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| Section | Objectives |
|---|---|
| Topic 1: Software Management | - Base Station Software Operations
|
| Topic 2: 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Topic 3: Fault and Alarm Management | - Monitoring and Troubleshooting
|
| Topic 4: Configuration Management | - Parameter Administration
|
| Topic 5: Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
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NEW QUESTION # 108
NetAct reports the transport link to a remote 5G site as 'up', but the NOC engineer still cannot establish an OandM session to the AirScale BTS. What is the MOST appropriate next troubleshooting step?
Answer: B
Explanation:
When basic transport/IP connectivity to a site is confirmed as up but an O and M management session still cannot be established, the issue is likely at a higher layer than physical or network-layer reachability.
Common causes include expired or mismatched security certificates, incorrect login credentials, or a misconfigured O and M IP address or management VLAN on the base station itself. A layered troubleshooting approach moves from transport, to network, to application/management-layer checks once lower layers are confirmed functional. Replacing the RF module addresses a hardware radio issue, not an O and M session
/authentication problem, and would be premature without further evidence. Adjusting reference signal power is unrelated to management connectivity. Restarting the entire NetAct server is a drastic action affecting the whole managed network and is never an appropriate first response to a single-site connectivity issue.
NEW QUESTION # 109
A NOC engineer needs to open an interactive command-line session directly to an AirScale BTS for advanced diagnostics. Which protocol should be used to comply with Nokia's secure remote access guidelines?
Answer: D
Explanation:
SSH (Secure Shell) is the protocol mandated for interactive command-line access to AirScale base stations because it encrypts the entire session, including login credentials, commands, and output, protecting it from interception as it traverses the wide-area transport network between the Operations Center and the remote site. Telnet transmits all data, including usernames and passwords, in plain text and is explicitly disallowed on production network elements due to the severe security risk. HTTP may be used for some web-based management interfaces but is not the standard for direct CLI diagnostic sessions, and plain HTTP itself is also insecure unless using HTTPS. SNMPv1 is an older management protocol used for polling status and traps, lacks strong authentication and encryption, and is not used for interactive shell sessions. Nokia's hardening guidelines for remote operations require encrypted management protocols such as SSH for all direct element access.
NEW QUESTION # 110
What does the NR-ARFCN (NR Absolute Radio Frequency Channel Number) represent in a 5G cell's configuration?
Answer: D
Explanation:
The NR Absolute Radio Frequency Channel Number (NR-ARFCN) is a standardized numbering scheme defined for 5G NR that maps specific numeric values to corresponding carrier frequencies across the supported frequency range. When configuring a cell, the NR-ARFCN value (rather than specifying the frequency directly in MHz) is used to unambiguously identify the exact carrier frequency the cell will operate on, ensuring consistency across equipment from different vendors and alignment with regulatory frequency allocations. Correct NR-ARFCN configuration is essential for frequency planning, neighbor relation setup (since inter-frequency relations reference the target cell's frequency), and avoiding interference with adjacent operators or bands. This parameter is unrelated to subscriber database identifiers, alarm counts, or PRB utilization, all of which are tracked through entirely separate configuration management, fault management, or performance management mechanisms respectively.
NEW QUESTION # 111
A cell consistently shows PRB utilization above 90% during peak hours, along with a rising number of RRC Connection Rejections due to insufficient resources. What does this combination of indicators most strongly suggest?
Answer: A
Explanation:
Sustained PRB utilization above roughly 90% indicates that nearly all available radio resources in the cell are being consumed, leaving little headroom for new connections or additional traffic. When this is combined with an increasing rate of RRC Connection Rejections specifically attributed to insufficient resources, it strongly indicates that the cell's admission control function is actively rejecting new connection attempts because demand exceeds available capacity - a clear signature of capacity congestion during busy periods.
This is fundamentally different from a hardware fault (which would typically generate equipment alarms and affect availability rather than just capacity), a synchronization loss (which affects timing-sensitive operations and often triggers specific sync alarms), or a neighbor relation issue (which would primarily affect mobility KPIs). Recognizing this pattern is important because it points toward capacity planning actions - such as carrier expansion, load balancing, or additional sectorization - rather than fault remediation.
NEW QUESTION # 112
What best describes the role of 'remote piloting' as performed by a NOC engineer supporting a field engineer during an on-site hardware replacement?
Answer: D
Explanation:
Remote piloting describes a collaborative working model in which a NOC engineer, using centralized O and M tools such as NetAct and element managers, actively supports a field engineer performing physical work at a site. The NOC engineer's responsibilities typically include preparing the network element for the activity (such as locking affected cells), providing real-time guidance based on system status and diagnostic data, performing remote verification steps (such as confirming a replaced module is detected and operating correctly), and executing any remote configuration steps the new hardware requires. This combination of remote expertise and on-site physical capability allows complex maintenance to be carried out efficiently without requiring every engineer involved to have both deep RAN engineering and bring physically present. It is an active, collaborative role - not a passive one - and it relates only to the technical task at hand, not to logistics such as travel arrangements.
NEW QUESTION # 113
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