Free CompTIA Network+ N10-009 Practice Question

Packet loss percentage is the correct answer because it provides a direct indication of network quality and efficiency, crucial for establishing a performance baseline. High packet loss can significantly affect the quality of service, making it a vital metric for alarm thresholds and troubleshooting. Network uptime, while important, is more of a reliability or availability metric, not a baseline metric used for performance anomalies. The number of active connections can vary greatly and does not necessarily indicate performance issues. CPU usage is not directly related to network performance, and device temperatures, while important for hardware monitoring, do not reflect the performance of network traffic.