ISC Practice Question: Systems Security Implementation Verification And Validation
A security professional is verifying the implementation of MFA on an administrative account. What is the most reliable way to confirm the MFA configuration is working correctly?
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
✓
Attempt to log in with valid credentials and verify that the system prompts for the secondary token.
Successful authentication with a second factor is the ultimate proof of correct implementation.
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 that the account has a 'mobile' field populated.
Why it's wrong here
A phone number does not mean MFA is actually enforced or working.
- ✓
Attempt to log in with valid credentials and verify that the system prompts for the secondary token.
Why this is correct
Real-world testing of the authentication flow is the definitive method to verify MFA.
- ✗
Review the MFA server logs for daily activity.
Why it's wrong here
Logs show history, not the current state of enforcement.
- ✗
Check the user account settings in the Active Directory console.
Why it's wrong here
The setting might be configured, but that does not guarantee the system is effectively enforcing it.
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.