ACMA WLAN Design 5 — Questions and Answers
Question 1: A coffee shop wants to offer free guest Wi-Fi while keeping business traffic separate. Which WLAN design element achieves this?
- Deploy two separate physical networks with different ISPs
- Use multiple SSIDs mapped to separate VLANs for guest and corporate traffic (Correct answer)
- Configure all devices on the same SSID with user-based firewall rules only
- Disable the 5 GHz radio for guest users and use 2.4 GHz only
Correct answer: Use multiple SSIDs mapped to separate VLANs for guest and corporate traffic
Multiple SSIDs mapped to separate VLANs allow traffic segmentation between guest and corporate networks on shared AP infrastructure.
Question 2: What is the impact of enabling too many SSIDs on a single AP in a WLAN design?
- More SSIDs increase available bandwidth for all clients
- Each SSID consumes air time for beacons, reducing overall network efficiency (Correct answer)
- SSIDs beyond four are automatically disabled by the AP
- More SSIDs improve roaming performance between APs
Correct answer: Each SSID consumes air time for beacons, reducing overall network efficiency
Each SSID requires periodic beacon transmissions that consume airtime, so excessive SSIDs reduce overall network efficiency and client throughput.
Question 3: In Aruba WLAN design, what is the role of 802.11k neighbor reports?
- To force clients to disconnect from weak APs
- To provide clients with a list of nearby APs to assist in roaming decisions (Correct answer)
- To configure transmit power levels on neighboring APs
- To block clients from connecting to unauthorized APs
Correct answer: To provide clients with a list of nearby APs to assist in roaming decisions
802.11k allows APs to provide clients with neighbor AP information, enabling smarter and faster roaming decisions.
Question 4: A client device is stuck on a distant, weak AP despite a closer AP being available. Which Aruba feature addresses this 'sticky client' problem?
- DFS (Dynamic Frequency Selection)
- ARM's Client Match feature (Correct answer)
- Fast Roaming with 802.11r
- Band steering via 802.11k
Correct answer: ARM's Client Match feature
Aruba's Client Match actively steers clients away from overloaded or weak APs to better alternatives, resolving the sticky client problem.
Question 5: When designing a WLAN for a medical facility, which frequency band should be preferred and why?
- 2.4 GHz, because medical devices only operate on 2.4 GHz
- 5 GHz, because it offers more non-overlapping channels and less interference from medical equipment (Correct answer)
- 6 GHz only, because it is required by HIPAA regulations
- Both bands equally, as medical facilities have no special RF requirements
Correct answer: 5 GHz, because it offers more non-overlapping channels and less interference from medical equipment
5 GHz is preferred in medical environments because it offers more non-overlapping channels and is less likely to be congested by medical devices that often use 2.4 GHz.
Question 6: What is the primary reason to conduct a post-deployment validation survey after AP installation?
- To register the APs with the vendor for warranty purposes
- To verify actual coverage, signal strength, and throughput meet design requirements (Correct answer)
- To document the AP serial numbers for asset tracking
- To update the AP firmware to the latest version
Correct answer: To verify actual coverage, signal strength, and throughput meet design requirements
Post-deployment surveys confirm that real-world coverage and performance match the design specifications and identify any gaps or problem areas.
Question 7: Which Aruba solution provides centralized RF management and automatic channel and power adjustments across all APs?
- Aruba Central Policy Manager
- Aruba Adaptive Radio Management (ARM) (Correct answer)
- Aruba ClearPass
- Aruba AirWave
Correct answer: Aruba Adaptive Radio Management (ARM)
Aruba ARM continuously monitors the RF environment and automatically adjusts channel assignments and transmit power to optimize network performance.
ACMA WLAN Design 5
A coffee shop wants to offer free guest Wi-Fi while keeping business traffic separate.
Which WLAN design element achieves this?