ACMA RF Principles 2

Question 1

What is the primary cause of multipath interference in a wireless network?

Accepted Answer

RF signals reflecting off surfaces and arriving at the receiver at different times

Answer

Multipath occurs when RF signals reflect off walls, floors, and objects, causing multiple copies of the same signal to arrive at slightly different times.

Question 2

Which antenna type radiates power equally in all horizontal directions, making it suitable for open-office deployments?

Accepted Answer

Omnidirectional antenna

Answer

An omnidirectional antenna radiates power equally in a 360-degree horizontal pattern, ideal for providing coverage in all directions from a single point.

Question 3

What does EIRP stand for in the context of wireless networking?

Accepted Answer

Effective Isotropic Radiated Power

Answer

EIRP (Effective Isotropic Radiated Power) is the total power radiated by an antenna system, combining transmit power and antenna gain.

Question 4

What RF phenomenon causes signal strength to decrease as distance from the transmitter increases?

Accepted Answer

Free-space path loss

Answer

Free-space path loss is the natural attenuation of an RF signal as it travels through open space, increasing with both distance and frequency.

Question 5

Which of the following best describes antenna gain?

Accepted Answer

The increase in signal strength achieved by focusing RF energy in a specific direction

Answer

Antenna gain describes how much an antenna focuses RF energy in a particular direction compared to an isotropic radiator, measured in dBi.

(ACMA) Aruba Certified Mobility Associate Practice Test

(ACMA) Aruba Certified Mobility Associate Practice Test

ACMA RF Principles 2