Reducing Channel Overlap in AP-on-a-Stick Surveys
An engineer is performing an AP-on-a-stick survey and finds that the 5 GHz channel overlap is too high when an appropriate number of APs are used for the density requirements. Which two actions during the survey reduce channel overlap? (Choose two.)
Community Votes
100% of anonymous learners picked answer CD. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
Tests knowledge of spectrum availability and antenna directivity; the trap is confusing client-side power saving with network interference mitigation.
Learn how to minimize 5 GHz channel overlap during density surveys using UNII-2e channels and directional antennas. This guide explains why these options are correct for CCNA 300-425.
Many learners select A or B, thinking higher data rates or power reduce overlap, but these actually increase cell size or do not address spectral contention.
Community Discussion (4 comments)
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Expert Analysis
Why the Answer Is Correct
The correct actions are C and D. Enabling UNII-2e channels (Option C) expands the available non-overlapping spectrum in the 5 GHz band, directly reducing overlap when AP density is high. Using directional antennas (Option D) confines the RF coverage area, preventing signals from interfering with neighboring cells on the same channel.Why the Other Options Are Wrong
Raising minimum data rates (A) reduces cell size but does not solve spectral overlap issues and can degrade performance at the edge. Increasing transmit power (B) expands coverage, worsening overlap and interference. Power saving mode (E) is a client-side feature and has no impact on RF channel planning or overlap.Community Comment Notes
Community consensus strongly supports C and D. User crabb63 notes that power save mode disconnects clients, making it irrelevant for survey design. Farhad123 confirms that power save is a client choice and doesn't affect channel overlap, validating the exclusion of E. Another user points out that raising min data rate reduces cell size but isn't the primary solution for overlap compared to spectrum/antenna changes.Official Reference
Exam Strategy
When dealing with channel overlap in dense deployments, prioritize expanding available spectrum (more channels) and spatial isolation (directional antennas). Avoid options that only affect signal strength or client behavior.
Frequently Asked Questions
Why doesn't raising min data rate fix channel overlap?
It shrinks cell size but doesn't add spectrum or isolate cells, so overlap remains if channels are reused.
Does power saving mode help with RF interference?
No, it's a client-side battery-saving feature and has no effect on AP channel planning or interference.