CWS CWS WLAN Hardware and Antennas 5

Question 1

What is the primary advantage of a distributed antenna system (DAS) in large venues?

Accepted Answer

Even signal distribution using many low-power antennas to eliminate dead zones

Answer

DAS uses many small, low-power antennas distributed throughout a space to provide consistent coverage without the dead zones created by fewer high-power antennas.

Question 2

Which 802.11 Wi-Fi 6 feature allows an AP to schedule client transmissions to reduce contention in dense environments?

Accepted Answer

OFDMA (Orthogonal Frequency Division Multiple Access)

Answer

OFDMA divides channels into smaller resource units (RUs) and allows the AP to schedule multiple clients simultaneously on different sub-carriers, improving efficiency in dense deployments.

Question 3

What is the purpose of antenna beamforming in modern WLAN systems?

Accepted Answer

To focus transmitted energy toward a specific client using phase manipulation

Answer

Beamforming uses signal phase adjustments across multiple antenna elements to constructively focus energy toward a targeted client, improving signal strength and reducing interference.

Question 4

A -70 dBm received signal level at a wireless client is generally considered to be:

Accepted Answer

Good signal, suitable for most applications

Answer

-70 dBm is generally considered a good received signal level, adequate for most WLAN applications though not as strong as -50 to -60 dBm.

Question 5

What is the function of the RF spectrum analyzer in WLAN site surveys?

Accepted Answer

To identify non-802.11 interference sources such as microwaves and Bluetooth devices

Answer

An RF spectrum analyzer displays all RF energy across a frequency band, allowing technicians to identify interference from non-Wi-Fi sources that standard Wi-Fi tools cannot detect.

CWS Exam Practice Test

CWS Exam Practice Test

CWS CWS WLAN Hardware and Antennas 5