ACP Network Management and Troubleshooting 3 — Questions and Answers
Question 1: Which Aruba tool provides AI-driven anomaly detection and root-cause analysis for wireless performance degradation?
- Aruba NetEdit
- Aruba AIOps in Central (Correct answer)
- Aruba Orchestrator
- Aruba Policy Manager
Correct answer: Aruba AIOps in Central
Aruba AIOps (within Aruba Central) uses machine learning to detect network anomalies and provides root-cause analysis with remediation suggestions.
Question 2: A technician needs to verify that OSPF adjacencies are forming correctly on an Aruba switch. Which command provides this information?
- show ip ospf neighbor (Correct answer)
- show ip route ospf
- show ip ospf interface
- show running-config router ospf
Correct answer: show ip ospf neighbor
'show ip ospf neighbor' displays the state of all OSPF neighbor relationships including their current FSM state (e.g., FULL, 2WAY).
Question 3: In Aruba Instant (IAP) deployments, what happens to client connectivity if the Virtual Controller AP goes offline?
- All clients disconnect permanently until the VC is manually reassigned
- A new VC is automatically elected from remaining APs and clients reconnect (Correct answer)
- All APs revert to standalone mode with no SSID broadcasting
- Clients retain connectivity through a backup controller
Correct answer: A new VC is automatically elected from remaining APs and clients reconnect
Aruba Instant uses an automatic VC election process; when the current VC fails, the remaining APs elect a new VC within seconds and client services resume.
Question 4: Which syslog severity level should be configured to capture authentication failures without overwhelming storage with debug messages in Aruba OS?
- Level 7 (Debug)
- Level 3 (Error)
- Level 6 (Informational) (Correct answer)
- Level 5 (Notice)
Correct answer: Level 6 (Informational)
Syslog level 6 (Informational) captures authentication events and general operational messages without the volume overhead of Debug-level logging.
Question 5: A roaming client on an Aruba network experiences a 2-second interruption every time it moves between APs. Which feature, when enabled, would most reduce this roaming latency?
- Opportunistic Key Caching (OKC) / PMK caching (Correct answer)
- 802.11k neighbor reports
- Broadcast filter ARP
- UAPSD power save
Correct answer: Opportunistic Key Caching (OKC) / PMK caching
OKC (Opportunistic Key Caching) allows clients to reuse cached PMKs when roaming between APs on the same controller, eliminating the full 802.1X re-authentication delay.
Question 6: Which Aruba ClearPass profiling method uses DHCP fingerprinting to identify device types?
- OnGuard Agent
- SNMP trap receiver
- Network Access Device profiling via RADIUS
- Passive endpoint profiling through DHCP option snooping (Correct answer)
Correct answer: Passive endpoint profiling through DHCP option snooping
ClearPass passively analyzes DHCP option strings (fingerprints) forwarded from network devices to classify endpoints by OS and device type without agent installation.
Question 7: After upgrading Aruba controller firmware, several APs fail to rejoin and show 'cert-mismatch' in the AP debug log. What is the correct remediation?
- Factory reset all affected APs
- Re-provision the controller certificate and push updated AP whitelist (Correct answer)
- Downgrade the controller firmware to the previous version
- Delete and re-add the AP entries in the AP database
Correct answer: Re-provision the controller certificate and push updated AP whitelist
A cert-mismatch error indicates the AP cannot validate the controller's certificate; re-provisioning the controller's certificate and ensuring the AP whitelist is current resolves this.
ACP Network Management and Troubleshooting 3
Which Aruba tool provides AI-driven anomaly detection and root-cause analysis for wireless performance degradation?