WLAN Design Flashcards
7 cards from real ACMA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 WLAN Design flashcards as text
What is the recommended minimum Received Signal Strength Indicator (RSSI) for a voice over WLAN deployment?
Answer: -67 dBm
-67 dBm is the generally accepted minimum RSSI for voice-grade WLAN performance to ensure reliable roaming and call quality.
In an Aruba network, what does the term 'cell breathing' refer to in WLAN design?
Answer: Reducing AP transmit power to shrink coverage cells and reduce co-channel interference
Cell breathing refers to reducing AP transmit power to create smaller, non-overlapping coverage cells that minimize co-channel interference.
Which deployment model is recommended when APs must be installed in locations without Ethernet cabling?
Answer: Mesh APs using wireless backhaul
Mesh APs use a wireless backhaul link to connect to the network where Ethernet cabling is unavailable or impractical.
A university wants to support 150 concurrent users per AP in a lecture hall. Which design approach best addresses this high-density scenario?
Answer: Deploy multiple APs with reduced transmit power and use 802.11ac/ax MU-MIMO
High-density venues require multiple APs with lower power and technologies like MU-MIMO to serve many simultaneous clients efficiently.
What is the primary advantage of using 80 MHz channel width in 802.11ac compared to 40 MHz?
Answer: Higher throughput due to more available spectrum
80 MHz channel width doubles the available spectrum compared to 40 MHz, enabling significantly higher throughput in 802.11ac.
During a post-deployment site survey, a technician notices dead zones near elevator shafts. What is the most likely cause?
Answer: Metal elevator shafts cause significant RF signal attenuation
Metal elevator shafts are highly effective RF shields, absorbing and blocking Wi-Fi signals and creating coverage dead zones nearby.
In Aruba's ARM feature, what happens when an AP detects high interference on its current channel?
Answer: ARM automatically switches the AP to a less congested channel
Aruba's ARM dynamically reassigns channels when interference is detected, automatically moving APs to cleaner spectrum.