An IT technician is auditing a wireless network setup in an enterprise office operating on… — CompTIA Network+

An IT technician is auditing a wireless network setup in an enterprise office operating on the $2.4\text{ GHz}$ band. Users report frequent packet loss and degraded network performance. The audit reveals that adjacent wireless access points are currently assigned to channels 1, 3, 5, and 7. Which channel re-assignment strategy should the technician implement to eliminate adjacent-channel interference (ACI)?

Reconfigure the access points to use non-overlapping channels 1, 6, and 11.Answer
B
Reconfigure the access points to use channels 2, 4, 6, and 8 to evenly space out the frequency ranges.
C
Enable 40 MHz channel bonding on all access points to override overlapping channel frequencies.
D
Increase the transmit power on channels 3 and 5 to overpower interference from channels 1 and 7.

Answer

Reconfigure the access points to use non-overlapping channels 1, 6, and 11.

In 802.11 wireless deployment on the

2.4\text{ GHz}

band, each channel spans

22\text{ MHz}

while channel center frequencies are spaced

5\text{ MHz}

apart. To prevent adjacent-channel interference (ACI), access points must be configured using channels that do not share frequency space. Channels 1, 6, and 11 are the standard non-overlapping channels that eliminate spectral overlap.

Step-by-Step Solution

Analyze the frequency structure of the 2.4 GHz Wi-Fi spectrum.

Each 2.4 GHz channel has a bandwidth of

22\text{ MHz}

, but channels are spaced only

5\text{ MHz}

apart.

Channels closer than 5 channel numbers apart (such as 1, 3, 5, 7) overlap significantly in frequency, creating adjacent-channel interference (ACI).

Identify the standard non-overlapping channel scheme for 2.4 GHz wireless deployments.

Channels 1, 6, and 11 have center frequencies of

2412\text{ MHz}

2437\text{ MHz}

, and

2462\text{ MHz}

, providing sufficient separation so their frequency envelopes do not collide.

Using 1, 6, and 11 ensures zero spectral overlap between neighboring access points.

Select the correct deployment reconfiguration.

Assigning channels 1, 6, and 11 across adjacent access points eliminates adjacent-channel interference.

This reconfiguration adheres to standard 802.11 wireless deployment practices for the 2.4 GHz band.

Key Concept

2.4 GHz Non-Overlapping Channel Assignment

Estimated Time:1m 15s

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