CAS-004 Security Operations Practice Question
A security analyst receives an alert from the SIEM indicating multiple failed logon attempts from an external IP address followed by a successful logon for a domain admin account. Which phase of the incident response lifecycle is the analyst currently in?
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
✓
Detection
The detection phase involves identifying potential incidents through alerts and analysis. The analyst has received an alert and is likely investigating, which is part of detection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Lessons learned
Why it's wrong here
Lessons learned occurs after the incident is resolved.
- ✗
Containment
Why it's wrong here
Containment involves stopping the incident from spreading.
- ✓
Detection
Why this is correct
The alert is part of the detection phase where potential incidents are identified.
- ✗
Preparation
Why it's wrong here
Preparation occurs before an incident to build capabilities.
Go deeper
Related to this question
About these practice questions
Courseiva writes every CAS-005 question from scratch — 968 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.