ISC Practice Question: Systems Security Implementation Verification And Validation
During a system accreditation process, you need to verify that logs are being sent to a centralized SIEM. Which method provides the most reliable verification of log integrity?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verify the use of mutual TLS (mTLS) and log hashing/signing in the syslog configuration.
Log integrity is verified by ensuring the logs are digitally signed or protected from tampering during transit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify the use of mutual TLS (mTLS) and log hashing/signing in the syslog configuration.
Why this is correct
mTLS ensures encrypted transport, and hashing/signing ensures integrity and authenticity.
- ✗
Verify that the SIEM administrative account has read-only permissions.
Why it's wrong here
This pertains to SIEM access control, not the integrity of the incoming log stream.
- ✗
Review the firewall logs to see if port 514 is open.
Why it's wrong here
Port 514 is for standard syslog, which is insecure and lacks integrity checks.
- ✗
Check if the SIEM has received a sample log entry via 'tail -f'.
Why it's wrong here
This verifies connectivity, not integrity or non-repudiation.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.