CCNA Network Infrastructure and Connectivity Practice Question
This 200-301 practice question tests your understanding of network infrastructure and connectivity. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Network Topology
You are connected to WLC-1 via SSH. A new SSID 'CorpSecure' must be configured for 5 GHz clients using WPA3-Personal. However, after creation, clients can see the SSID but fail to associate. Review the WLC configuration and fix the issue so that clients can successfully associate and obtain an IP address from VLAN 100 (subnet 10.0.100.0/24).
WLC-1# show running-config
!
hostname WLC-1
!
interface GigabitEthernet0/0
ip address 192.168.1.10 255.255.255.0
!
interface GigabitEthernet0/1
ip address 10.0.0.1 255.255.255.252
!
interface GigabitEthernet0/2
ip address 10.0.100.1 255.255.255.0
!
wireless management interface GigabitEthernet0/0
!
wlan CorpSecure 1 CorpSecure
ssid CorpSecure
security wpa psk ascii 7 1234567890
no security wpa aes-ccmp
security wpa2 ciphers aes
security wpa2 psk ascii 7 1234567890
no shutdown
!
wireless ap 1
country US
!
wireless client vlan 100
!
A
Change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, set the radio policy to 5 GHz, and ensure the WLAN is mapped to the dynamic interface for VLAN 100.
This is correct because WPA3-Personal requires AES-CCMP encryption, and the radio policy must be set to 5 GHz to match the requirement. Additionally, the management interface must be on the correct VLAN for client traffic to reach VLAN 100.
B
Change the WLAN security to WPA2-Personal, enable TKIP encryption, and set the radio policy to 5 GHz.
Why wrong: This is incorrect because the requirement specifies WPA3-Personal, not WPA2-Personal. WPA3 uses AES-CCMP, not TKIP, and TKIP is not supported with WPA3.
C
Change the WLAN security to WPA3-Personal, enable AES-CCMP, but leave the radio policy as 'All' (both 2.4 GHz and 5 GHz).
Why wrong: This is incorrect because the requirement specifies that the SSID should be for 5 GHz clients only. Leaving the radio policy as 'All' would allow 2.4 GHz clients to associate, which is not desired and could cause configuration issues.
D
Change the WLAN security to WPA3-Personal, enable AES-CCMP, set the radio policy to 5 GHz, but do not enable the WLAN after changes.
Why wrong: This is incorrect because the WLAN must be enabled after configuration changes for clients to associate. The command 'config wlan enable 1' is necessary to activate the WLAN.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, set the radio policy to 5 GHz, and ensure the WLAN is mapped to the dynamic interface for VLAN 100.
The SSID was configured with WPA2 instead of WPA3. The WLC also had no radio policy set for 5 GHz only. To fix, change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, and set the radio policy to 5 GHz. Additionally, ensure the WLAN is mapped to the appropriate dynamic interface for VLAN 100, not the management interface, and that client VLAN 100 is reachable. The commands to modify the WLAN are: config wlan security wpa3 1 enable, config wlan security wpa3 psk ascii CorpSecurePass123 1, config wlan radio policy 802.11a-only 1, and config wlan enable 1.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, set the radio policy to 5 GHz, and ensure the WLAN is mapped to the dynamic interface for VLAN 100.
Why this is correct
This is correct because WPA3-Personal requires AES-CCMP encryption, and the radio policy must be set to 5 GHz to match the requirement. Additionally, the management interface must be on the correct VLAN for client traffic to reach VLAN 100.
Related concept
Access ports place end devices into a single VLAN.
✗
Change the WLAN security to WPA2-Personal, enable TKIP encryption, and set the radio policy to 5 GHz.
Why it's wrong here
This is incorrect because the requirement specifies WPA3-Personal, not WPA2-Personal. WPA3 uses AES-CCMP, not TKIP, and TKIP is not supported with WPA3.
✗
Change the WLAN security to WPA3-Personal, enable AES-CCMP, but leave the radio policy as 'All' (both 2.4 GHz and 5 GHz).
Why it's wrong here
This is incorrect because the requirement specifies that the SSID should be for 5 GHz clients only. Leaving the radio policy as 'All' would allow 2.4 GHz clients to associate, which is not desired and could cause configuration issues.
✗
Change the WLAN security to WPA3-Personal, enable AES-CCMP, set the radio policy to 5 GHz, but do not enable the WLAN after changes.
Why it's wrong here
This is incorrect because the WLAN must be enabled after configuration changes for clients to associate. The command 'config wlan enable 1' is necessary to activate the WLAN.
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.
✓Change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, set the radio policy to 5 GHz, and ensure the WLAN is mapped to the dynamic interface for VLAN 100.Correct answer▾
Why this is correct
This is correct because WPA3-Personal requires AES-CCMP encryption, and the radio policy must be set to 5 GHz to match the requirement. Additionally, the management interface must be on the correct VLAN for client traffic to reach VLAN 100.
✗Change the WLAN security to WPA2-Personal, enable TKIP encryption, and set the radio policy to 5 GHz.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that WPA2-Personal with TKIP does not meet the WPA3-Personal requirement; WPA3 mandates AES-CCMP.
Why candidates choose this
Candidates might pick this because they are more familiar with WPA2 and may not realize that WPA3 is required, or they confuse TKIP with AES.
✗Change the WLAN security to WPA3-Personal, enable AES-CCMP, but leave the radio policy as 'All' (both 2.4 GHz and 5 GHz).Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that the radio policy must be set to 5 GHz only, not 'All', to restrict access to 5 GHz clients.
Why candidates choose this
Candidates might pick this because they think 'All' is acceptable or they forget to change the radio policy, assuming it defaults correctly.
✗Change the WLAN security to WPA3-Personal, enable AES-CCMP, set the radio policy to 5 GHz, but do not enable the WLAN after changes.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that the WLAN remains disabled, so clients cannot associate even if other settings are correct.
Why candidates choose this
Candidates might pick this because they focus only on security and radio settings, forgetting the final step of enabling the WLAN, which is a common oversight.
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: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Trap categories for this question
Command / output trap
This is incorrect because the WLAN must be enabled after configuration changes for clients to associate. The command 'config wlan enable 1' is necessary to activate the WLAN.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
Access ports place end devices into a single VLAN.
Trunk ports carry multiple VLANs between switches.
Allowed VLAN lists decide which VLANs can cross a trunk.
Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
→Use show vlan brief to verify access VLANs.
→Use show interfaces trunk to verify trunk state and allowed VLANs.
→Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
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 VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 200-301 questions on switching, trunking, and access-port configuration.
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: Change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, set the radio policy to 5 GHz, and ensure the WLAN is mapped to the dynamic interface for VLAN 100. — The SSID was configured with WPA2 instead of WPA3. The WLC also had no radio policy set for 5 GHz only. To fix, change the WLAN security to WPA3-Personal, enable AES-CCMP for WPA3, and set the radio policy to 5 GHz. Additionally, ensure the WLAN is mapped to the appropriate dynamic interface for VLAN 100, not the management interface, and that client VLAN 100 is reachable. The commands to modify the WLAN are: config wlan security wpa3 1 enable, config wlan security wpa3 psk ascii CorpSecurePass123 1, config wlan radio policy 802.11a-only 1, and config wlan enable 1.
What should I do if I get this 200-301 question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 200-301 questions on switching, trunking, and access-port configuration.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
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