This FC0-U61 practice question tests your understanding of infrastructure. 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.
A user wants to access a website but types the wrong URL. Which technology resolves domain names to IP addresses?
HTTP
Why wrong: HTTP is the protocol used for web communication.
NAT
Why wrong: NAT translates private IP addresses to public ones.
DNS
DNS resolves domain names to IP addresses.
DHCP
Why wrong: DHCP assigns IP configurations to devices.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
DNS
DNS (Domain Name System) is the technology that translates human-readable domain names (like www.example.com) into machine-readable IP addresses (like 192.0.2.1). When a user types a wrong URL, the browser still sends a DNS query to resolve the domain portion of the URL; if the domain is valid but the path is wrong, DNS resolves correctly, but if the domain itself is mistyped, DNS may fail or redirect to a different IP. This resolution is essential for locating the web server on the internet.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
HTTP
Why it's wrong here
HTTP is the protocol used for web communication.
NAT
Why it's wrong here
NAT translates private IP addresses to public ones.
DNS
Why this is correct
DNS resolves domain names to IP addresses.
Related concept
Read the scenario before looking for a memorised answer.
DHCP
Why it's wrong here
DHCP assigns IP configurations to devices.
Common exam traps
The trap here is that candidates often confuse DNS with DHCP because both involve network configuration, but DHCP assigns IP addresses dynamically while DNS resolves names to IPs; Cisco tests this distinction by pairing them as distractors.
Detailed technical explanation
DNS operates using a hierarchical distributed database, with root servers, TLD servers, and authoritative nameservers. When a user mistypes a URL, the DNS resolver may still query for the domain (e.g., 'gooogle.com' instead of 'google.com'), and if that domain exists (e.g., a typo-squatted site), it resolves to a different IP. DNS uses UDP port 53 for queries and TCP port 53 for zone transfers, and caching at various levels (browser, OS, ISP) can affect resolution speed and accuracy.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: DNS — DNS (Domain Name System) is the technology that translates human-readable domain names (like www.example.com) into machine-readable IP addresses (like 192.0.2.1). When a user types a wrong URL, the browser still sends a DNS query to resolve the domain portion of the URL; if the domain is valid but the path is wrong, DNS resolves correctly, but if the domain itself is mistyped, DNS may fail or redirect to a different IP. This resolution is essential for locating the web server on the internet.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 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-U61 exam.
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