Sophia, a network security analyst, is reviewing the logs from a Cisco router in an...

Within the CHFI v11 syllabus underNetwork ForensicsandLog Analysis, understandingCisco router log mnemonicsis essential for investigating network-based attacks and policy violations. Cisco devices generate structured log messages that include afacility,severity level, andmnemonic, which together describe the event detected by the device.

The mnemonic%SEC-6-IPACCESSLOGPspecifically indicates that apacket (TCP or UDP)matched anIP Access Control List (ACL)rule and was logged accordingly. The “SEC” facility denotes a security-related event, the severity level “6” represents an informational message, and “IPACCESSLOGP” confirms that the log entry was generated due to an ACL permit or deny rule matching a packet. This type of log is commonly used in forensic investigations to trace suspicious traffic, identify unauthorized access attempts, and correlate firewall or router behavior with other network logs.

Option B (IPACCESSLOGRL) refers to rate-limited ACL logging, not standard packet logging. Option A is specific to IPv6 ACL logging and does not apply unless IPv6 traffic is explicitly involved. Option D (TOOMANY) relates to excessive event conditions and is not tied to ACL packet matching.

The CHFI v11 Exam Blueprint highlightsanalyzing Cisco router and firewall logs, including ACL-based messages, as a key skill for detecting network attacks and reconstructing intrusion timelines. Therefore,%SEC-6-IPACCESSLOGPis the correct and exam-aligned answer