An investigator has been assigned to analyze extensive network logs following a suspected data breach...

Option A. Security Onion is the best answer because the question requires a solution for collecting and managing logs from multiple devices , supporting real-time alerting , enabling metadata analysis , and helping investigators correlate events across the environment. CHFI v11 explicitly includes centralized logging using SIEM solutions , SIEM solutions , types of event correlation , event correlation approaches , and incident detection and examination with SIEM tools .

Security Onion fits that need because it is built around enterprise-scale monitoring, alerting, and network visibility. It is far more suitable than the other options for incident-centric log aggregation and correlation. OSFClone is a bootable acquisition utility, not a log-correlation platform. Intella Pro is oriented toward eDiscovery and evidence review rather than network event monitoring. Tableau is commonly associated with write-blocking hardware, not SIEM-style network analysis.

Because the task is to organize logs, examine anomalous traffic patterns, and correlate network events to understand the attack timeline and scope, the most CHFI-aligned choice is Security Onion . It best matches the blueprint’s network-forensics and SIEM-focused objectives.