ACP Fundamentals & Core Principles 3 — Questions and Answers
Question 1: Which Aruba switching architecture allows multiple switches to be managed as a single logical unit using VSX?
- Stacking via proprietary backplane
- Virtual Switching Extension creating an active-active pair (Correct answer)
- Spanning Tree-based ring topology
- OSPF equal-cost multipath
Correct answer: Virtual Switching Extension creating an active-active pair
VSX (Virtual Switching Extension) pairs two switches to operate as an active-active redundant system while maintaining independent control planes.
Question 2: In Aruba's PPSK (Private Pre-Shared Key) implementation, what is the key differentiator from standard WPA2-Personal?
- Each user or device gets a unique passphrase mapped to a specific role (Correct answer)
- PPSK uses 256-bit AES instead of 128-bit
- PPSK requires a RADIUS server for every association
- PPSK disables the 4-way handshake
Correct answer: Each user or device gets a unique passphrase mapped to a specific role
PPSK assigns individual passphrases per user or device, allowing unique policy enforcement without deploying 802.1X infrastructure.
Question 3: What does 802.11r (Fast BSS Transition) improve in a wireless environment?
- Maximum data throughput on 5 GHz band
- Roaming speed between APs by pre-authenticating before disassociation (Correct answer)
- MIMO spatial stream negotiation
- WPA3 key derivation time
Correct answer: Roaming speed between APs by pre-authenticating before disassociation
802.11r reduces roaming latency by allowing a client to pre-establish keys with the target AP before leaving the current AP.
Question 4: Which component of Aruba ClearPass is responsible for profiling and identifying device types on the network?
- ClearPass Guest
- ClearPass OnGuard
- ClearPass Access Tracker
- ClearPass Device Insight / Profiling Engine (Correct answer)
Correct answer: ClearPass Device Insight / Profiling Engine
ClearPass's profiling engine fingerprints devices using DHCP, HTTP, and SNMP data to categorize endpoint types automatically.
Question 5: In an Aruba Instant deployment, which AP automatically assumes the role of Virtual Controller (VC)?
- The AP with the highest IP address
- The AP with the highest MAC address that wins the election (Correct answer)
- The first AP powered on in the cluster
- The AP designated manually via the console only
Correct answer: The AP with the highest MAC address that wins the election
Aruba Instant APs elect a Virtual Controller using a MAC-address-based election process; the AP with the highest MAC wins by default.
Question 6: What is the function of Aruba's AppRF technology?
- Automatically selects the best RF band per client
- Provides Layer 7 application visibility and policy enforcement (Correct answer)
- Compresses application data before transmission
- Manages RF spectrum licensing compliance
Correct answer: Provides Layer 7 application visibility and policy enforcement
AppRF uses deep packet inspection to identify applications and enforce QoS or access policies at Layer 7.
Question 7: Which protocol does Aruba use for controller-to-AP communication in a tunneled WLAN deployment?
- LWAPP (Lightweight Access Point Protocol)
- CAPWAP (Control and Provisioning of Wireless Access Points) (Correct answer)
- GRE over IPsec
- VXLAN
Correct answer: CAPWAP (Control and Provisioning of Wireless Access Points)
Aruba uses CAPWAP to tunnel both control and data traffic between the Mobility Controller and managed APs.
ACP Fundamentals & Core Principles 3
Which Aruba switching architecture allows multiple switches to be managed as a single logical unit using VSX?