A field engineer is reviewing wireless site survey findings for a newly commissioned offic… — CompTIA Network+

A field engineer is reviewing wireless site survey findings for a newly commissioned office space. The survey report reveals high frame corruption rates caused by adjacent channel interference in the $2.4\text{ GHz}$ spectrum. Upon inspecting the wireless LAN controller, the engineer notices that three neighboring access points are currently configured to operate on channels $1$ , $3$ , and $5$ with a $20\text{ MHz}$ channel width. Which channel reassignment scheme should the engineer implement to eliminate adjacent channel overlap?

Reassign the access points to channels $1$ , $6$ , and $11$ .Cevap
B
Reassign the access points to channels $2$ , $4$ , and $6$ .
C
Reassign the access points to channels $1$ , $5$ , and $9$ .
D
Enable $40\text{ MHz}$ channel bonding across channels $1$ and $5$ .

Cevap

Reassign the access points to channels

1

6

, and

11

In the

2.4\text{ GHz}

wireless spectrum, each channel operates with a

20\text{ MHz}

width (with a

22\text{ MHz}

signal mask) and center frequencies are spaced only

5\text{ MHz}

apart. Therefore, channels must be separated by at least 5 channel increments to avoid spectral overlap. Channels 1, 6, and 11 are the three standard non-overlapping

20\text{ MHz}

channels in North America.

Adım Adım Çözüm

Identify the operating frequency band and channel width.

The deployment uses the

2.4\text{ GHz}

band with

20\text{ MHz}

wide channels.

Understanding the band characteristics dictates how channels overlap.

Calculate required channel separation to prevent overlap.

Each

20\text{ MHz}

channel occupies

22\text{ MHz}

of spectral width (

11\text{ MHz}

above and below the center frequency), requiring at least

5

channel numbers of separation.

Channels closer than 5 channel numbers apart share overlapping frequency bounds.

Select the standard non-overlapping channels for the region.

Channels

1

6

, and

11

provide

25\text{ MHz}

spacing between center frequencies, fully isolating each cell.

Using channels 1, 6, and 11 avoids adjacent channel interference entirely.

Anahtar Kavram

2.4 GHz Non-Overlapping Channels

Tahmini Süre:1m 0s

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

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Konular

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