Quick Answer
The answer is DNS server logs, Windows Event Logs, and syslog messages from network devices. These three sources are foundational for security monitoring because they capture distinct layers of activity: DNS logs reveal malicious domain lookups and command-and-control traffic, Windows Event Logs record critical host-level events like logon attempts (Event ID 4625) and process creation (Event ID 4688), and syslog from routers or firewalls provides network flow data and access violations. On the Cisco CyberOps Associate 200-201 exam, this question tests your understanding of where security-relevant data originates, often appearing as a multi-select item where a common trap is choosing application logs or NetFlow alone—NetFlow is flow data, not a log source. A strong memory tip is to think "host, network, and service": Windows logs cover the host, syslog covers network devices, and DNS logs cover a critical service layer. This triad ensures visibility across the kill chain, from initial access to exfiltration.
This 200-201 practice question tests your understanding of security monitoring. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which THREE are typical sources of log data used in security monitoring? (Choose three.)
Printer spool logs.
Why wrong: Not security-relevant.
HVAC system logs.
Why wrong: Operational, not security.
Windows Event Logs.
Contain authentication and system events.
Firewall logs.
Network traffic logs.
DNS server logs.
Reveal domain queries.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Windows Event Logs.
Windows Event Logs are a primary source of security monitoring data because they record critical security events such as logon attempts, account changes, and process creation (Event IDs 4624, 4625, 4688). Security Information and Event Management (SIEM) systems ingest these logs to detect unauthorized access, privilege escalation, and malware execution.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Printer spool logs.
Why it's wrong here
Not security-relevant.
HVAC system logs.
Why it's wrong here
Operational, not security.
Windows Event Logs.
Why this is correct
Contain authentication and system events.
Related concept
Read the scenario before looking for a memorised answer.
Firewall logs.
Why this is correct
Network traffic logs.
Related concept
Read the scenario before looking for a memorised answer.
DNS server logs.
Why this is correct
Reveal domain queries.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the distinction between logs that are security-relevant versus operational or environmental logs, so candidates mistakenly choose printer or HVAC logs because they are 'logs' in a general sense, but they lack the authentication, network, or system event data required for security monitoring.
Detailed technical explanation
Windows Event Logs use the Windows Event Logging service (wevtsvc) and store events in .evtx files, with security logs requiring the 'Security' log channel. SIEM tools like Splunk or ELK parse these logs via WinEventLog inputs, and analysts often filter for specific Event IDs (e.g., 4624 for successful logon, 4648 for explicit credential use) to investigate lateral movement or brute-force attacks. In real-world incidents, correlating Windows Event Logs with firewall logs can reveal the full attack chain from initial access to privilege escalation.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
Security Monitoring — This question tests Security Monitoring — Read the scenario before looking for a memorised answer..
The correct answer is: Windows Event Logs. — Windows Event Logs are a primary source of security monitoring data because they record critical security events such as logon attempts, account changes, and process creation (Event IDs 4624, 4625, 4688). Security Information and Event Management (SIEM) systems ingest these logs to detect unauthorized access, privilege escalation, and malware execution.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.
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