- A
DNS resolves names to IP information, while DHCP dynamically assigns addressing information to clients.
This is correct because it states the core job of each service accurately.
- B
DHCP is used primarily to translate private addresses into public addresses.
Why wrong: This is wrong because address translation is the role of NAT, not DHCP.
- C
DNS can help users reach services by hostname instead of remembering numeric IP addresses.
This is correct because one of DNS’s main benefits is usability through hostname resolution.
- D
DHCP replaces the need for subnet masks and default gateways.
Why wrong: This is wrong because DHCP does not remove the need for those settings; it usually supplies them automatically.
- E
DNS and DHCP are both Layer 1 technologies.
Why wrong: This is wrong because DNS and DHCP are application-layer services, not Layer 1 technologies.
Quick Answer
The correct answer is that DNS helps users reach services by hostname instead of remembering numeric IP addresses, while DHCP automatically supplies clients with essential IP configuration settings. DNS resolves human-friendly domain names to machine-readable IP addresses, enabling access by name rather than by memorizing numbers; DHCP dynamically assigns an IP address, subnet mask, default gateway, and often DNS server information to clients, eliminating manual configuration. On the CCNA 200-301 v2 exam, comparison questions test your ability to keep these roles distinct—a common trap is confusing DHCP with NAT or assuming it removes the need for addressing details, when in fact it provides them. Remember the mnemonic: DNS is the phonebook for names, DHCP is the landlord handing out the keys and address.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: dNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.. 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.
Which two statements accurately describe DNS and DHCP?
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
DNS resolves names to IP information, while DHCP dynamically assigns addressing information to clients.
DNS and DHCP solve very different problems, even though both are common infrastructure services. DNS helps devices and users find systems by name. In simple terms, it means people can type a hostname rather than memorizing numeric IP addresses. DHCP automatically gives clients important IP settings such as an address, subnet mask, default gateway, and often DNS server information. The trick in comparison questions is not to blend their roles together. DHCP does not perform NAT, and it does not eliminate the need for addressing details; it actually supplies them.
Key principle: DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DNS resolves names to IP information, while DHCP dynamically assigns addressing information to clients.
Why this is correct
This is correct because it states the core job of each service accurately.
Related concept
DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.
- ✗
DHCP is used primarily to translate private addresses into public addresses.
When this WOULD be correct
If the exam question asked about protocols that manage address translation in a network, specifically focusing on how private IP addresses are converted to public addresses for internet access, then this option would be correct in that context.
- ✓
DNS can help users reach services by hostname instead of remembering numeric IP addresses.
- ✗
DHCP replaces the need for subnet masks and default gateways.
Why it's wrong here
This is wrong because DHCP does not remove the need for those settings; it usually supplies them automatically.
When this WOULD be correct
In a question that asks about technologies that eliminate the need for traditional network configuration methods, such as static IP addressing, this option could be correct if it implies that DHCP automates configuration, thus reducing manual entry of subnet masks and gateways.
- ✗
DNS and DHCP are both Layer 1 technologies.
Why it's wrong here
This is wrong because DNS and DHCP are application-layer services, not Layer 1 technologies.
When this WOULD be correct
In a question that asks which technologies operate at Layer 1, if the context is expanded to include only Layer 1 devices or protocols, one might mistakenly categorize DHCP and DNS as Layer 1 technologies due to their reliance on physical network infrastructure for communication.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓DNS resolves names to IP information, while DHCP dynamically assigns addressing information to clients.Correct answer▾
Why this is correct
This is correct because it states the core job of each service accurately.
✗DHCP is used primarily to translate private addresses into public addresses.Wrong answer — click to see why▾
Why this is wrong here
DHCP is responsible for dynamically assigning IP addresses and other network configuration parameters to clients, not for translating private addresses to public addresses. Address translation is performed by Network Address Translation (NAT), typically on routers or firewalls.
★ When this WOULD be the correct answer
If the exam question asked about protocols that manage address translation in a network, specifically focusing on how private IP addresses are converted to public addresses for internet access, then this option would be correct in that context.
Why candidates choose this
Students may confuse DHCP with NAT because both involve IP address management and are often used together in networks. The term 'translate' might be loosely associated with DHCP's role in assigning addresses, leading to this misconception.
✗DHCP replaces the need for subnet masks and default gateways.Wrong answer — click to see why▾
Why this is wrong here
DHCP does not replace the need for subnet masks and default gateways; rather, it typically provides these parameters to clients automatically. Devices still require subnet masks to determine network boundaries and default gateways to reach remote networks.
★ When this WOULD be the correct answer
In a question that asks about technologies that eliminate the need for traditional network configuration methods, such as static IP addressing, this option could be correct if it implies that DHCP automates configuration, thus reducing manual entry of subnet masks and gateways.
Why candidates choose this
Because DHCP automates the assignment of these parameters, some may incorrectly think it eliminates the need for them altogether. However, the parameters are still essential for network communication; DHCP just delivers them dynamically.
✗DNS and DHCP are both Layer 1 technologies.Wrong answer — click to see why▾
Why this is wrong here
DNS and DHCP operate at the Application Layer (Layer 7) of the OSI model, not Layer 1 (Physical Layer). They use underlying transport protocols (UDP/TCP) and rely on lower layers for data transmission.
★ When this WOULD be the correct answer
In a question that asks which technologies operate at Layer 1, if the context is expanded to include only Layer 1 devices or protocols, one might mistakenly categorize DHCP and DNS as Layer 1 technologies due to their reliance on physical network infrastructure for communication.
Why candidates choose this
Students might mistakenly think that because DNS and DHCP are fundamental network services, they belong to lower layers. Additionally, the term 'Layer 1' might be confused with 'Layer 2' or 'Layer 3' due to incomplete understanding of the OSI model.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is confusing DHCP with NAT or assuming DHCP replaces the need for subnet masks and default gateways. Some candidates mistakenly believe DHCP translates private IP addresses to public ones, but this is the role of NAT, not DHCP. Additionally, DHCP does not remove the need for subnet masks or default gateways; instead, it provides these parameters automatically to clients. Misunderstanding these distinctions can lead to incorrect answers, especially when questions ask about the functions of IP services. Carefully distinguishing DHCP’s role in dynamic addressing from NAT’s role in address translation is essential to avoid this trap.
Detailed technical explanation
How to think about this question
DNS (Domain Name System) is a hierarchical and distributed naming system that translates human-friendly domain names into IP addresses, enabling users and devices to locate resources on a network without memorizing numeric IP addresses. DHCP (Dynamic Host Configuration Protocol), on the other hand, automates the assignment of IP configuration parameters such as IP address, subnet mask, default gateway, and DNS server information to client devices, simplifying network administration and ensuring consistent addressing. In Cisco networking and the CCNA context, DNS operates at the application layer and is essential for hostname resolution, allowing devices to communicate using names rather than IP addresses. DHCP dynamically leases IP addressing information to clients, reducing manual configuration errors and supporting scalable network deployments. Understanding that DNS resolves names and DHCP assigns addressing is crucial for differentiating their roles during the exam and in practical network design. A common exam trap is confusing DHCP with NAT or assuming DHCP eliminates the need for subnet masks and gateways. DHCP provides these parameters but does not perform address translation or remove the necessity of subnetting. Practically, DHCP leases are time-limited and require renewal, and DNS queries can be cached or forwarded, which affects network behavior. Recognizing these distinctions helps avoid misinterpretation and ensures accurate answers on the CCNA exam.
KKey Concepts to Remember
- DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.
- DHCP dynamically assigns IP configuration parameters such as IP address, subnet mask, default gateway, and DNS server information to client devices.
- DNS operates at the application layer and supports hostname resolution, which improves usability and network navigation.
- DHCP automates IP address management, reducing manual configuration errors and supporting scalable network environments.
- DHCP does not perform Network Address Translation (NAT); NAT is a separate function that translates private IP addresses to public IP addresses.
- DHCP provides subnet masks and default gateway information but does not eliminate the need for these addressing components in network communication.
- DNS and DHCP are distinct services that solve different network problems and should not be confused or conflated during configuration or exam scenarios.
- Understanding the specific roles of DNS and DHCP helps avoid common exam traps related to address assignment and name resolution.
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
DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.
Real-world example
How this comes up in practice
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
Questions learners often ask
What does this 200-301 question test?
Network Services and Security — This question tests Network Services and Security — DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses..
What is the correct answer to this question?
The correct answer is: DNS resolves names to IP information, while DHCP dynamically assigns addressing information to clients. — DNS and DHCP solve very different problems, even though both are common infrastructure services. DNS helps devices and users find systems by name. In simple terms, it means people can type a hostname rather than memorizing numeric IP addresses. DHCP automatically gives clients important IP settings such as an address, subnet mask, default gateway, and often DNS server information. The trick in comparison questions is not to blend their roles together. DHCP does not perform NAT, and it does not eliminate the need for addressing details; it actually supplies them.
What should I do if I get this 200-301 question wrong?
Review dNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
DNS resolves human-readable hostnames into IP addresses, enabling easier access to network resources without memorizing numeric addresses.
About these practice questions
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Same concept, more angles
1 more ways this is tested on 200-301
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which two statements accurately describe DHCP?
medium- ✓ A.It can automatically provide an IP address to a client.
- ✓ B.It can provide additional configuration such as default gateway and DNS server information.
- C.It resolves hostnames into IP addresses.
- D.It elects the designated router in OSPF.
- E.It replaces the need for subnet masks.
Why A: DHCP is used to provide IP configuration automatically to hosts. In practical terms, it can supply an IP address, subnet mask, default gateway, and often DNS server information. This reduces manual effort and helps standardize endpoint configuration across a network. The wrong answers often confuse DHCP with DNS or routing. The two correct answers are the ones focused on automatic host configuration.
Last reviewed: Apr 12, 2026
This 200-301 practice question is part of Courseiva's free Cisco 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 200-301 exam.
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