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350-401 Practice Question: Which three statements about RRM (Radio Resource…
Which three statements about RRM (Radio Resource Management) in a Cisco wireless LAN are true? (Choose three.)
⚠ Common exam trap
The trap is conflating RRM with client load balancing or assuming RRM needs dedicated hardware — candidates pick 'load balancing' because it sounds RF-related, but RRM is strictly about channel, power, and measurement coordination.
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.
Option A is correct because RRM's Dynamic Channel Assignment (DCA) continuously monitors each AP's RF environment—using metrics like noise, interference, and neighboring AP beacons—and automatically assigns the least-interfered channel to each radio. Option C is correct because RRM's Transmit Power Control (TPC) algorithm adjusts each AP's radio transmit power to balance coverage and capacity, shrinking cells to reduce co-channel interference while maintaining adequate signal for clients. Option D is correct because RRM organizes APs into RF groups, and within each group a single AP is elected as the RF group leader; that leader aggregates the neighbor and interference data (via NMSP/CCX measurements) and computes channel and power plans that are distributed to all members. Option B is not correct because RRM is a software feature of the WLC (and, in newer architectures, of Catalyst 9800 controllers or embedded wireless in Catalyst 9000 switches)—no dedicated hardware appliance is required. Option E is not correct because client load balancing is a separate feature (Aggressive Load Balancing / band steering) and is not part of RRM's DCA/TPC/RF-group functions.
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
RRM's dynamic channel assignment continuously scans RF conditions and assigns each AP the channel with least interference, avoiding manual planning. This satisfies the automatic channel-selection claim, distinguishing it from static channel plans configured per access point.
- ✗
RRM requires a dedicated hardware controller to perform RF calculations.
Why it's wrong here
RRM calculations run on the WLC itself, or on the 9800's embedded controller, not dedicated hardware. It is tempting because early autonomous AP deployments needed external management, but RRM is a controller-integrated feature requiring no separate appliance.
- ✓
RRM can adjust the transmit power of APs to optimize coverage and reduce co-channel interference.
Why this is correct
RRM's transmit power control (TPC) algorithm dynamically lowers AP power to shrink oversized cells, cutting co-channel interference, while raising it to close coverage gaps. This directly satisfies the stem's requirement by balancing coverage against interference across neighbouring APs on the same channel.
- ✓
RRM uses a leader AP to collect and distribute RF measurements to other APs in the same RF group.
Why this is correct
Within an RF group, RRM elects one controller as the RF group leader, which aggregates neighbour AP radio measurements and runs the transmit power and channel algorithms, then distributes the resulting configuration back to member APs. This satisfies the requirement that a leader AP collects and distributes RF measurements.
- ✗
RRM automatically enables client load balancing across APs in the same coverage area.
Why it's wrong here
RRM's coverage hole detection, dynamic channel and transmit power assignment do not include client load balancing; that is a separate feature configured via the controller's load-balancing settings. It is tempting because RRM does manage radio resources across APs, so balancing clients sounds adjacent, but the mechanism is distinct.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 350-401 practice question is part of Courseiva's free Cisco 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 350-401 exam.