hardMultiple Choice
ISC2 CC Practice Question: Refer to the exhibit
Exhibit
Event ID 4625: An account failed to log on. Subject: Security ID: NULL_SID, Account Name: - , Account Domain: -; Logon Type: 3; Account For Which Logon Failed: Security ID: NULL SID, Account Name: administrator; Failure Reason: Unknown user name or bad password; Workstation Name: PC123; Source Network Address: 10.0.0.99;
Refer to the exhibit. What type of event is this?
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
✓
Failed network login
The event shows a failed network logon (Logon Type 3) with a failure status code. Option A is incorrect because an account lockout event would have a different event ID (e.g., 4740), not a Logon Type 3 failure. Option B is incorrect because the event indicates a failure (e.g., status 0xC000006D), not a successful login. Option D is incorrect because Logon Type 3 indicates a network logon, whereas a local logon would be Type 2 or 10.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Account lockout
Why it's wrong here
Account lockout requires the log to record the account being locked after repeated failed attempts, which the exhibit does not show. It tempts because lockouts are a common security event, and it would be correct if the entry named the locked account and the lockout source.
- ✗
Successful remote login
Why it's wrong here
A successful remote login requires the log to show a network logon type with successful authentication, but the exhibit records a different event category. It tempts because remote access events are frequently examined during investigations, and it would be correct if the entry showed logon type 3 or 10 with success.
- ✓
Failed network login
Why this is correct
A failed network login event records an authentication attempt rejected by a system, such as a domain controller or VPN gateway, typically showing a logon failure reason code. This matches the exhibit's event type rather than a successful logon, account change or process execution.
- ✗
Failed local login
Why it's wrong here
A failed local login requires an authentication attempt against the local machine's credential store, whereas the exhibit shows a network-based authentication event. It tempts because failed logons are a common audited event, and it would be correct if the log recorded an interactive logon failure on the host itself.
Go deeper
Related to this question
Learn chapter
Secure Network Architecture and Design
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.
Key term
Event
An event is any identifiable occurrence or action in a computer system, network, or application that can be logged, monitored, or analyzed for security or operational purposes.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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