Nokia Certified Data Center Fabric Professional 4A0-D01 Question # 9 Topic 1 Discussion

Comprehensive and Detailed Explanation with Exact Extracts:

Option A (Valid): Log sources can be defined using Linux syslog facilities (e.g., local6) and priorities.

Extract from Nokia SR Linux Configuration Guide:

"Log sources are identified using Linux facilities (e.g., kernel, local6) and priorities (e.g., info, error)."

Option B (Valid): The console is a valid source for log messages (e.g., kernel boot logs).

Extract from Nokia SR Linux Fundamentals Guide:

"Console output is treated as a log source, particularly for kernel and early-boot messages captured before system services initialize."

Option C (Valid): SR Linux subsystems (e.g., bgp, system) generate logs with specific priorities.

Extract from Nokia SR Linux Configuration Guide (Section: Log Filters):

"Logs generated by SR Linux subsystems (e.g., network-instance, interface) can be filtered by subsystem name and priority."

Option D (Invalid): "Syslog filter" is not a source—it is a configuration mechanism.

Extract from Nokia SR Linux System Management Guide:

"Filters (/system logging filter) are applied to log sources (facilities/subsystems) to select messages for destinations. Filters themselves do not generate logs."