Monitoring, telemetry, logs and performance metrics

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Explain the use of monitoring and telemetry sources, including SNMP, syslog, flow data, packet captures, traps, sensors and dashboards, for visibility into network operations.
Interpret logs, alerts and event records from network devices, servers and security appliances to identify faults, performance issues and operational trends.

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Differentiate active monitoring from passive monitoring, and select the appropriate approach for availability testing, performance analysis or protocol troubleshooting.

Use baseline data, thresholds and trend analysis to determine whether observed metrics represent normal variation, degradation or a probable incident.

Explain the operational purpose of centralized logging, time synchronization and log retention in correlation, auditing and troubleshooting workflows.

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