CWS WLAN Hardware and Antennas Flashcards
7 cards from real CWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CWS WLAN Hardware and Antennas flashcards as text
What is the primary advantage of a distributed antenna system (DAS) in large venues?
Answer: Even signal distribution using many low-power antennas to eliminate dead zones
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.
Which 802.11 Wi-Fi 6 feature allows an AP to schedule client transmissions to reduce contention in dense environments?
Answer: OFDMA (Orthogonal Frequency Division Multiple Access)
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.
What is the purpose of antenna beamforming in modern WLAN systems?
Answer: To focus transmitted energy toward a specific client using phase manipulation
Beamforming uses signal phase adjustments across multiple antenna elements to constructively focus energy toward a targeted client, improving signal strength and reducing interference.
A -70 dBm received signal level at a wireless client is generally considered to be:
Answer: Good signal, suitable for most applications
-70 dBm is generally considered a good received signal level, adequate for most WLAN applications though not as strong as -50 to -60 dBm.
What is the function of the RF spectrum analyzer in WLAN site surveys?
Answer: To identify non-802.11 interference sources such as microwaves and Bluetooth devices
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.
What is the recommended minimum overlap between adjacent access point coverage cells in an enterprise WLAN for seamless roaming?
Answer: 15-20%
A 15-20% cell overlap ensures that roaming clients maintain a usable signal from the new AP before completely losing signal from the old one, enabling seamless handoff.
Which wireless hardware component is responsible for converting digital data into radio frequency signals for transmission?
Answer: RF transceiver (radio)
The RF transceiver (radio) in an access point performs the digital-to-analog conversion and modulates data onto the carrier frequency for transmission over the air.