hardMultiple ChoiceObjective-mapped
FC0-U71 The most likely reason PC1 cannot ping PC2? Practice Question
Exhibit
Refer to the exhibit. Router LAN IP: 192.168.1.1/24 Switch: Unmanaged PC1: IP 192.168.1.10/24 PC2: IP 192.168.1.11/24 PC3: IP 192.168.1.12/24 All devices are connected and powered on. PC1 can ping PC3 but cannot ping PC2.
What is the most likely reason PC1 cannot ping PC2?
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
✓
A firewall on PC2 is blocking ICMP echo requests
A firewall on PC2 can be configured to block ICMP echo requests (ping) while allowing other traffic. Option A is incorrect because the default gateway is only needed for communication outside the subnet; PC1 and PC2 are on the same subnet. Option C is incorrect because if PC2's network interface were disabled, PC1 would be unable to communicate with PC2 for any service, not just ping. Option D is incorrect because a faulty switch port would cause complete loss of connectivity for PC2, not just ping failures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The default gateway is incorrect on PC1
Why it's wrong here
Default gateway is not used for same-subnet communication.
- ✓
A firewall on PC2 is blocking ICMP echo requests
Why this is correct
Firewalls often block ping by default while allowing other traffic.
- ✗
PC2's network interface is disabled
Why it's wrong here
A disabled NIC would cause complete loss of connectivity, not just ping failure.
- ✗
The switch port for PC2 is faulty
Why it's wrong here
A faulty switch port would disrupt all traffic to PC2, not just ping.
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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.