Match each security tool to its purpose.
Drag a concept onto its matching description — or click a concept then click the description.
Protects web applications from attacks
Detects intrusions and alerts
Detects and blocks intrusions in real-time
Host-based intrusion detection system
Network-based intrusion detection system
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SIEM: Centralized log management and real-time event correlation
Correct matches: SIEM provides centralized log analysis, IDS monitors for malicious activity, and firewalls enforce traffic rules. Common confusions include mixing SIEM and firewall functions.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
SIEM: Centralized log management and real-time event correlation
Why this is correct
SIEM (Security Information and Event Management) aggregates logs and correlates events for analysis.
IDS: Monitors network or host activity for malicious actions and generates alerts
Why this is correct
Intrusion Detection Systems (IDS) passively monitor traffic for suspicious patterns.
Firewall: Enforces access control by filtering traffic based on rules
Why this is correct
Firewalls permit or deny traffic based on source, destination, and port rules.
SIEM: Blocks malicious traffic by inspecting packet headers
Why it's wrong here
This describes a firewall, not SIEM. SIEM is for analysis, not inline blocking.
IDS: Scans systems for known vulnerabilities
Why it's wrong here
This describes a vulnerability scanner. IDS focuses on real-time monitoring.
Firewall: Collects logs from multiple sources for analysis
Why it's wrong here
This describes SIEM. Firewalls generate logs but do not aggregate from other sources.
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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 →
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.