The answer is that the 'security ft over-the-ds' command enables 802.11r fast roaming using the distribution system for key exchange. This is correct because Fast Transition (802.11r) offers two roaming methods: Over-the-Air, where keys are exchanged directly between the client and the target access point, and Over-the-DS, where the client sends key material through the current access point across the wired distribution system to the target AP. The Over-the-DS method reduces over-the-air overhead and is often preferred in dense deployments. On the ENCOR 350-401 exam, this command tests your understanding of 802.11r roaming mechanics and the distinction between the two FT methods; a common trap is confusing Over-the-DS with Over-the-Air or assuming it disables FT entirely. Remember the memory tip: “DS” stands for “Distribution System,” so Over-the-DS means the keys travel through the wired network, not through the air.
350-401 Wireless Infrastructure Practice Question
This 350-401 practice question tests your understanding of wireless infrastructure. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Examine the following configuration on a Cisco 9800 WLC:
wireless profile policy test-policy
no security wpa
no security wpa2
security wpa3
security wpa3 akm sae
security ft over-the-ds
What is the effect of the 'security ft over-the-ds' command?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It enables 802.11r fast roaming using the distribution system for key exchange.
The 'ft over-the-ds' command enables Fast Transition (802.11r) using the over-the-DS (Distribution System) method, which is used for seamless roaming.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
It enables 802.11r fast roaming using over-the-air messaging.
Why it's wrong here
Over-the-air is the default; 'over-the-ds' specifies a different method.
✓
It enables 802.11r fast roaming using the distribution system for key exchange.
Why this is correct
Over-the-DS uses the wired network for key distribution.
Related concept
Read the scenario before looking for a memorised answer.
✗
It disables fast roaming for this policy.
Why it's wrong here
The command enables a specific fast roaming method.
✗
It configures the AP to use a different radio band.
Why it's wrong here
Fast roaming is independent of radio band selection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
The command enables a specific fast roaming method.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-401 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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 350-401 question in full detail.
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Wireless Infrastructure — This question tests Wireless Infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It enables 802.11r fast roaming using the distribution system for key exchange. — The 'ft over-the-ds' command enables Fast Transition (802.11r) using the over-the-DS (Distribution System) method, which is used for seamless roaming.
What should I do if I get this 350-401 question wrong?
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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