- A
DNS: Resolves domain names to IP addresses
DNS (Domain Name System) translates human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access resources by name rather than numeric addresses.
- B
DNS: Assigns IP addresses to hosts dynamically
Why wrong: This is incorrect because DHCP (Dynamic Host Configuration Protocol) is the service that dynamically assigns IP addresses to hosts, not DNS.
- C
DNS: Synchronizes time across network devices
Why wrong: This is incorrect because NTP (Network Time Protocol) is the service that synchronizes time across network devices, not DNS.
- D
DNS: Monitors network device health and performance
Why wrong: This is incorrect because SNMP (Simple Network Management Protocol) is the service used to monitor network device health and performance, not DNS.
Quick Answer
The answer is DNS resolves domain names to IP addresses, while DHCP assigns IP addresses, NTP synchronizes time, SNMP monitors devices, Syslog centralizes logs, and NetFlow analyzes traffic. This mapping is correct because each network services function directly addresses a specific operational problem: name resolution, automatic addressing, time accuracy, device health monitoring, log aggregation, and traffic flow analysis. On the CCNA 200-301 v2 exam, you will often see this as a drag-and-drop or matching question testing your ability to pair each service with its primary purpose—a common trap is confusing SNMP with Syslog, since both involve monitoring, but SNMP polls for device status while Syslog passively receives event messages. To lock this in, use the mnemonic “DNS Does Names, DHCP Hands IPs, NTP Ticks Time, SNMP Checks, Syslog Collects, NetFlow Tracks.”
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: dNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.. 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.
Match each infrastructure service to the operational problem it most directly addresses.
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 domain names to IP addresses
DNS resolves names; DHCP assigns IPs; NTP syncs time; SNMP monitors devices; Syslog centralizes logs; NetFlow analyzes traffic.
Key principle: DNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.
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 domain names to IP addresses
Why this is correct
DNS (Domain Name System) translates human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access resources by name rather than numeric addresses.
Related concept
DNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.
- ✗
DNS: Assigns IP addresses to hosts dynamically
- ✗
DNS: Synchronizes time across network devices
- ✗
DNS: Monitors network device health and performance
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 domain names to IP addressesCorrect answer▾
Why this is correct
DNS (Domain Name System) translates human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access resources by name rather than numeric addresses.
✗DNS: Assigns IP addresses to hosts dynamicallyWrong answer — click to see why▾
Why this is wrong here
The specific factual error: DNS does not assign IP addresses; it resolves names to IPs. DHCP handles dynamic IP assignment.
Why candidates choose this
Candidates pick this because they confuse the 'naming' function of DNS with the 'addressing' function of DHCP, especially since both involve IP addresses.
✗DNS: Synchronizes time across network devicesWrong answer — click to see why▾
Why this is wrong here
The specific factual error: DNS does not provide time synchronization; NTP does.
Why candidates choose this
Candidates pick this because they may think DNS is involved in time-related functions due to its role in resolving time server names, but actual time sync is done by NTP.
✗DNS: Monitors network device health and performanceWrong answer — click to see why▾
Why this is wrong here
The specific factual error: DNS does not monitor devices; SNMP collects and organizes management information from network devices.
Why candidates choose this
Candidates pick this because they associate DNS with network infrastructure and may think it has monitoring capabilities, but monitoring is handled by SNMP.
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
The trap is confusing the roles of DNS and DHCP. Both involve IP addresses, but DNS resolves names, while DHCP assigns addresses. Also, avoid associating DNS with time sync (NTP) or monitoring (SNMP).
Detailed technical explanation
How to think about this question
Infrastructure services like DNS, DHCP, NTP, and Syslog form the backbone of network operations by addressing specific functional needs. DNS translates domain names into IP addresses, allowing users and devices to access resources using familiar names instead of numeric IPs. DHCP automates the distribution of IP addresses and other network configuration parameters, reducing manual errors and simplifying client onboarding. NTP ensures all devices maintain synchronized clocks, which is vital for accurate logging and time-sensitive protocols. Syslog collects and centralizes logs from network devices, enabling administrators to monitor network health and diagnose issues efficiently. When troubleshooting, it is essential to map observed symptoms to the correct infrastructure service. For example, if clients cannot obtain IP addresses automatically, the problem likely lies with DHCP. If devices cannot resolve hostnames, DNS is the service to check. Time discrepancies across devices point to NTP issues, while missing or incomplete event logs indicate Syslog problems. Cisco devices rely on these services to maintain network reliability and operational clarity, so understanding their distinct roles helps streamline fault isolation and remediation. A common exam trap is confusing the symptoms associated with these services. For instance, assuming a DNS problem when clients fail to get IP addresses leads to wasted effort checking name resolution instead of DHCP. Similarly, overlooking NTP issues when timestamps are inconsistent can cause misinterpretation of logs. In practical networks, these services often interrelate, but each addresses a unique operational problem. Recognizing their specific symptoms and functions is critical for effective CCNA-level troubleshooting and exam success.
KKey Concepts to Remember
- DNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.
- DHCP automates IP address assignment to clients, preventing manual configuration errors and ensuring devices receive valid network parameters.
- NTP synchronizes device clocks across the network, which is critical for accurate timestamps in logs and coordinated network operations.
- Syslog centralizes event logging from multiple devices, allowing network administrators to monitor, troubleshoot, and audit network activity efficiently.
- Infrastructure services directly address specific operational problems: DNS fixes name resolution issues, DHCP resolves IP assignment failures, NTP corrects time discrepancies, and Syslog manages event collection.
- Troubleshooting network issues requires linking symptoms to the correct infrastructure service, such as associating failure to obtain an IP address with DHCP problems.
- Cisco devices use these infrastructure services to maintain network stability and operational visibility, making understanding their roles essential for CCNA-level troubleshooting.
- Misidentifying the service related to a symptom can delay problem resolution and lead to ineffective troubleshooting steps.
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 domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-301 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. DNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP. 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.
Review dNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP., then practise related 200-301 questions on the same topic to reinforce the concept.
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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 domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP..
What is the correct answer to this question?
The correct answer is: DNS: Resolves domain names to IP addresses — DNS resolves names; DHCP assigns IPs; NTP syncs time; SNMP monitors devices; Syslog centralizes logs; NetFlow analyzes traffic.
What should I do if I get this 200-301 question wrong?
Review dNS resolves human-readable domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP., 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 domain names into IP addresses, enabling devices to locate network resources by name rather than numeric IP.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
5 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. Match each service to the kind of problem it most directly helps solve.
medium- ✓ A.DNS - remembering IP addresses; DHCP - manual IP configuration; FTP - file transfers; SSH - encrypted remote access; RADIUS - network access; TACACS+ - device administration
- B.DNS - file transfers; DHCP - encrypted remote access; FTP - remembering IP addresses; SSH - manual IP configuration; RADIUS - device administration; TACACS+ - network access
- C.DNS - encrypted remote access; DHCP - file transfers; FTP - manual IP configuration; SSH - remembering IP addresses; RADIUS - device administration; TACACS+ - network access
- D.DNS - manual IP configuration; DHCP - remembering IP addresses; FTP - encrypted remote access; SSH - file transfers; RADIUS - network access; TACACS+ - device administration
Why A: DNS solves the problem of remembering IP addresses. DHCP eliminates manual IP configuration. FTP enables file transfers. SSH provides encrypted remote access. RADIUS and TACACS+ are AAA protocols, with RADIUS commonly used for network access and TACACS+ for device administration.
Variation 2. Match each service or protocol to the problem it most directly helps solve.
medium- ✓ A.DNS: Resolves hostnames to IP addresses
- ✓ B.DHCP: Automatically assigns IP addresses to devices
- ✓ C.NTP: Synchronizes clocks across network devices
- ✓ D.SNMP: Monitors and manages network devices
Why A: Each service or protocol directly addresses a specific networking problem as described.
Variation 3. Match each service to the problem it most directly helps solve.
medium- ✓ A.DHCP: Automatically assigns IP addresses to devices, solving manual configuration.
- ✓ B.DNS: Resolves domain names to IP addresses, solving the need to remember numeric addresses.
- ✓ C.NAT: Allows multiple private IPs to share a single public IP, solving IPv4 address shortage.
- ✓ D.VPN: Securely connects remote networks over the internet, solving insecure public connections.
Why A: DNS resolves hostnames to IP addresses, so without it users can reach servers by IP but not by hostname. DHCP automatically assigns IP addresses, so without it hosts do not receive addressing automatically. NTP synchronizes clocks across devices, so without it logs from different devices show inconsistent time stamps. Syslog forwards event messages to a central server, solving the need for centralized event logging.
Variation 4. Match each operational tool to the kind of question it most directly helps answer.
medium- ✓ A.Azure Monitor: What is the current CPU utilization of my VM?
- ✓ B.Log Analytics: Why did my application fail at 3 AM?
- ✓ C.Application Insights: How are users interacting with my web app?
- ✓ D.Azure Advisor: How can I improve the cost and performance of my resources?
Why A: Syslog collects and stores log messages from network devices, directly answering 'What events or messages occurred?' SNMP queries device MIBs for counters and status values, answering 'What are the counters or current status values?' NetFlow provides traffic flow records showing source/destination pairs, protocols, and bandwidth usage, answering 'Which conversations are using the bandwidth?' NTP synchronizes clocks across devices, answering 'Are device clocks aligned for accurate timelines?' The tools are standard network management protocols, not specific to any cloud platform.
Variation 5. Why does DNS make networks easier for people to use?
medium- ✓ A.It lets people use memorable names instead of raw IP addresses.
- B.It assigns IP addresses automatically.
- C.It replaces the need for default gateways.
- D.It elects the root bridge for STP.
Why A: DNS makes networks easier to use because it lets people work with names instead of memorizing numeric IP addresses. In practical terms, users can remember a server name much more easily than a string of numbers. DNS creates that naming layer while the network still uses IP underneath. This usability benefit is one of the main reasons DNS is so important in everyday network operations.
Last reviewed: May 17, 2026
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