The answer is DNS, which resolves domain names to IP addresses, directly addressing the issue of translating human-readable names into routable network addresses. This is correct because without DNS, users would have to memorize numeric IPs for every resource, making network communication impractical. On the CCNA 200-301 v2 exam, this matching question tests your ability to distinguish each service’s primary function: DHCP assigns IP configurations, NTP synchronizes clocks, SNMP monitors and manages devices, Syslog collects and stores log messages, and NetFlow analyzes traffic flows for performance and security. A common trap is confusing Syslog with SNMP—remember that Syslog is for logging events, while SNMP is for polling and managing device status. A useful memory tip is the acronym “D-D-N-S-S-N”: DNS does names, DHCP gives IPs, NTP sets time, SNMP manages, Syslog logs, NetFlow flows.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: dNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management.. 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 service to the issue it most directly addresses.
DNS (Domain Name System) translates human-readable domain names (e.g., www.example.com) into IP addresses, enabling devices to locate resources on a network.
B
DHCP: Synchronizes time across network devices
Why wrong: DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses and other network parameters to devices, not time synchronization.
C
NTP: Collects and stores system logs
Why wrong: NTP (Network Time Protocol) synchronizes clocks between computer systems over a network, not for log collection.
D
SNMP: Analyzes network traffic flows
Why wrong: SNMP (Simple Network Management Protocol) is used for monitoring and managing network devices, not for traffic flow analysis.
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
Each service directly addresses a specific network issue: DNS resolves names, DHCP assigns IPs, NTP syncs time, SNMP manages devices, Syslog collects logs, and NetFlow analyzes traffic.
Key principle: DNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management.
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 devices to locate resources on a network.
Related concept
DNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management.
✗
DHCP: Synchronizes time across network devices
Why it's wrong here
DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses and other network parameters to devices, not time synchronization.
✗
NTP: Collects and stores system logs
Why it's wrong here
NTP (Network Time Protocol) synchronizes clocks between computer systems over a network, not for log collection.
✗
SNMP: Analyzes network traffic flows
Why it's wrong here
SNMP (Simple Network Management Protocol) is used for monitoring and managing network devices, not for traffic flow analysis.
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 devices to locate resources on a network.
✗DHCP: Synchronizes time across network devicesWrong answer — click to see why▾
Why this is wrong here
DHCP can provide an NTP server option, but its primary function is IP address assignment, not time sync.
Why candidates choose this
Candidates may confuse DHCP's ability to offer NTP server addresses with actually synchronizing time.
✗NTP: Collects and stores system logsWrong answer — click to see why▾
Why this is wrong here
Syslog is the protocol used for log collection, not NTP.
Why candidates choose this
Candidates might think time-stamping logs is the same as collecting logs, but NTP only provides accurate time, not log storage.
✗SNMP: Analyzes network traffic flowsWrong answer — click to see why▾
Why this is wrong here
NetFlow is the technology designed for traffic flow analysis, while SNMP collects device statistics like CPU load or interface errors.
Why candidates choose this
Both SNMP and NetFlow are used for network monitoring, leading candidates to confuse their specific functions.
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 services that have overlapping or complementary roles, such as DHCP providing NTP server options or SNMP and NetFlow both being monitoring tools. Focus on the primary function of each service, not secondary capabilities.
Detailed technical explanation
How to think about this question
DNS (Domain Name System) is a critical IP service that translates human-readable hostnames into IP addresses. In Cisco networks, DNS allows devices to resolve names for routing, management, and application access. When DNS fails, devices can still communicate via IP addresses but cannot resolve domain names, leading to connectivity issues that appear as name resolution failures. Understanding DNS behavior helps isolate problems related to hostname resolution without confusing them with IP connectivity issues.
DHCP (Dynamic Host Configuration Protocol) automates IP address assignment and related network parameters like subnet mask, default gateway, and DNS servers. In Cisco environments, DHCP servers dynamically allocate addresses to hosts, simplifying network management. When DHCP fails, hosts do not receive IP addresses automatically, causing them to be unable to communicate on the network. Troubleshooting DHCP involves verifying server availability, scope configuration, and client lease status.
NTP (Network Time Protocol) synchronizes clocks across network devices, ensuring consistent timestamps for logs and events. Cisco devices rely on accurate time for security protocols, logging, and troubleshooting. If NTP is misconfigured or unreachable, device clocks drift, causing inconsistent log timestamps and potential authentication failures. Syslog collects and centralizes event messages from devices, aiding network monitoring and troubleshooting. While syslog depends on accurate time, it is distinct from NTP and focuses on event collection rather than time synchronization.
KKey Concepts to Remember
DNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management.
DHCP dynamically assigns IP addresses and network parameters to hosts, preventing manual configuration errors and enabling network scalability.
NTP synchronizes device clocks across the network, ensuring consistent timestamps for logs, security, and troubleshooting.
Syslog centralizes event message collection from multiple devices, facilitating network monitoring and incident response.
Name resolution failures indicate DNS issues, while lack of IP addressing points to DHCP problems in Cisco networks.
Inconsistent device clocks or log timestamps typically reveal NTP synchronization problems rather than syslog issues.
Syslog depends on accurate time from NTP but serves a different function by collecting and storing event logs.
Correctly matching symptoms to IP services improves troubleshooting accuracy and exam answer selection in Cisco networking contexts.
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 translates hostnames into IP addresses, enabling name resolution essential for network communication and management.
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 translates hostnames into IP addresses, enabling name resolution essential for network communication and management. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review dNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management., then practise related 200-301 questions on the same topic to reinforce the concept.
Network Services and Security — This question tests Network Services and Security — DNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management..
What is the correct answer to this question?
The correct answer is: DNS: Resolves domain names to IP addresses — Each service directly addresses a specific network issue: DNS resolves names, DHCP assigns IPs, NTP syncs time, SNMP manages devices, Syslog collects logs, and NetFlow analyzes traffic.
What should I do if I get this 200-301 question wrong?
Review dNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
DNS translates hostnames into IP addresses, enabling name resolution essential for network communication and management.
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