Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
Exhibit
WLAN security: WPA2-Enterprise AP log: RADIUS server timeout SSID is visible and clients associate, but login fails
Exhibit: Clients can see the corporate SSID but fail authentication after entering valid usernames and passwords. Which issue is the best explanation?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
The AP is using the wrong RF channel
A channel issue would affect discovery or quality, not specifically 802.1X authentication.
B
Best answer
The RADIUS path or shared secret is failing
WPA2-Enterprise depends on successful RADIUS authentication.
C
Distractor review
The SSID must be hidden for enterprise authentication
A hidden SSID is not required.
D
Distractor review
The clients need a voice VLAN assignment first
Voice VLANs are unrelated to wireless user authentication.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is to confuse wireless connectivity issues with authentication failures. For example, candidates might incorrectly choose the wrong RF channel or hidden SSID as causes because these affect wireless signal discovery or quality. However, these issues do not cause authentication failures after valid credentials are entered. The trap lies in assuming that SSID visibility problems or VLAN assignments impact 802.1X authentication, when in reality, the failure occurs due to RADIUS server communication problems or shared secret mismatches. Understanding this distinction is critical to selecting the correct answer.
Technical deep dive
How to think about this question
WPA2-Enterprise wireless networks use 802.1X authentication, which relies on a RADIUS server to validate client credentials. When a client attempts to connect, the access point (AP) acts as an authenticator and forwards the authentication request to the RADIUS server. The RADIUS server checks the username and password against its database and sends an accept or reject message back to the AP. This process ensures secure user authentication beyond just SSID visibility. If clients can see the corporate SSID but fail authentication despite entering valid credentials, the most likely cause is a failure in the RADIUS communication path or a mismatch in the shared secret between the AP and the RADIUS server. The shared secret is a preconfigured password used to secure RADIUS messages. If this secret is incorrect or the RADIUS server is unreachable, authentication requests will fail, causing login attempts to be rejected even though the SSID is visible. A common exam trap is to confuse wireless connectivity issues with authentication failures. For example, an incorrect RF channel or hidden SSID affects client discovery or connection quality but does not cause authentication failures after credential submission. In practice, network engineers must verify RADIUS server reachability and shared secret configuration to resolve such authentication issues, ensuring seamless WPA2-Enterprise wireless access.
KKey Concepts to Remember
- WPA2-Enterprise wireless networks use 802.1X authentication that depends on a RADIUS server to validate user credentials.
- The access point forwards client authentication requests to the RADIUS server using a shared secret for secure communication.
- If the RADIUS server is unreachable or the shared secret is incorrect, clients fail authentication despite seeing the SSID.
- SSID visibility alone does not guarantee successful authentication in enterprise wireless networks.
- Incorrect RF channel settings affect wireless signal quality but do not cause authentication failures after credential input.
- Hiding the SSID is not required for enterprise authentication and does not impact 802.1X authentication success.
- Voice VLAN assignments are unrelated to wireless user authentication and do not affect WPA2-Enterprise login processes.
- Troubleshooting WPA2-Enterprise failures requires verifying RADIUS server connectivity and shared secret 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.
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.
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.
CCNA DHCP practice questions
Practise DHCP scopes, relay, leases and troubleshooting.
CCNA show ip route practice questions
Practise routing-table output, longest-prefix match, AD and route selection.
CCNA show interfaces trunk practice questions
Practise trunk verification and VLAN forwarding across switches.
CCNA wireless security practice questions
Practise WLAN security, authentication and wireless architecture concepts.
CCNA IPv6 practice questions
Practise IPv6 addressing, routes, neighbour discovery and common IPv6 exam traps.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
WPA2-Enterprise wireless networks use 802.1X authentication that depends on a RADIUS server to validate user credentials.
What is the correct answer to this question?
The correct answer is: The RADIUS path or shared secret is failing — WPA2-Enterprise relies on 802.1X with a RADIUS server. If the RADIUS server is unreachable or the shared secret is wrong, users can see the SSID and attempt to authenticate, but the login process fails.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
Loading comments…
Sign in to join the discussion.