2026 Valid HPE6-A90 Exam Updates - 2026 Study Guide
HPE6-A90 Certification - The Ultimate Guide [Updated 2026]
NEW QUESTION # 53
Which dashboard element provides an at-a-glance health score for a switch?
- A. Device health summary card.
- B. Topology map.
- C. Hardware card.
Answer: A
Explanation:
The device health summary card is specifically designed to provide an immediate, high-level overview of a switch's operational status. It aggregates various performance metrics-such as reachability, hardware status, and environmental conditions-into a simplified health score. This allows administrators to quickly assess the functional state of the hardware without needing to drill down into detailed logs or individual port statistics.
NEW QUESTION # 54
A retail stack must survive a member failure with minimal disruption. Which configuration in HPE Aruba Networking Central addresses this goal?
- A. Create a VRF per switch for redundancy
- B. A VSX stack with two or more members and MC-LAG
- C. VSF with proper member roles and link design
Answer: B
Explanation:
A VSX-based design with multiple members and MC-LAG provides high availability by maintaining independent control planes while ensuring active-active forwarding. This allows traffic to continue flowing with minimal disruption if one stack member fails, making it suitable for retail environments requiring resilient redundancy.
NEW QUESTION # 55
The security team requires certificate-based authentication for employees. Which security mode should be configured?
- A. WPA3-Personal
- B. WPA3-Enterprise
- C. WPA3 Transition with RadSec
Answer: B
Explanation:
WPA3-Enterprise is designed for environments requiring robust, individualized authentication by utilizing the Extensible Authentication Protocol (EAP) framework. This mode supports EAP-TLS, which is the industry standard for certificate-based authentication, ensuring that both the client and the network verify each other's identity through digital certificates rather than shared passwords.
NEW QUESTION # 56
You suspect DNS resolution failures of wireless clients. Which HPE Aruba Networking Central tool confirms name-resolution status from the AP?
- A. Check firmware compliance.
- B. Review event logs only.
- C. Run an NSLookup in the Troubleshoot panel.
Answer: C
Explanation:
The NSLookup tool, located within the Troubleshoot panel (or diagnostic tab), allows an administrator to initiate a DNS query directly from the Access Point. By testing name resolution from the AP's perspective, you can determine if the issue lies with the DNS server's responsiveness or the network path between the AP and the DNS provider. If the AP can resolve names while the client cannot, the issue is likely isolated to the client's configuration or the specific wireless segment; if the NSLookup fails from the AP as well, it confirms a broader infrastructure or reachability issue with the DNS service itself.
NEW QUESTION # 57
Which HPE Aruba Networking Central feature allows administrators to receive alerts and notifications about network issues?
- A. Alerts & Events Dashboard
- B. Device Inventory
- C. Audit Trail
Answer: A
Explanation:
The Alerts & Events Dashboard provides real-time visibility into network issues, alarms, and system-generated notifications. It helps administrators quickly identify and troubleshoot problems before they impact users.
NEW QUESTION # 58
A guest SSID requires captive portal access. Which setting enables this in HPE Aruba Networking Central?
- A. Apply Guest role to all users with ClearPass
- B. Configure captive portal under the WLAN profile
- C. Set security level to Guest under WLAN profile
Answer: B
Explanation:
Captive portal access for a guest SSID is enabled by configuring the captive portal settings within the WLAN profile in HPE Aruba Networking Central. This defines how users are redirected for authentication and how access is granted after successful login.
NEW QUESTION # 59
You need to interact with a remote device through a command-line interface. Which HPE Aruba Networking Central feature allows that?
- A. Remote Console service from the Troubleshoot page
- B. OOBM connection from the Troubleshoot page
- C. Template groups with multi-edit
Answer: A
Explanation:
The Remote Console service in the Troubleshoot page provides direct CLI access to managed devices, allowing administrators to execute commands and perform real-time diagnostics from HPE Aruba Networking Central.
NEW QUESTION # 60
Clients report brief outages overnight. Which dashboard element helps correlate events with time windows to identify root cause?
- A. Connectivity card with static neighbor count
- B. Events card filtered by time via the timeline widget
- C. Licenses card with subscription expiration date
Answer: B
Explanation:
The Events card combined with the timeline filter enables correlation of network events against specific time windows. This helps identify patterns such as brief outages and align them with system logs or environmental changes to determine root cause.
NEW QUESTION # 61
You're migrating branch sites to AOS10. Which design choice best supports unified policy and visibility with minimal local complexity?
- A. Gateways with tunnel mode forwarding
- B. Standalone APs with bridge mode forwarding
- C. Gateways with bridge mode forwarding
Answer: A
Explanation:
Gateway-based tunnel mode centralizes traffic forwarding through AOS-10 gateways, enabling consistent policy enforcement and unified visibility across branch sites. It reduces local configuration complexity while allowing centralized control of security and routing policies.
NEW QUESTION # 62
A campus has loops after adding a new distribution switch. Which HPE Aruba Networking Central feature should you configure to maintain a loop-free topology?
- A. BPDU guard configured on all switch ports
- B. MAC Authentication for switch uplinks
- C. Spanning Tree with appropriate port roles
Answer: C
Explanation:
Spanning Tree Protocol (STP) is the fundamental layer 2 mechanism used to prevent broadcast storms and network loops in a redundant topology. By assigning appropriate port roles-such as Root, Designated, and Blocked-STP ensures that there is only one active logical path between any two nodes on the network. When a new distribution switch is added, correctly configuring STP priorities and roles ensures that redundant physical links are intelligently managed, automatically disabling potential loop paths while maintaining network availability.
NEW QUESTION # 63
A pair of aggregation switches needs independent control planes and rapid recovery. Which deployment meets this requirement?
- A. Configure VSF with a shared control plane.
- B. Configure VSX between the two switches.
- C. Use static routing between switches.
Answer: B
Explanation:
VSX provides dual-device redundancy with independent control planes while enabling fast convergence and state synchronization. This design ensures high availability and rapid recovery at the aggregation layer without merging control planes into a single logical switch.
NEW QUESTION # 64
AI Insights suggests overlapping channels on multiple APs. What is the most efficient corrective action?
- A. Review and apply the AI recommendation.
- B. Disable Airmatch temporarily.
- C. Manually reconfigure all APs.
Answer: A
Explanation:
HPE Aruba Networking Central utilizes AI Insights to continuously monitor the network and identify performance bottlenecks like co-channel interference. When overlapping channels are detected, the system generates specific, validated recommendations to optimize the RF environment. Applying these AI-driven recommendations is the most efficient approach because it leverages automated analysis to resolve the conflict across multiple access points simultaneously, eliminating the need for time-consuming manual channel planning or individual device reconfiguration.
NEW QUESTION # 65
A downlink reports flapping. Which Troubleshoot tool provides a guided test you can run from HPE Aruba Networking Central to validate physical health?
- A. Change port speed/duplex manually and observe
- B. Cable test from the Tests tab targeting the specific interface
- C. Open remote console and disable the interface
Answer: B
Explanation:
The Cable Test in the Tests tab provides a guided diagnostic to validate physical layer integrity of a specific interface, helping identify issues such as faulty cabling, poor termination, or signal degradation that commonly cause link flapping.
NEW QUESTION # 66
You notice repeated authentication failures for a group of users. Which data source provides the clearest insight?
- A. Connections card in the client summary view.
- B. RF Health page.
- C. Connectivity path card.
Answer: A
Explanation:
The Connections card in the Client Summary view provides detailed session-level information, including authentication attempts, failures, and connection status for individual users. This makes it the most direct and effective source for analyzing repeated authentication failures within a specific user group.
NEW QUESTION # 67
You notice clients connected to APs have high signal strength but low throughput. What's the best first step to diagnose the issue?
- A. Check channel utilization and interference in the AP Connectivity Performance.
- B. Increase transmit power on all APs.
- C. Lower the minimum data rate.
Answer: A
Explanation:
High signal strength with low throughput typically indicates RF contention, interference, or channel congestion rather than coverage issues. Checking channel utilization and interference in the AP Connectivity Performance view provides immediate insight into airtime congestion and RF conditions affecting performance.
NEW QUESTION # 68
You are consolidating LAN and WLAN administration into one platform. Which HPE Aruba Networking Central capability will achieve the goal to manage all domains from a unified interface?
- A. Single pane of glass for Access Points, Switches, and Gateways
- B. Controller-centric views per feature with local-only access
- C. Inventory-only view with no configuration workflow management
Answer: A
Explanation:
HPE Aruba Networking Central provides a single pane of glass to manage access points, switches, and gateways from one unified interface. This consolidated view enables centralized configuration, monitoring, and policy management across both LAN and WLAN domains, simplifying operations and improving visibility.
NEW QUESTION # 69
Where can you view live throughput, and client counts per AP?
- A. RF Optimization tab.
- B. Device Health dashboard.
- C. AP dashboard > Connectivity performance card.
Answer: C
Explanation:
The Connectivity performance card on the specific AP dashboard provides real-time telemetry data for that individual device. This view is designed to offer immediate visibility into operational metrics, displaying the current data transfer rates and the exact number of associated clients at any given moment. This allows administrators to monitor the live load and performance impact on a per-AP basis without navigating through global network reports.
NEW QUESTION # 70
You need to configure four uplinks between an AOS-CX access and aggregation switch. Which HPE Aruba Networking Central configuration method should you use?
- A. Create a LAG with LACP and bind four member interfaces
- B. Configure four individual access ports and disable spanning-tree
- C. Assign each port to a different VLAN for load distribution
Answer: A
Explanation:
A Link Aggregation Group (LAG) with Link Aggregation Control Protocol (LACP) is the standard method for bundling multiple physical links into a single logical high-bandwidth connection. By binding the four member interfaces into a LAG, the switches treat the uplinks as one entity, which increases total available throughput and provides redundancy. LACP specifically ensures that both ends of the link are correctly configured and functional, preventing loops or traffic loss that could occur if individual ports were manually configured or if spanning-tree were simply disabled.
NEW QUESTION # 71
Which AI-powered feature helps identify the root cause of network issues?
- A. AIOps Insights
- B. Faceplate View
- C. Device Inventory
Answer: A
Explanation:
AIOps Insights uses artificial intelligence and machine learning to analyze network telemetry, identify anomalies, and provide root-cause analysis recommendations.
NEW QUESTION # 72
What is the primary purpose of firmware compliance monitoring?
- A. Configure wireless SSIDs
- B. Track user authentication
- C. Ensure devices run approved software versions
Answer: C
Explanation:
Firmware compliance helps organizations maintain security and operational consistency by ensuring devices are running approved firmware versions.
NEW QUESTION # 73
Which feature allows administrators to upgrade firmware across multiple devices simultaneously?
- A. Faceplate View
- B. Bulk Firmware Upgrade
- C. Client Timeline
Answer: B
Explanation:
Bulk Firmware Upgrade streamlines software maintenance by enabling administrators to schedule and execute firmware updates across multiple devices at once.
NEW QUESTION # 74
HPE Aruba Networking Central reports that several switches are out of firmware compliance.
Which action ensures all sites meet the standard version?
- A. Configure a firmware policy applied at the Global scope
- B. Wait for AI Insights to perform the upgrade automatically
- C. Create a system profile that enforces the desired version
Answer: A
Explanation:
A firmware policy at the Global scope ensures consistent enforcement of the desired firmware version across all sites and devices. This central policy-driven approach allows HPE Aruba Networking Central to continuously assess compliance and guide or automate upgrades so that all switches align with the defined standard version.
NEW QUESTION # 75
A site requires role-based traffic inspection to be performed by Gateways. Which configuration meets this requirement?
- A. Tunneled SSID with Centralized policies
- B. Microbranch SSID with Centralized policies
- C. Mixed SSID with Centralized policies
Answer: A
Explanation:
A tunneled SSID with centralized policies ensures that client traffic is forwarded to the Gateway, where role-based policy enforcement and inspection are applied consistently. This design is required when security processing must be centralized on the Gateway rather than handled locally at the AP.
NEW QUESTION # 76
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