase congestion and reduce effective throughput. For a NOC team, monitoring packet loss trends is operationally significant because sustained increases often correlate with transport network issues (such as congestion or errors on backhaul links), radio interference causing high error rates, or hardware degradation. Identifying and addressing rising packet loss early helps prevent broader service quality complaints and supports proactive maintenance before the issue escalates into accessibility or retainability problems.
NEW QUESTION # 120
A NOC engineer is investigating subscriber complaints of being unable to access data services even though their devices show a strong 5G signal and successfully camp on the cell. Which KPI should the engineer examine first to determine whether the issue lies in establishing the data bearer itself?
Answer: B
Explanation:
If a device successfully camps on a cell and shows strong signal levels but cannot access data services, the issue most likely lies beyond the initial radio connection - specifically in establishing the data bearer (PDU session in 5G, analogous to E-RAB in 4G) required to carry user-plane traffic to the core network. The PDU Session/E-RAB Setup Success Rate KPI directly measures how often these bearer establishment procedures succeed, and a low value points to problems such as core network signaling failures, transport issues toward the user-plane gateway, configuration mismatches, or resource allocation failures at the RAN. Cell Availability simply confirms the cell is operational, Handover Success Rate is only relevant once a session is active and mobility occurs, and strong RSRP only confirms good radio coverage - none of these directly explain a failure to establish the data session itself, making the PDU Session/E-RAB Setup Success Rate the correct first KPI to examine.
NEW QUESTION # 121
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