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Zorluk: ZorWireless Networking Standards and Technologies

A field technician is deploying a third wireless access point (AP3) to extend coverage across a warehouse floor. Existing access points AP1 and AP2 are operating on 2.4 GHz Channel 1 and Channel 6, respectively, both using 20 MHz channel widths. To eliminate adjacent-channel interference while ensuring maximum stability for legacy and modern 2.4 GHz wireless clients, which channel number and channel width configuration must be applied to AP3?

  1. Channel 11 with a 20 MHz channel widthCevap
  2. B
    Channel 11 with a 40 MHz channel width
  3. C
    Channel 3 with a 20 MHz channel width
  4. D
    Channel 6 with a 40 MHz channel width

Cevap

Channel 11 with a 20 MHz channel width
In the 2.4 GHz Wi-Fi spectrum, channels 1, 6, and 11 are the only three 20 MHz channels that do not overlap with one another. Since AP1 is on Channel 1 and AP2 is on Channel 6, assigning AP3 to Channel 11 with a 20 MHz width ensures that all three access points operate without adjacent-channel interference.

Adım Adım Çözüm

1
Identify the non-overlapping channel scheme for the 2.4 GHz band.
The three non-overlapping 20 MHz channels in the 2.4 GHz ISM band are Channels 1, 6, and 11.
Each standard 802.11 channel occupies 22 MHz of spectral width, so channels must be spaced 5 channels apart (25 MHz center-frequency separation) to avoid frequency overlap.
2
Determine the remaining available non-overlapping channel for AP3.
Since AP1 uses Channel 1 and AP2 uses Channel 6, AP3 must be assigned to Channel 11.
Selecting Channel 11 completes the non-overlapping cellular deployment pattern.
3
Evaluate the channel width setting.
A 20 MHz channel width must be retained.
Enabling 40 MHz channel bonding in 2.4 GHz expands frequency utilization across adjacent channels, violating the non-overlapping design and causing co-channel interference.

Anahtar Kavram

2.4 GHz Non-Overlapping Channels and Channel Width Constraints
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Konular

Wireless Networking Standards and Technologies

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