A network engineer is designing a wireless deployment for a high-density corporate auditor… — CompTIA Network+

A network engineer is designing a wireless deployment for a high-density corporate auditorium intended to support up to 500 active user devices simultaneously. Initial deployment testing reveals severe co-channel interference (CCI) and degraded throughput despite strong signal coverage throughout the room. Which TWO configuration changes should the engineer implement to mitigate CCI and optimize performance in this high-density environment?

Reduce the radio transmit power ( $Tx$ power) on the access points to shrink individual cell sizes.Cevap
Disable legacy low data rates (such as $1\text{ Mbps}$ and $2\text{ Mbps}$ ) to decrease management frame overhead and airtime utilization.Cevap
C
Increase the channel bonding width from $20\text{ MHz}$ to $80\text{ MHz}$ across all $2.4\text{ GHz}$ and $5\text{ GHz}$ access points.
D
Assign adjacent access points to overlapping $2.4\text{ GHz}$ channels such as channels 2, 4, and 8 to spread out frequency usage.
E
Set omnidirectional antenna gain to maximum power on all access points to maximize coverage reach.

Cevap

The two correct configuration changes are reducing radio transmit power on access points to shrink cell sizes and disabling low legacy data rates to minimize management frame overhead.

In high-density wireless deployments, optimizing performance requires mitigating co-channel interference (CCI) and maximizing airtime efficiency. Reducing access point transmit power shrinks coverage cell radii so adjacent access points operating on the same channel do not overlap or interfere. Additionally, disabling slow legacy data rates (such as

1\text{ Mbps}

2\text{ Mbps}

) reduces management frame overhead transmitted at low data rates and forces client devices to disconnect and roam to closer access points when signal quality degrades.

Adım Adım Çözüm

Analyze the high-density deployment problem

Identified co-channel interference (CCI) and high airtime utilization as primary root causes of performance degradation.

When many APs operate in close proximity, large cell footprints cause APs on the same channel to hear each other and contend for airtime.

Evaluate cell sizing strategies

Lowering

Tx

power shrinks RF cell boundaries.

Smaller cell footprints allow frequency reuse without RF overlap between access points on identical channels.

Evaluate airtime efficiency measures

Disabling legacy data rates (

1\text{ Mbps}

2\text{ Mbps}

5.5\text{ Mbps}

) forces higher data rate modulations.

Management frames (beacons, probe responses) transmitted at basic rates consume significant medium time; disabling slow rates frees up channel capacity.

Anahtar Kavram

High-density wireless network optimization requires reducing AP cell size via transmit power tuning and disabling legacy basic data rates to control co-channel interference and airtime contention.

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