easyMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: A help desk technician receives an alert from the…
Exhibit
Refer to the exhibit. ``` Event ID: 4625 Time: 2023-08-15 14:23:45 Account Name: jsmith Failure Reason: Unknown user name or bad password. Workstation Name: WORKSTATION-05 Logon Type: 10 (RemoteInteractive) ```
A help desk technician receives an alert from the security monitoring system showing multiple events like the one in the exhibit. The technician is investigating a possible brute-force attack. Based on the exhibit, which of the following is the primary attack vector being used?
⚠ Common exam trap
CompTIA often tests the association of default port numbers with specific protocols, so the trap here is confusing RDP (port 3389) with SSH (port 22) or VPN (various ports), leading candidates to pick a plausible but incorrect attack vector.
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
✓
RDP brute-force attack
The exhibit shows repeated failed authentication attempts targeting TCP port 3389, which is the default port for Remote Desktop Protocol (RDP). A brute-force attack on RDP involves systematically trying many username/password combinations to gain unauthorized remote access to a Windows system. This matches the definition of an RDP brute-force attack.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VPN brute-force attack
Why it's wrong here
VPN logon events have different logon types (e.g., 3 for network) and are not shown here.
- ✓
RDP brute-force attack
Why this is correct
Logon Type 10 indicates a remote interactive logon, commonly used by RDP.
- ✗
SSH brute-force attack
Why it's wrong here
SSH uses Logon Type 2 or 10 but typically on port 22; RDP is more common for Windows systems.
- ✗
Web application attack
Why it's wrong here
Web application attacks are typically seen in HTTP logs, not Windows security event logs.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 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 FC0-U71 exam.