Definition
Traffic analysis involves examining network traffic patterns to understand data flow, identify anomalies, and assess security posture. This process typically involves capturing, inspecting, and analyzing packet data, flow records, or logs to discern communication types, sources, destinations, and volumes. Understanding traffic patterns is crucial for optimizing network performance, detecting malicious activity, and ensuring compliance with security policies. For instance, a security analyst might use traffic analysis to spot an unusual surge in outbound data from a server, indicating a potential data exfiltration attempt. Unlike simple network monitoring which focuses on availability, traffic analysis delves into the content and behavior of the data itself. This concept is frequently covered in cybersecurity certifications like CompTIA Security+ and CySA+.