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Difficulty: EasyWireless Principles and Architecture

When designing an enterprise Wi-Fi deployment, a network technician must decide between utilizing the 2.4 GHz and 5 GHz radio frequency bands. Which characteristic represents an advantage of using the 2.4 GHz band compared to the 5 GHz band?

  1. Longer propagation distance and superior signal penetration through physical barriersAnswer
  2. B
    A significantly larger pool of non-overlapping channels to eliminate co-channel interference
  3. C
    Higher overall data throughput capacity resulting from standard wider channel bonding
  4. D
    Lower susceptibility to interference caused by common household and industrial devices

Answer

The 2.4 GHz band provides longer propagation distance and superior signal penetration through physical barriers.
Lower frequency radio waves (2.4 GHz) have longer wavelengths. This physical property allows 2.4 GHz wireless signals to cover greater distances and pass through solid obstructions (such as drywall, wood, and concrete) with less signal loss compared to higher frequency 5 GHz waves.

Step-by-Step Solution

1
Analyze RF wave propagation characteristics
Lower RF frequencies have longer wavelengths, which travel further and experience less attenuation through solid objects.
RF physics dictates an inverse relationship between frequency and wave propagation distance.
2
Compare 2.4 GHz and 5 GHz characteristics
2.4 GHz signals travel longer distances and penetrate walls better, while 5 GHz signals provide higher speed over shorter distances.
Lower frequency (2.4 GHz) trades raw speed and channel availability for increased coverage area.

Key Concept

Wireless Frequency Bands and RF Propagation Characteristics
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Topics

Wireless Principles and Architecture

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