hardMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. Device: Router Interface: GigabitEthernet0/0 IP Address: 10.0.0.1 Subnet Mask: 255.255.255.0 Status: Administratively down Interface: GigabitEthernet0/1 IP Address: 192.168.1.1 Subnet Mask: 255.255.255.0 Status: up/up
Refer to the exhibit. A technician is troubleshooting connectivity from a PC connected to the 192.168.1.0/24 network. The PC cannot reach the 10.0.0.0/24 network. What is the most likely cause?
⚠ Common exam trap
CompTIA often tests the concept that a disabled interface on the local subnet is the most fundamental cause of connectivity failure, tricking candidates into focusing on routing or cabling issues on the remote side instead of verifying the local interface status first.
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
✓
GigabitEthernet0/0 is disabled
The PC on 192.168.1.0/24 cannot reach 10.0.0.0/24 because GigabitEthernet0/0 is disabled, which is the interface that provides the default gateway or the path to the router. Without an active interface on the local subnet, the PC cannot send any frames to the router, and no traffic can leave the local network. Even if routes exist, a disabled interface prevents all Layer 1 and Layer 2 communication, making connectivity impossible.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Incorrect subnet mask on the PC
Why it's wrong here
The exhibit shows router interfaces, not PC.
- ✗
Missing route to 10.0.0.0/24
Why it's wrong here
The interface being down would prevent connectivity regardless of routing.
- ✗
Faulty cable on GigabitEthernet0/1
Why it's wrong here
That interface is up/up.
- ✓
GigabitEthernet0/0 is disabled
Why this is correct
The interface is administratively down.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every FC0-U71 question from scratch — 988 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.