ISC2 CC Access Controls Concepts Practice Question
An organisation implements an account lockout policy that locks an account after 5 failed login attempts within 15 minutes. This control is designed to prevent:
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
✓
Brute-force attacks
Account lockout mitigates brute-force password guessing attacks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Denial-of-service attacks
Why it's wrong here
DoS aims to disrupt services, not guess passwords.
- ✓
Brute-force attacks
Why this is correct
Lockout stops repeated guessing attempts.
- ✗
Man-in-the-middle attacks
Why it's wrong here
MITM intercepts communications, not directly related to login attempts.
- ✗
Phishing attacks
Why it's wrong here
Phishing involves tricking users, not brute forcing.
Go deeper
Related to this question
Learn chapter
Access Control Fundamentals
Key term
Policy
A policy is a set of rules or guidelines that defines how an organization manages, secures, and operates its IT systems and services.
Key term
Account lockout
Account lockout is a security feature that temporarily disables a user account after a set number of failed login attempts to prevent unauthorized access.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 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 CC exam.