- A
RRM automatically selects the best channel for each AP based on interference measurements.
Correct because RRM's Dynamic Channel Assignment (DCA) algorithm uses real-time RF data to assign channels with minimal interference.
- B
RRM requires a dedicated hardware controller to perform RF calculations.
Why wrong: Incorrect because RRM runs as a software process on the Wireless LAN Controller (WLC) and does not require dedicated hardware.
- C
RRM can adjust the transmit power of APs to optimize coverage and reduce co-channel interference.
Correct because RRM's Dynamic Transmit Power Control (DTPC) adjusts AP power levels based on coverage requirements and interference.
- D
RRM uses a leader AP to collect and distribute RF measurements to other APs in the same RF group.
Correct because in an RRM RF group, one AP is elected as the leader to aggregate measurements and coordinate channel/power changes.
- E
RRM automatically enables client load balancing across APs in the same coverage area.
Why wrong: Incorrect because client load balancing is a separate feature (e.g., using 802.11k/v or Cisco's own load balancing) and is not part of RRM.
Quick Answer
The answer is that RRM uses a leader AP to collect and distribute RF measurements to other APs in the same RF group. This is correct because Cisco Radio Resource Management (RRM) is a distributed algorithm that runs on the Wireless LAN Controller, not on a dedicated hardware controller, and it dynamically adjusts channel and power settings based on real-time RF measurements from the environment. The leader AP acts as the coordinator for its RF group, gathering neighbor data and propagating optimized parameters to all member APs, which allows the system to adapt to interference and coverage holes without manual intervention. On the ENCOR 350-401 exam, this topic tests your understanding of how RRM differs from static RF configuration and from features like client load balancing, which is a separate mechanism. A common trap is assuming RRM requires a hardware controller or that it automatically balances client loads—neither is true. Memory tip: think of the leader AP as the "captain" of the RF group, collecting the "weather report" (measurements) and sending out the "flight plan" (channel and power changes).
CCNP 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.
Which three statements about RRM (Radio Resource Management) in a Cisco wireless LAN are true? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
RRM automatically selects the best channel for each AP based on interference measurements.
RRM dynamically adjusts channel and power settings based on RF measurements, uses a leader AP to coordinate, and can be configured to run at a scheduled interval. It does not require a dedicated hardware controller (it runs on the WLC) and does not automatically enable client load balancing (that is a separate feature).
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
RRM automatically selects the best channel for each AP based on interference measurements.
Why this is correct
Correct because RRM's Dynamic Channel Assignment (DCA) algorithm uses real-time RF data to assign channels with minimal interference.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
RRM requires a dedicated hardware controller to perform RF calculations.
Why it's wrong here
Incorrect because RRM runs as a software process on the Wireless LAN Controller (WLC) and does not require dedicated hardware.
- ✓
RRM can adjust the transmit power of APs to optimize coverage and reduce co-channel interference.
Why this is correct
Correct because RRM's Dynamic Transmit Power Control (DTPC) adjusts AP power levels based on coverage requirements and interference.
Related concept
OSPF neighbours must agree on key parameters.
- ✓
RRM uses a leader AP to collect and distribute RF measurements to other APs in the same RF group.
Why this is correct
Correct because in an RRM RF group, one AP is elected as the leader to aggregate measurements and coordinate channel/power changes.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
RRM automatically enables client load balancing across APs in the same coverage area.
Why it's wrong here
Incorrect because client load balancing is a separate feature (e.g., using 802.11k/v or Cisco's own load balancing) and is not part of RRM.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-401 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 350-401 question test?
Wireless Infrastructure — This question tests Wireless Infrastructure — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: RRM automatically selects the best channel for each AP based on interference measurements. — RRM dynamically adjusts channel and power settings based on RF measurements, uses a leader AP to coordinate, and can be configured to run at a scheduled interval. It does not require a dedicated hardware controller (it runs on the WLC) and does not automatically enable client load balancing (that is a separate feature).
What should I do if I get this 350-401 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-401 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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