ACMA Mobility Architecture & Infrastructure 5 — Questions and Answers
Question 1: What happens to the Virtual Controller role in an Aruba Instant cluster if the current VC becomes unreachable?
- All APs revert to standalone autonomous mode
- A new VC is elected from the remaining APs automatically (Correct answer)
- The cluster shuts down until the VC recovers
- APs connect to the nearest Mobility Controller as fallback
Correct answer: A new VC is elected from the remaining APs automatically
Aruba Instant APs automatically elect a new Virtual Controller from remaining members, ensuring cluster continuity with no manual intervention.
Question 2: In Aruba's architecture, what is the primary difference between an 'Air Monitor' and a standard access AP?
- Air Monitors serve clients while scanning; standard APs only scan
- Air Monitors are dedicated to WIDS/WIPS scanning and do not serve clients (Correct answer)
- Air Monitors use 802.11ac while standard APs use 802.11n
- Air Monitors require a separate license for each channel scanned
Correct answer: Air Monitors are dedicated to WIDS/WIPS scanning and do not serve clients
Air Monitors are APs configured exclusively for wireless intrusion detection/prevention scanning and cannot simultaneously serve client traffic.
Question 3: Which Aruba feature allows controllers to be deployed as virtual machines rather than physical appliances?
- Aruba Instant Virtual
- VMC (Virtual Mobility Controller) (Correct answer)
- Aruba Central Cloud Gateway
- AirWave Virtual
Correct answer: VMC (Virtual Mobility Controller)
Aruba's VMC is a software-based Mobility Controller that runs on standard hypervisors (VMware, KVM), providing full controller functionality without dedicated hardware.
Question 4: What is the role of 'AP groups' in Aruba Mobility Controller configuration?
- Physically group APs in the same building for power management
- Apply a common set of configuration profiles to multiple APs simultaneously (Correct answer)
- Limit the number of APs that can associate to one controller
- Define RF neighbor relationships between APs
Correct answer: Apply a common set of configuration profiles to multiple APs simultaneously
AP groups allow administrators to assign shared configuration profiles (Virtual APs, RF, SSID settings) to sets of APs without configuring each individually.
Question 5: In Aruba Mobility Master architecture, which component actually terminates CAPWAP tunnels from APs?
- Mobility Master
- Managed Device (MD) (Correct answer)
- ClearPass
- AirWave
Correct answer: Managed Device (MD)
Managed Devices (formerly Local Controllers) terminate CAPWAP tunnels and handle data plane forwarding, while Mobility Master handles management plane functions.
Question 6: When deploying Aruba APs in a mesh topology, which AP acts as the entry point connecting the mesh to the wired network?
- Mesh Point
- Mesh Portal (Correct answer)
- Root AP
- Uplink AP
Correct answer: Mesh Portal
The Mesh Portal is the AP with a wired uplink that connects the wireless mesh network to the wired infrastructure and serves as the root of the mesh tree.
Question 7: Which Aruba licensing model ties licenses to the Mobility Master rather than individual controllers, enabling flexible capacity allocation?
- Per-AP perpetual licensing on each controller
- Centralized pool licensing via Mobility Master (Correct answer)
- Subscription-based per-SSID licensing
- RADIUS-issued dynamic licensing
Correct answer: Centralized pool licensing via Mobility Master
Mobility Master hosts a centralized license pool that Managed Devices draw from dynamically, removing the need to assign fixed AP counts to each controller.
ACMA Mobility Architecture & Infrastructure 5
What happens to the Virtual Controller role in an Aruba Instant cluster if the current VC becomes unreachable?