The answer is a security or authentication mismatch related to WLAN access. This is correct because the client successfully discovers the SSID and initiates the join process, but the repeated authentication failure indicates the issue lies at the security handshake stage—typically a mismatch in pre-shared keys, WPA2/WPA3 settings, or RADIUS credentials—rather than a physical-layer problem like signal strength or channel interference. On the CCNA 200-301 v2 exam, this question tests your ability to isolate the phase of WLAN connectivity failure: discovery versus authentication versus association. A common trap is to blame RF coverage when the client can already see the SSID; remember that if the laptop can list and attempt to join the network, the radio link is functional. The memory tip is “See it, but can’t be it”—the client sees the SSID but cannot authenticate, so focus on security settings, not signal.
CCNA Switching and Network Access Practice Question
This 200-301 practice question tests your understanding of switching and network access. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: a wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.. 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.
A user reports that a laptop can connect to the correct SSID but repeatedly fails authentication when joining the WLAN. Which category of issue is most strongly indicated?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A security or authentication mismatch related to WLAN access
The strongest indication is a wireless security or authentication mismatch rather than a pure RF coverage problem. In practical terms, the laptop can already see and attempt to join the correct SSID, which means discovery is working. Repeated authentication failure points more directly to credentials, security settings, or authentication-policy alignment than to channel or signal absence.
This question is about recognizing the stage of failure. The client is finding the WLAN, but it is not being accepted onto it.
Key principle: A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
A security or authentication mismatch related to WLAN access
Why this is correct
This is correct because the client can discover the SSID but fails when authentication should succeed.
Related concept
A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.
✗
A missing OSPF router ID on the access point
Why it's wrong here
This is wrong because OSPF router IDs are unrelated to WLAN client authentication.
When this WOULD be correct
If the question were about routing issues affecting network connectivity, such as a scenario where a device cannot communicate with other routers due to OSPF misconfigurations, then a missing OSPF router ID on the access point would be the correct answer.
✗
A routed-port mismatch on the switch uplink
Why it's wrong here
This is wrong because the symptom points specifically to wireless join/authentication behavior.
When this WOULD be correct
If the exam question described a scenario where a device is unable to route traffic due to mismatched configurations between a switch and a router, specifically mentioning routed ports, then option C would be correct. For example, if a user reported that they could not access the internet despite being connected to the WLAN, and troubleshooting revealed a routed-port mismatch, this option would apply.
✗
A DHCP relay problem on the client
Why it's wrong here
This is wrong because authentication failure occurs before ordinary IP configuration becomes the main issue.
When this WOULD be correct
In a scenario where a user reports that their device connects to the SSID but cannot obtain an IP address, and the question specifically asks about issues related to IP assignment rather than authentication, option D would be correct as it directly relates to DHCP relay configurations.
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.
✓A security or authentication mismatch related to WLAN accessCorrect answer▾
Why this is correct
This is correct because the client can discover the SSID but fails when authentication should succeed.
✗A missing OSPF router ID on the access pointWrong answer — click to see why▾
Why this is wrong here
Option B is incorrect because a missing OSPF router ID on the access point pertains to routing protocols and does not directly affect WLAN authentication issues. The user's inability to authenticate is related to security settings rather than routing configurations.
★ When this WOULD be the correct answer
If the question were about routing issues affecting network connectivity, such as a scenario where a device cannot communicate with other routers due to OSPF misconfigurations, then a missing OSPF router ID on the access point would be the correct answer.
Why candidates choose this
Candidates might choose this option due to a misunderstanding of the relationship between routing and wireless connectivity, mistakenly believing that routing issues could impact WLAN access and authentication.
✗A routed-port mismatch on the switch uplinkWrong answer — click to see why▾
Why this is wrong here
A routed-port mismatch on the switch uplink is unrelated to WLAN authentication issues; it pertains to Layer 2 and Layer 3 connectivity rather than wireless security protocols. The problem described involves authentication failures, which are not caused by switch uplink configurations.
★ When this WOULD be the correct answer
If the exam question described a scenario where a device is unable to route traffic due to mismatched configurations between a switch and a router, specifically mentioning routed ports, then option C would be correct. For example, if a user reported that they could not access the internet despite being connected to the WLAN, and troubleshooting revealed a routed-port mismatch, this option would apply.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of network layers, mistakenly linking switch configurations to wireless issues. They might also recall scenarios where switch configurations impacted overall connectivity, leading to confusion about the specific context of WLAN authentication.
✗A DHCP relay problem on the clientWrong answer — click to see why▾
Why this is wrong here
This option is wrong because a DHCP relay problem would typically result in the client not receiving an IP address, preventing it from connecting to the network at all, rather than failing authentication after connecting to the SSID.
★ When this WOULD be the correct answer
In a scenario where a user reports that their device connects to the SSID but cannot obtain an IP address, and the question specifically asks about issues related to IP assignment rather than authentication, option D would be correct as it directly relates to DHCP relay configurations.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of the authentication process, thinking that if a device connects to the SSID, it must be receiving an IP address, and therefore any issues must be related to DHCP rather than authentication.
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 exam trap is selecting options related to routing protocols or DHCP relay issues when a client fails to authenticate on a WLAN. Candidates may incorrectly assume that IP configuration problems or routing mismatches cause authentication failures. However, authentication occurs before IP assignment, so DHCP or OSPF issues cannot cause repeated authentication failures. This trap distracts from the correct focus on wireless security settings and credentials, which are the root cause when a client sees the SSID but cannot authenticate.
Detailed technical explanation
How to think about this question
Wireless LAN (WLAN) authentication is a critical step in the process where a client device proves its identity to the wireless network before gaining access. This process involves protocols such as WPA2-Enterprise or WPA3, which use credentials like usernames and passwords, certificates, or pre-shared keys. The client must successfully complete authentication after associating with the correct SSID to access network resources. Failure at this stage indicates a problem with security parameters rather than physical connectivity or network routing.
In Cisco WLAN environments, when a client can see and select the correct SSID but repeatedly fails authentication, it strongly suggests a mismatch in security settings. This could be due to incorrect credentials, incompatible encryption types, or misconfigured authentication servers like RADIUS. The device’s association with the SSID confirms that Layer 1 and Layer 2 connectivity are functional, so the issue lies specifically in Layer 2 or Layer 3 security policies.
A common exam trap is confusing authentication failure with connectivity issues such as DHCP or routing problems. DHCP relay or OSPFrouter ID problems occur after successful authentication and association, during IP configuration or routing phases. Misinterpreting these symptoms can lead to selecting incorrect answers related to routing protocols or uplink port configurations. Practically, authentication failure prevents the client from joining the network, so troubleshooting should focus on wireless security settings and credentials first.
KKey Concepts to Remember
A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.
Authentication failure despite correct SSID association indicates a security or credential mismatch rather than physical connectivity issues.
Cisco WLAN authentication often uses protocols like WPA2-Enterprise, which require matching credentials and compatible encryption settings.
DHCP relay and routing protocols like OSPF operate after successful authentication and association, so they do not cause authentication failures.
Switch uplink port configurations affect wired network connectivity but do not directly impact wireless client authentication processes.
Repeated authentication failures suggest checking RADIUS server settings, encryption types, and client credentials in Cisco wireless deployments.
SSID discovery and association confirm Layer 1 and Layer 2 connectivity, isolating the problem to Layer 2 security or authentication mechanisms.
Exam questions about WLAN failures require distinguishing between association, authentication, and IP configuration stages for accurate troubleshooting.
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
A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
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 a wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN., then practise related 200-301 questions on the same topic to reinforce the concept.
Switching and Network Access — This question tests Switching and Network Access — A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN..
What is the correct answer to this question?
The correct answer is: A security or authentication mismatch related to WLAN access — The strongest indication is a wireless security or authentication mismatch rather than a pure RF coverage problem. In practical terms, the laptop can already see and attempt to join the correct SSID, which means discovery is working. Repeated authentication failure points more directly to credentials, security settings, or authentication-policy alignment than to channel or signal absence.
This question is about recognizing the stage of failure. The client is finding the WLAN, but it is not being accepted onto it.
What should I do if I get this 200-301 question wrong?
Review a wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
A wireless client must successfully authenticate after associating with the correct SSID to gain access to the WLAN.
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