ACMA WLAN Design 4

Question 1

What is the significance of the 'overlap' percentage between adjacent AP coverage areas in WLAN design?

Accepted Answer

10–15% overlap ensures seamless roaming without excessive interference

Answer

A 10–15% overlap between adjacent cells ensures clients can roam seamlessly while minimizing co-channel interference.

Question 2

A warehouse deployment requires APs to cover very long aisles between metal shelving. Which antenna configuration is most effective?

Accepted Answer

Directional patch antennas mounted at aisle ends pointing down each aisle

Answer

Directional patch antennas aimed down aisles focus RF energy where it's needed and reduce interference between parallel aisles.

Question 3

Which 802.11 amendment introduced the concept of BSS Coloring to reduce co-channel interference in dense deployments?

Accepted Answer

802.11ax (Wi-Fi 6)

Answer

802.11ax (Wi-Fi 6) introduced BSS Coloring, which allows devices to differentiate between overlapping BSSs and reduce unnecessary deferrals.

Question 4

What is the purpose of conducting a passive site survey versus an active site survey?

Accepted Answer

Passive surveys listen to existing RF environment; active surveys use a test AP to measure coverage

Answer

Passive surveys capture existing RF signals and interference without transmitting, while active surveys use a test AP to measure coverage and performance.

Question 5

In a high-density stadium deployment, why are APs typically mounted under seats rather than on the ceiling?

Accepted Answer

Under-seat mounting provides shorter range and better per-user capacity

Answer

Under-seat AP placement reduces cell size and focuses coverage on individual seating areas, dramatically improving per-user capacity in dense crowds.

(ACMA) Aruba Certified Mobility Associate Practice Test

(ACMA) Aruba Certified Mobility Associate Practice Test

ACMA WLAN Design 4