The answer is DNS or name-resolution configuration for the host or service. This is correct because the host can already reach the destination by IP address, confirming that switching, routing, and Layer 3 connectivity are fully functional; the failure occurs only when a hostname is used, isolating the fault to the name-resolution process rather than the data path itself. On the CCNA 200-301 v2 exam, this scenario tests your ability to distinguish between network-layer reachability and application-layer dependencies, often appearing as a classic “what do you check next” troubleshooting question where the trap is to recheck routing or ACLs when the IP works fine. A strong memory tip for DNS troubleshooting is “IP good, name bad? Check the resolver, not the router.”
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 devices to access network resources by name rather than numeric IPs.. 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.
Exhibit
User tests:
- ping 192.168.200.50 = success
- HTTP to 192.168.200.50 = success
- HTTP to app.internal.lab = fail
Based on the exhibit, what is the strongest next troubleshooting focus?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DNS or name-resolution configuration for the host or service
The strongest next troubleshooting focus is DNS. In practical terms, the host can already reach the destination by IP address, which means switching, routing, and general Layer 3 connectivity are working for that path. The failure occurs only when the hostname is used, so the most likely remaining fault domain is name resolution rather than the data path itself.
This is a classic 'what do you check next' support question and very close to real-world helpdesk and network triage logic.
Key principle: DNS translates hostnames into IP addresses, enabling devices to access network resources by name rather than numeric IPs.
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 or name-resolution configuration for the host or service
Why this is correct
This is correct because the difference between IP success and hostname failure points directly to DNS-related troubleshooting.
Related concept
DNS translates hostnames into IP addresses, enabling devices to access network resources by name rather than numeric IPs.
✗
STP root bridge priority on the access switch
Why it's wrong here
This is wrong because the network path to the IP address already works.
When this WOULD be correct
In a scenario where the question asks about network topology issues or VLAN configurations affecting traffic flow, focusing on the STP root bridge priority would be appropriate. For example, if the question describes a network experiencing broadcast storms or connectivity issues due to misconfigured STP settings, this option would be correct.
✗
PPP encapsulation on the WAN edge
Why it's wrong here
This is wrong because the symptom is specific to hostname access, not WAN data-link negotiation.
When this WOULD be correct
In a different scenario where the question involves troubleshooting a WAN connection issue, specifically related to PPP configurations, this option would be correct. For example, if the question asked about connectivity problems between two routers using PPP, then examining encapsulation settings would be relevant.
✗
EtherChannel member consistency on the distribution switches
Why it's wrong here
This is wrong because the client already reaches the service by IP.
When this WOULD be correct
In a different scenario where the question involves troubleshooting network performance issues related to load balancing across multiple links, a focus on EtherChannel member consistency would be appropriate. For example, if the question indicated that users were experiencing intermittent connectivity issues due to misconfigured EtherChannel settings, this option would be correct.
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 or name-resolution configuration for the host or serviceCorrect answer▾
Why this is correct
This is correct because the difference between IP success and hostname failure points directly to DNS-related troubleshooting.
✗STP root bridge priority on the access switchWrong answer — click to see why▾
Why this is wrong here
STP root bridge priority affects Layer 2 loop prevention and path selection, but since the client can already reach the service by IP, the Layer 2 path is functional. The issue is specific to hostname resolution, not spanning-tree topology.
★ When this WOULD be the correct answer
In a scenario where the question asks about network topology issues or VLAN configurations affecting traffic flow, focusing on the STP root bridge priority would be appropriate. For example, if the question describes a network experiencing broadcast storms or connectivity issues due to misconfigured STP settings, this option would be correct.
Why candidates choose this
Students might confuse a connectivity problem with a Layer 2 issue, especially if they suspect a suboptimal path causing packet loss. However, the symptom of hostname failure with IP success clearly points to DNS, not STP.
✗PPP encapsulation on the WAN edgeWrong answer — click to see why▾
Why this is wrong here
PPP encapsulation is a WAN data-link protocol used for point-to-point links. The symptom is about hostname resolution, which is a Layer 7 (application) issue, not a Layer 2 data-link negotiation problem.
★ When this WOULD be the correct answer
In a different scenario where the question involves troubleshooting a WAN connection issue, specifically related to PPP configurations, this option would be correct. For example, if the question asked about connectivity problems between two routers using PPP, then examining encapsulation settings would be relevant.
Why candidates choose this
Test-takers might think that WAN issues could cause intermittent connectivity, but the fact that IP access works rules out WAN encapsulation problems. The confusion arises from associating all connectivity issues with WAN links.
✗EtherChannel member consistency on the distribution switchesWrong answer — click to see why▾
Why this is wrong here
EtherChannel member consistency ensures proper load balancing and link aggregation. Since the client can already reach the service by IP, the EtherChannel is functioning correctly. The problem is not at the distribution layer but at the name resolution layer.
★ When this WOULD be the correct answer
In a different scenario where the question involves troubleshooting network performance issues related to load balancing across multiple links, a focus on EtherChannel member consistency would be appropriate. For example, if the question indicated that users were experiencing intermittent connectivity issues due to misconfigured EtherChannel settings, this option would be correct.
Why candidates choose this
Students might suspect a distribution layer issue if they see multiple switches and think of EtherChannel misconfiguration causing packet drops. However, the IP success indicates the path is fine, so the focus should be on DNS.
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 to select options related to Layer 2 or WAN link issues, such as STP root bridge priority or PPP encapsulation, because candidates associate connectivity problems with these technologies. However, the question states that IP connectivity works, which means switching and routing are operational. Choosing these options wastes time and misses the core issue, which is DNS or name-resolution failure. Candidates must carefully distinguish between IP connectivity and hostname resolution failures to avoid this common pitfall.
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, enabling users and applications to access network resources by name rather than numeric IPs. In Cisco networking and CCNA contexts, DNS resolution is fundamental for connectivity beyond basic IP routing, especially when hosts or services are referenced by hostname. When a device can ping an IP address but not a hostname, it indicates that Layer 3 routing and switching are functioning, but the name resolution process is failing.
Troubleshooting DNS involves verifying the DNS server configuration on the host or router, ensuring the DNS server is reachable, and confirming that the DNS records exist and are correct. The decision process in this question hinges on the fact that IP connectivity is successful, so the next logical step is to isolate the failure to DNS or name-resolution configuration. This approach aligns with CCNA best practices for layered troubleshooting, focusing on the service layer after confirming network layer functionality.
A common exam trap is to misattribute hostname resolution failures to lower-layer issues such as spanning-tree protocol (STP) or WAN encapsulation problems. However, since the IP address is reachable, these options are irrelevant here. Practically, this means that network engineers should avoid wasting time on Layer 2 or WAN link troubleshooting when the symptom is strictly related to hostname resolution, focusing instead on DNS configurations and server availability.
KKey Concepts to Remember
DNS translates hostnames into IP addresses, enabling devices to access network resources by name rather than numeric IPs.
Successful IP connectivity with hostname resolution failure indicates a DNS or name-resolution configuration issue rather than routing or switching problems.
Cisco devices use configured DNS servers to resolve hostnames, and misconfigured or unreachable DNS servers cause hostname access failures.
Spanning Tree Protocol (STP) affects Layer 2 path selection but does not impact IP connectivity if pinging an IP address succeeds.
PPP encapsulation issues affect WAN link establishment but do not cause hostname resolution failures when IP connectivity is confirmed.
EtherChannel member inconsistencies disrupt link aggregation but do not prevent IP-level connectivity if pinging the IP address works.
Troubleshooting layered network issues requires isolating the failure domain by verifying connectivity at each OSI layer sequentially.
Name resolution problems are best diagnosed by checking DNS server settings, DNS client configuration, and DNS record correctness.
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 devices to access network resources by name rather than numeric IPs.
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.
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 devices to access network resources by name rather than numeric IPs., 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 devices to access network resources by name rather than numeric IPs..
What is the correct answer to this question?
The correct answer is: DNS or name-resolution configuration for the host or service — The strongest next troubleshooting focus is DNS. In practical terms, the host can already reach the destination by IP address, which means switching, routing, and general Layer 3 connectivity are working for that path. The failure occurs only when the hostname is used, so the most likely remaining fault domain is name resolution rather than the data path itself.
This is a classic 'what do you check next' support question and very close to real-world helpdesk and network triage logic.
What should I do if I get this 200-301 question wrong?
Review dNS translates hostnames into IP addresses, enabling devices to access network resources by name rather than numeric IPs., 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 devices to access network resources by name rather than numeric IPs.
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 →
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.
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.