easyMultiple Choice
FC0-U71 Practice Question: Refer to the exhibit
Exhibit
C:\> ipconfig Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.1.10 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : (blank)
Refer to the exhibit. A user cannot access the internet. What is the most likely issue based on the configuration shown?
⚠ Common exam trap
CompTIA often tests the misconception that a missing DNS server prevents internet access entirely, but the real issue is the lack of a default gateway for routing traffic beyond the local subnet.
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
✓
The default gateway is missing
The exhibit shows an IP address of 192.168.1.10 with a subnet mask of 255.255.255.0, but no default gateway is configured. Without a default gateway, the device can communicate within its local subnet (192.168.1.0/24) but cannot route traffic to any external network, including the internet. The default gateway is the router's IP address that provides the next-hop path for all off-subnet traffic.
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 missing
Why this is correct
A missing default gateway leaves the host with no route to off-subnet destinations, so all internet-bound traffic is dropped despite valid IP address and subnet mask. The exhibit shows no gateway configured, directly explaining the total loss of external connectivity while local subnet communication still functions.
- ✗
The DNS server is not configured
Why it's wrong here
A missing DNS server would prevent name resolution, yet the exhibit already lists a DNS address, so this is not the fault. DNS configuration is the correct focus when pings to IP addresses succeed but hostnames fail to resolve.
- ✗
The IP address is invalid
Why it's wrong here
The address shown is a valid, properly formed host address within its subnet, so it is not invalid. An invalid address would be malformed, out of range, or a network or broadcast value; that scenario arises when static configuration is mistyped.
- ✗
The subnet mask is incorrect
Why it's wrong here
An incorrect subnet mask would misplace the host within its network, but the exhibit shows the address and mask consistent with the gateway, so local routing still functions. Mask errors typically manifest as reachability failures to specific subnets, not total internet loss.
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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.