當前 Nokia 作爲企業資訊解決方案的重要性及緊要性與日俱增，相關的工作機會將會越來越多，對技術能力的要求也越來越被企業作爲面試的一個標準，所以不管在哪個行業，Nokia 工作者都必須不斷自我學習、接受訓練課程或是參加各式的專業認證來充實自己，使自己在工作上可以更加得心應手。而通過了Nokia NRN-522 認證考試，證明你的IT專業知識很強，有很強的能力，可以勝任一份很好的工作。
| Section | Objectives |
|---|---|
| Topic 1: Network Operations in 5G RAN | - Remote operation of 5G Radio Access Network
|
| Topic 2: 5G RAN Systems and Fault Management | - Software and configuration management
|
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問題 #80
NetAct shows an AirScale gNB as 'Connection Lost' although there has been no reported power outage at the site. What should the NOC engineer check FIRST?
答案：B
解題說明：
A complete loss of O and M connectivity status in NetAct, without an associated power loss, most commonly indicates a problem in the IP path between the management system and the site - such as a backhaul
/transport link failure, a routing misconfiguration, a firewall rule change, or a fault on the site router or switch. Standard remote troubleshooting methodology follows a layered, 'isolate before escalate' approach:
confirm basic transport and IP reachability first (for example, checking link status, ping/traceroute results to the site's O and M address) before investigating radio-related items. RF unit VSWR, PCI configuration, and antenna tilt are radio-domain parameters that would not cause a total O and M connectivity loss, and checking them first would waste time and delay resolution. Verifying the transport path quickly narrows the fault domain and determines whether the issue can be resolved remotely or requires field dispatch.
問題 #81
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?
答案：D
解題說明：
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change needs to be rolled back, the rollback target reflects the current, correct configuration rather than an outdated one that no longer matches the network element's intended state.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.
問題 #82
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?
答案：D
解題說明：
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.
問題 #83
After a field engineer replaces a Tower Mounted Amplifier (TMA), what remote check should the NOC engineer perform to confirm the new TMA is correctly configured and operating within expected parameters?
答案：D
解題說明：
A Tower Mounted Amplifier (TMA) is an Antenna Line Device that, like a RET unit, communicates over the AISG bus and has configurable operational parameters - notably its gain settings (which affect uplink signal amplification) and bias/power settings. After a TMA replacement, the appropriate remote verification is to confirm the new unit is detected on the AISG bus (confirming physical and communication-layer connectivity) and that its gain and bias settings can be read and correspond to the values expected for that antenna line's configuration, ensuring the device is operating within the parameters the radio link design assumes. Incorrect TMA gain settings can affect uplink sensitivity and noise figure, impacting uplink performance KPIs. Physical attributes such as housing color or weight have no bearing on functional verification, and TMA replacement has no relationship to the cell's PLMN ID, which is a network identity parameter entirely independent of antenna line equipment.
問題 #84
A NOC team uses NetAct to download a new software package to a group of base stations during business hours, but schedules the activation of that software for later that night. What is the primary operational benefit of this 'download now, activate later' approach?
答案：C
解題說明：
Software lifecycle management for base stations typically separates the download (transfer) phase from the activation phase, because each has different operational implications. Downloading a software package involves transferring a potentially large file to the base station's storage, which consumes transport bandwidth and storage I/O but does not itself interrupt the cell's current operation, since the existing software load continues running unaffected. Activation, by contrast, involves switching to the new software load, which typically requires the affected unit to restart and briefly interrupts service. By downloading during business hours - when transport capacity may be more available and the activation step has not yet occurred - and scheduling activation for a low-traffic maintenance window, the NOC minimizes both the duration of any service interruption and its impact on subscribers. This separation does not eliminate the need for backups, nor does activation occur automatically; it is explicitly scheduled or triggered as a distinct step.
問題 #85
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