The answer is that the default gateway is not forwarding traffic to external networks. This is correct because the user can successfully ping the local gateway at 192.168.1.1, proving that the device’s IP configuration, subnet mask, and ARP resolution are all functioning properly on the local subnet. However, the failure to ping 8.8.8.8—a public IP outside the local network—indicates that packets are not being routed beyond the subnet, which is the default gateway’s sole job. On the CompTIA ITF+ FC0-U61 exam, this scenario tests your understanding of basic routing and the gateway’s role as the exit point to external networks. A common trap is assuming the issue is with DNS or the local NIC, but since the local gateway responds, the problem is upstream. Remember the memory tip: “Local works, remote fails? Gateway’s the gate that fails.”
FC0-U61 IT Concepts and Terminology Practice Question
This FC0-U61 practice question tests your understanding of it concepts and terminology. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Refer to the exhibit. A user can ping 192.168.1.1 but cannot ping 8.8.8.8. What is most likely the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The default gateway is not forwarding traffic to external networks
The user can ping the local gateway (192.168.1.1), which confirms that the local IP configuration, subnet mask, and ARP resolution are working correctly. However, the inability to ping 8.8.8.8 (a public IP) indicates that traffic is not being routed beyond the local subnet. The most likely cause is that the default gateway is either misconfigured, down, or not performing IP forwarding to external networks, as the gateway is the router responsible for forwarding packets destined outside the local network.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 not forwarding traffic to external networks
Why this is correct
The gateway is reachable but may not have a route to the internet.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between local connectivity (Layer 2/3 within subnet) and external routing (Layer 3 beyond the gateway), and the trap here is that candidates confuse DNS resolution with IP reachability, selecting DNS even though the ping uses a raw IP address.
Detailed technical explanation
How to think about this question
When a host sends a packet to a destination outside its subnet, it checks the destination IP against its own IP and subnet mask; if the destination is not local, the host encapsulates the packet with the default gateway's MAC address (via ARP) and sends it to the gateway. The gateway then performs routing table lookups and forwards the packet toward the next hop; if the gateway lacks a default route or has a misconfigured forwarding table, the packet is dropped. In real-world scenarios, this often occurs when a router's 'ip routing' is disabled or a static default route is missing.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The default gateway is not forwarding traffic to external networks — The user can ping the local gateway (192.168.1.1), which confirms that the local IP configuration, subnet mask, and ARP resolution are working correctly. However, the inability to ping 8.8.8.8 (a public IP) indicates that traffic is not being routed beyond the local subnet. The most likely cause is that the default gateway is either misconfigured, down, or not performing IP forwarding to external networks, as the gateway is the router responsible for forwarding packets destined outside the local network.
What should I do if I get this FC0-U61 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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