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N10-005 · Question #361

A company wants to ensure that a wireless signal from their WAP only sends down one specific corridor. Which of the following can be done to achieve this?

The correct answer is D. Change the antennas. Replacing an omnidirectional antenna with a directional antenna on a WAP focuses the RF signal into a specific direction, such as down a single corridor.

Network implementation

Question

A company wants to ensure that a wireless signal from their WAP only sends down one specific corridor. Which of the following can be done to achieve this?

Options

  • ADisable the SSID.
  • BChange the broadcast channel.
  • CLower the signal strength.
  • DChange the antennas.

How the community answered

(33 responses)
  • A
    3% (1)
  • B
    3% (1)
  • D
    94% (31)

Why each option

Replacing an omnidirectional antenna with a directional antenna on a WAP focuses the RF signal into a specific direction, such as down a single corridor.

ADisable the SSID.

Disabling the SSID hides the network name from broadcast beacon frames but has no effect on the physical radiation pattern or direction of the RF signal.

BChange the broadcast channel.

Changing the broadcast channel affects which frequency is used and reduces co-channel interference, but does not alter the directionality of the antenna's radiation pattern.

CLower the signal strength.

Lowering signal strength reduces the overall range of the signal in all directions equally but does not focus or direct the signal down a specific path.

DChange the antennas.Correct

Wireless antennas determine the radiation pattern of the RF signal. Omnidirectional antennas radiate signal in all directions equally, while directional antennas (such as Yagi or patch antennas) concentrate signal energy into a focused beam or sector. Changing to a directional antenna physically shapes the signal coverage to target only the desired corridor.

Concept tested: Directional antenna selection for wireless signal focusing

Source: https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/prod_white_paper09186a00801b5107.html

Topics

#directional antenna#wireless coverage#WAP#signal propagation

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