The answer is using a private DNS server, which is the correct security best practice because it allows an organization to control DNS resolution internally, preventing external interception or manipulation of DNS queries. By keeping DNS lookups within a trusted network, this practice directly protects against DNS spoofing and ensures that internal resources are resolved using local, authoritative records rather than relying on potentially compromised public DNS servers. On the CompTIA ITF+ FC0-U61 exam, this concept tests your understanding of network security fundamentals, often appearing in questions about mitigating man-in-the-middle attacks or unauthorized redirection. A common trap is confusing a private DNS server with a public one like Google’s 8.8.8.8, which offers no internal control; remember that private means local ownership and filtering. Memory tip: think “Private DNS = Private Defense” — if you control the lookup, you control the security.
FC0-U61 Security Practice Question
This FC0-U61 practice question tests your understanding of security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Exhibit
Refer to the exhibit.
C:\> nslookup example.com
Server: dns.company.com
Address: 192.168.1.1
Non-authoritative answer:
Name: example.com
Address: 93.184.216.34
Which security best practice is being demonstrated?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using a private DNS server
Using a private DNS server enhances security by allowing an organization to control DNS resolution internally, preventing external interception or manipulation of DNS queries. This practice helps protect against DNS spoofing and ensures that internal resources are resolved using trusted, local records rather than relying on potentially compromised public DNS servers.
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.
✗
Using a public DNS server
Why it's wrong here
Public DNS servers (e.g., 8.8.8.8) offer less control and may log queries.
✗
Using a static IP address
Why it's wrong here
Static IP is not directly related to DNS security.
✓
Using a private DNS server
Why this is correct
A private DNS server provides internal resolution and can enforce security policies.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using a dynamic IP address
Why it's wrong here
Dynamic IP is common for clients, not a security practice.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'private DNS server' with 'static IP address' or 'dynamic IP address,' mistakenly thinking that IP address assignment methods are security controls, when in fact DNS server choice directly impacts query confidentiality and integrity.
Detailed technical explanation
How to think about this question
A private DNS server typically runs on an internal network and can be configured with split-horizon DNS, providing different responses for internal vs. external queries. This setup allows internal hosts to resolve private IP addresses (e.g., 10.x.x.x) for internal services, while external queries are forwarded to public resolvers. In a real-world scenario, a compromised public DNS server could return a malicious IP for a legitimate domain, but a private DNS server with DNSSEC validation can cryptographically verify responses, mitigating such attacks.
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 practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Using a private DNS server — Using a private DNS server enhances security by allowing an organization to control DNS resolution internally, preventing external interception or manipulation of DNS queries. This practice helps protect against DNS spoofing and ensures that internal resources are resolved using trusted, local records rather than relying on potentially compromised public DNS servers.
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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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