mediumMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: Which security threat is indicated in the exhibit?
Exhibit
Refer to the exhibit. Security Event Log: Event ID: 4625 Logon Type: 10 (RemoteInteractive) Account Name: Administrator Source Network Address: 203.0.113.50 Failure Reason: Unknown user name or bad password.
Which security threat is indicated in the exhibit?
⚠ Common exam trap
A common mix-up: candidates confuse repeated failed logins with a malware infection or DDoS, but the key indicator is the systematic, single-source attempt pattern targeting authentication, not traffic volume or malicious code.
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
✓
Brute force attack
The exhibit shows repeated failed login attempts from a single IP address, which is characteristic of a brute force attack. This attack systematically tries many username/password combinations to gain unauthorized access, often targeting services like SSH, RDP, or web login portals.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DDoS
Why it's wrong here
DDoS floods a network with traffic, not login attempts.
- ✗
Phishing
Why it's wrong here
Phishing involves deceptive messages, not repeated logon attempts.
- ✗
Malware infection
Why it's wrong here
Malware infection would typically show signs like file changes or unusual processes.
- ✓
Brute force attack
Why this is correct
The log shows failed login attempts, characteristic of a brute force attack.
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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.