Networking
Intermediate
What is Network Monitoring?
The practice of continuously observing network infrastructure to detect failures, performance degradation, and security threats.
Network monitoring tracks bandwidth utilization, packet loss, latency, device health, and security events across network infrastructure. Tools include Nagios, Zabbix, PRTG, and LibreNMS for infrastructure monitoring; Wireshark and tcpdump for packet analysis; NetFlow/sFlow for traffic analysis; and SNMP for device metrics. Modern monitoring systems use agents or agentless collection, define thresholds for alerts, generate performance reports, and support auto-remediation. Effective monitoring covers availability (is it up?), performance (is it fast?), and security (is it safe?) across all network layers.
