- A
DNS: Translates domain names to IP addresses
DNS (Domain Name System) resolves human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access websites without memorizing numeric addresses.
- B
DNS: Assigns IP addresses dynamically to devices on a network
Why wrong: This is incorrect because assigning IP addresses dynamically is the function of DHCP (Dynamic Host Configuration Protocol), not DNS.
- C
DNS: Synchronizes time across network devices
Why wrong: This is incorrect because time synchronization is the function of NTP (Network Time Protocol), not DNS.
- D
DNS: Manages and monitors network devices
Why wrong: This is incorrect because network management and monitoring are functions of SNMP (Simple Network Management Protocol), not DNS.
Quick Answer
The correct answer is DNS, which translates domain names to IP addresses, because this service acts as the internet’s phonebook by resolving human-readable URLs into the numerical IP addresses that network devices use to communicate. Without DNS, users would need to memorize long strings of numbers to access websites or services, making it a foundational layer of network connectivity. On the CCNA 200-301 v2 exam, DNS resolution is frequently tested in the context of network fundamentals and troubleshooting, often appearing in questions that ask you to match services to functions or to identify why a name fails to resolve. A common trap is confusing DNS with DHCP, but remember that DHCP assigns addresses dynamically, while DNS resolves names—think of it as “DNS does the naming, DHCP does the claiming.” For a quick memory tip, recall the mnemonic “DNS Decodes Names to Servers,” reinforcing that its primary role is translation, not assignment.
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 to enable network resource access.. 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 network service to its primary function.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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: Translates domain names to IP addresses
Each network service has a distinct primary function: DNS translates names to IPs, DHCP automates IP assignment, NTP synchronizes time, SNMP manages devices, FTP transfers files, and HTTP serves web content.
Key principle: DNS resolves human-readable domain names into IP addresses to enable network resource access.
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: Translates domain names to IP addresses
Why this is correct
DNS (Domain Name System) resolves human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access websites without memorizing numeric addresses.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
DNS resolves human-readable domain names into IP addresses to enable network resource access.
- ✗
DNS: Assigns IP addresses dynamically to devices on a network
- ✗
DNS: Synchronizes time across network devices
- ✗
DNS: Manages and monitors network devices
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: Translates domain names to IP addressesCorrect answer▾
Why this is correct
DNS (Domain Name System) resolves human-readable domain names (e.g., www.example.com) into IP addresses, enabling users to access websites without memorizing numeric addresses.
✗DNS: Assigns IP addresses dynamically to devices on a networkWrong answer — click to see why▾
Why this is wrong here
The specific factual error: Confusing DNS with DHCP; DNS resolves names, DHCP assigns IPs.
Why candidates choose this
Candidates pick this because both DNS and DHCP are network services that involve IP addresses, leading to confusion about their roles.
✗DNS: Synchronizes time across network devicesWrong answer — click to see why▾
Why this is wrong here
The specific factual error: Attributing time synchronization to DNS instead of NTP.
Why candidates choose this
Candidates pick this because they may associate DNS with network infrastructure services but misremember its specific function.
✗DNS: Manages and monitors network devicesWrong answer — click to see why▾
Why this is wrong here
The specific factual error: Assigning management/monitoring duties to DNS instead of SNMP.
Why candidates choose this
Candidates pick this because DNS is a critical network service, and they may think it includes management capabilities.
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 common trap is confusing DNS with DHCP because both involve IP addresses. Remember: DNS resolves names to IPs, while DHCP assigns IPs. Also, avoid mixing up DNS with other services like NTP or SNMP.
Detailed technical explanation
How to think about this question
Network services like DNS, DHCP, NTP, and Syslog are foundational to IP services in Cisco networks. DNS operates by resolving domain names into IP addresses, allowing users and devices to access resources without memorizing numeric IPs. DHCP dynamically assigns IP addresses and essential network parameters such as subnet mask, default gateway, and DNS servers, which reduces manual configuration errors and supports scalable network design. NTP maintains accurate time synchronization across all network devices, which is vital for timestamping logs, coordinating scheduled tasks, and supporting security protocols that rely on time-based authentication. Syslog collects event messages from routers, switches, and other devices, centralizing logs for analysis, fault detection, and compliance auditing. Cisco devices can be configured to send Syslog messages to a centralized server for efficient monitoring. A common exam trap is confusing the functions of these services, such as assuming DHCP resolves names like DNS or that NTP assigns IP addresses. In practical Cisco environments, misconfiguring these services can lead to connectivity issues, inaccurate logs, or time discrepancies that complicate troubleshooting. Understanding each service’s role ensures proper network design and effective problem resolution.
KKey Concepts to Remember
- DNS resolves human-readable domain names into IP addresses to enable network resource access.
- DHCP dynamically assigns IP addresses and network parameters to hosts, reducing manual configuration.
- NTP synchronizes device clocks across the network to ensure accurate timestamps and coordinated operations.
- Syslog collects and centralizes event messages from network devices for monitoring and troubleshooting.
- Each IP service has a distinct role that supports network functionality and management in Cisco environments.
- Misunderstanding the functions of DNS, DHCP, NTP, and Syslog is a common source of exam errors.
- Proper configuration of these services is essential for network reliability, security, and efficient troubleshooting.
- Cisco devices use these IP services to automate and streamline network operations and event management.
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 to enable network resource access.
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 to enable network resource access. 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 to enable network resource access., then practise related 200-301 questions on the same topic to reinforce the concept.
- →
Network Services and Security — study guide chapter
Learn the concepts, then practise the questions
- →
Network Services and Security practice questions
Targeted practice on this topic area only
- →
All 200-301 questions
1,819 questions across all exam domains
- →
CCNA 200-301 v2 study guide
Full concept coverage aligned to exam objectives
- →
200-301 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Infrastructure and Connectivity practice questions
Practise 200-301 questions linked to Network Infrastructure and Connectivity.
Switching and Network Access practice questions
Practise 200-301 questions linked to Switching and Network Access.
IP Routing practice questions
Practise 200-301 questions linked to IP Routing.
Network Services and Security practice questions
Practise 200-301 questions linked to Network Services and Security.
AI and Network Operations practice questions
Practise 200-301 questions linked to AI and Network Operations.
CCNA subnetting practice questions
Practise IPv4 subnetting, CIDR, masks, host ranges and subnet selection.
CCNA OSPF practice questions
Practise OSPF neighbours, router IDs, metrics, areas and routing-table interpretation.
CCNA VLAN practice questions
Practise VLANs, access ports, trunks, allowed VLANs and switching scenarios.
CCNA STP practice questions
Practise spanning tree, root bridge election, port roles and STP troubleshooting.
CCNA EtherChannel practice questions
Practise LACP, PAgP, port-channel behaviour and bundle requirements.
CCNA ACL practice questions
Practise standard and extended ACLs, permit/deny logic and traffic filtering.
CCNA NAT practice questions
Practise static NAT, dynamic NAT, PAT and inside/outside address translation.
Practice this exam
Start a free 200-301 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 to enable network resource access..
What is the correct answer to this question?
The correct answer is: DNS: Translates domain names to IP addresses — Each network service has a distinct primary function: DNS translates names to IPs, DHCP automates IP assignment, NTP synchronizes time, SNMP manages devices, FTP transfers files, and HTTP serves web content.
What should I do if I get this 200-301 question wrong?
Review dNS resolves human-readable domain names into IP addresses to enable network resource access., then practise related 200-301 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
DNS resolves human-readable domain names into IP addresses to enable network resource access.
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
4 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 its primary function.
easy- ✓ A.DNS: Translates domain names to IP addresses
- B.DNS: Automates the assignment of IP addresses to devices
- C.DNS: Serves web pages to clients
- D.DNS: Manages network devices via a management information base
Why A: DNS translates domain names into IP addresses, enabling clients to reach servers by name. DHCP automates the assignment of IP addresses, subnet masks, default gateways, and other parameters to clients. NTP synchronizes the clocks of network devices to a common time source. Syslog collects and exports log messages from network devices to a centralized server for monitoring and troubleshooting.
Variation 2. Match each IP service symptom to the most likely service involved.
medium- ✓ A.DNS failures prevent name resolution
- B.Packet loss causes intermittent connectivity
- C.Bandwidth congestion slows transfers
- D.Jitter affects real-time services
Why A: Hostnames fail but direct IP access works because DNS resolves names to IP addresses; without DNS, name resolution stops while IP connectivity remains intact. Clients not receiving IP configuration automatically indicates a DHCP failure, since DHCP is the service responsible for dynamic address assignment. Log timestamps differing noticeably between devices points to an NTP issue, as NTP synchronizes clocks across the network. Administrators wanting one place to collect device events rely on Syslog, which centralizes event messages from multiple devices.
Variation 3. Match each network service to its primary purpose.
easy- ✓ A.DNS - Resolves domain names to IP addresses
- B.DNS - Assigns IP addresses to devices dynamically
- C.DNS - Provides secure remote access to network devices
- D.DNS - Manages network devices via SNMP
Why A: DNS resolves human-readable hostnames to IP addresses, enabling users to access websites by name. DHCP automatically assigns IP addresses, subnet masks, default gateways, and other parameters to clients, simplifying network configuration. NTP synchronizes clocks across network devices to ensure consistent timestamps for logs and transactions. Syslog sends event messages from network devices to a central logging server for monitoring and troubleshooting.
Variation 4. Which protocol is used to resolve a hostname such as www.example.com into an IP address?
easy- ✓ A.DNS
- B.DHCP
- C.NTP
- D.SNMP
Why A: DNS resolves names to addresses. DHCP hands out addressing parameters, NTP synchronizes time, and SNMP is used for management and monitoring.
Keep practising
More 200-301 practice questions
- A switchport connected to another switch should carry multiple VLANs, but it was manually configured as an access port.…
- What problem is HSRP designed to solve?
- Which TWO statements correctly describe the causes or implications of CRC errors, runts, giants, or output errors as see…
- You are connected to R1. Configure IPv4 and IPv6 addressing on R1's interfaces and verify reachability to R2. The curren…
- Which TWO statements accurately describe how AI/ML concepts are applied to network operations in modern enterprise netwo…
- Which TWO switch port configurations are required when connecting a Cisco IP phone and a desktop PC to a single access p…
Last reviewed: Apr 13, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.