ACMA WLAN Design 3

Question 1

What is the recommended minimum Received Signal Strength Indicator (RSSI) for a voice over WLAN deployment?

Accepted Answer

-67 dBm

Answer

-67 dBm is the generally accepted minimum RSSI for voice-grade WLAN performance to ensure reliable roaming and call quality.

Question 2

In an Aruba network, what does the term 'cell breathing' refer to in WLAN design?

Accepted Answer

Reducing AP transmit power to shrink coverage cells and reduce co-channel interference

Answer

Cell breathing refers to reducing AP transmit power to create smaller, non-overlapping coverage cells that minimize co-channel interference.

Question 3

Which deployment model is recommended when APs must be installed in locations without Ethernet cabling?

Accepted Answer

Mesh APs using wireless backhaul

Answer

Mesh APs use a wireless backhaul link to connect to the network where Ethernet cabling is unavailable or impractical.

Question 4

A university wants to support 150 concurrent users per AP in a lecture hall. Which design approach best addresses this high-density scenario?

Accepted Answer

Deploy multiple APs with reduced transmit power and use 802.11ac/ax MU-MIMO

Answer

High-density venues require multiple APs with lower power and technologies like MU-MIMO to serve many simultaneous clients efficiently.

Question 5

What is the primary advantage of using 80 MHz channel width in 802.11ac compared to 40 MHz?

Accepted Answer

Higher throughput due to more available spectrum

Answer

80 MHz channel width doubles the available spectrum compared to 40 MHz, enabling significantly higher throughput in 802.11ac.

(ACMA) Aruba Certified Mobility Associate Practice Test