Quick Answer
The answer is 802.11r, the IEEE standard for Fast BSS Transition (FT). This standard enables seamless roaming by allowing a wireless client to skip full re-authentication with the RADIUS server during handoffs; instead, it uses a cached Pairwise Master Key (PMK) from the initial authentication to perform a faster key exchange over the air or over the distribution system. On the CompTIA Network+ N10-009 exam, this concept tests your understanding of how to reduce roaming latency for real-time applications like VoIP, often appearing in a scenario where users experience call drops while moving between access points. A common trap is confusing 802.11r with 802.11k (neighbor reports) or 802.11v (network management), but remember: the “r” stands for “rapid roaming.” For a memory tip, think “r for re-authentication skip”—the client keeps its key, so it roams without reconnecting to the server.
This N10-009 practice question tests your understanding of network implementation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A network administrator wants to allow wireless clients to seamlessly roam between access points without re-authenticating to the RADIUS server for each transition. Which IEEE standard should be implemented?
802.11r
802.11r reduces latency for roaming by allowing key caching.
802.11k
Why wrong: 802.11k provides neighbor report information to help clients choose the best AP, but it does not handle authentication.
802.11w
Why wrong: 802.11w protects management frames, not roaming authentication.
802.1X
Why wrong: 802.1X is an authentication framework, but it does not specifically address fast roaming.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
802.11r
802.11r, also known as Fast BSS Transition (FT), enables wireless clients to roam between access points without re-authenticating to the RADIUS server by using a cached Pairwise Master Key (PMK) and performing a faster, over-the-air or over-the-DS key exchange. This reduces the time required for roaming handoffs, which is critical for real-time applications like VoIP.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
802.11r
Why this is correct
802.11r reduces latency for roaming by allowing key caching.
Related concept
Read the scenario before looking for a memorised answer.
802.11k
Why it's wrong here
802.11k provides neighbor report information to help clients choose the best AP, but it does not handle authentication.
802.11w
Why it's wrong here
802.11w protects management frames, not roaming authentication.
802.1X
Why it's wrong here
802.1X is an authentication framework, but it does not specifically address fast roaming.
Common exam traps
CompTIA often tests the distinction between 802.11k (which helps clients decide where to roam) and 802.11r (which speeds up the actual authentication process), leading candidates to confuse 'neighbor reports' with 'fast roaming authentication'.
Detailed technical explanation
802.11r achieves fast roaming by deriving a PMK-R0 from the initial 802.1X authentication, which is then distributed to a group of access points (the mobility domain). When a client roams, it uses a cached PMK-R1 derived from the PMK-R0, allowing a four-way handshake with the new AP without contacting the RADIUS server. In real-world deployments, this reduces roaming latency from hundreds of milliseconds (with full 802.1X re-auth) to under 50 ms, which is essential for voice and video traffic.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
The correct answer is: 802.11r — 802.11r, also known as Fast BSS Transition (FT), enables wireless clients to roam between access points without re-authenticating to the RADIUS server by using a cached Pairwise Master Key (PMK) and performing a faster, over-the-air or over-the-DS key exchange. This reduces the time required for roaming handoffs, which is critical for real-time applications like VoIP.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.
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