Free HP HPE6-A90 Practice Exam with Questions & Answers

Technical explanation

Design a VSF stack with a healthy standby member and, wherever hardware allows, resilient inter-member links arranged to limit the impact of a broken stacking connection. Model both a member failure and a stacking-link failure: they have different consequences, and insufficient topology may isolate members. Enable the platform's supported split-detection mechanism to prevent dual-active fragments. MC-LAG and VSX are valuable for dual-control-plane aggregation switches, but they do not replace the VSF member-role design identified in this stack-specific scenario. The conductor-to-standby takeover test and a stacking-link partition test should be executed separately. Ring-like stacking links where supported reduce the chance that a single cable defect segments the stack.

A VRF per switch is routing separation, not stack availability. The “VSX stack with two or more members” wording is wrong: VSX is a two-peer architecture, while VSF has stack members and conductor/standby roles. Select the actual stack protection.

Official HPE references | VSF Profile • VSF Split Detection | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central

Technical explanation

VSX preserves independent control planes and distinct management endpoints for the two aggregation peers while coordinating shared L2 behavior and downstream multi-chassis LAGs. Test failures of the ISL, keepalive path and one switch separately, because their protective actions are not identical. Static routing between unrelated switches supplies reachability but not the paired logical aggregation capabilities requested. VSF is suitable for a single-control-plane stack, but that is the opposite of the independent-control-plane design requirement. Split-brain handling, peer keepalive and ISL loss are distinct failure cases; the design review should document all three rather than assuming a single “core failed” test covers VSX behavior.

Static routes alone do not supply MC-LAG-like dual-attached switching, and VSF deliberately shares its stack control plane. VSX retains two independently managed systems and coordinates their high-availability role.

Official HPE references | VSX and VSF Connectivity Design - Validated Solution Guide • Creating a VSX Pair | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central

Technical explanation

Open the affected client context and use its event history to align 802.11 association, EAP exchange, RADIUS responses, role assignment and disconnect causes. Distinguish an authentication reject from a timeout or radio-layer disassociation: each leads to a different diagnostic path. Confirm client MAC, username, SSID, AP and timestamps because roaming can transfer the same session across radios. AP-load insights help diagnose capacity, whereas a topology drawing does not capture the per-attempt authentication failure sequence.

An overloaded AP can certainly degrade experience, but AP-load analytics do not supply EAP rejects or server-response timings. Topology traces device relationships rather than the client’s authentication exchange. The event record is the evidence to start with.

Official HPE references | Troubleshooting Tools • Troubleshooting History | Study-guide topic: Network Management with HPE Aruba Networking Central

Technical explanation

An EAP timeout indicates that an expected authentication message or reply did not arrive within its timer; it is not equivalent to an explicit credential rejection. Verify that the gateway or appropriate AP can reach the configured RADIUS server over the correct network, that shared credentials are valid and that UDP 1812 or configured RadSec connectivity functions. Inspect server logs for received requests and response latency. Only after establishing transport health should you inspect user accounts, certificates or EAP-method mismatches.

An “EAP timeout” is a lack of a timely authentication response, not inherently a bad password; credential failures usually create a rejection. Replacing certificates without checking network reachability can destroy useful evidence and does not restore an unreachable server. If RADIUS requests leave the gateway but responses are absent, check firewall rules, shared-secret configuration and server processing. If a timely Access-Reject returns instead, move the investigation to credentials or authorization.

Official HPE references | Troubleshooting Tools • Configuring VLAN Settings for WLAN SSID in Tunnel and Mixed Mode | Study-guide topic: Introduction to AOS-10

Technical explanation

A connection-path visualization relates the client to relevant network nodes and may reveal which hop or service segment reports impaired connectivity. Use it as a structured investigative starting point, then corroborate packet loss using sourced ping, path tests, interface-drop counters and device logs. A logical path diagram is not a packet capture and may omit details of transient ECMP or tunneling behavior. Distinguish RF frame loss on the client/AP link from packet drops on a wired uplink or gateway datapath before applying a fix.

An alert summary merely declares a condition and compliance tracks intended state, not packet forwarding. Connection Path helps narrow which segment of the client experience is impaired, but it should not be treated as proof of every dropped hop without corroborating tests.

Official HPE references | Troubleshooting Tools • Application Visibility | Study-guide topic: Network Management with HPE Aruba Networking Central

Technical explanation

AI-derived RF recommendations should be assessed against channel quality, neighboring AP assignments, regulatory limits and the operational change window. AirMatch computes channel, bandwidth and power plans from aggregated AP telemetry, rather than assuming every AP requires a manual static channel. Confirm the recommendation fits the affected site's survey and any reserved channels before permitting changes. Disabling AirMatch eliminates the automation that normally manages RF resource reuse and is not a logical response to detected overlap.

Manually rebuilding every AP channel plan discards the fleet-wide context of AirMatch. Disabling AirMatch removes the optimization mechanism that can correct overlap. Check the recommendation’s assumptions and scope before applying it.

Official HPE references | AirMatch • AOS-10 Cloud Services | Study-guide topic: Introduction to AOS-10

Technical explanation

Creating an SVI directly for a particular switch requires a device-appropriate local profile so its unique routed address is not unintentionally imposed on every switch that shares the VLAN definition. Reusable VLAN identity and shared subnet policy can remain centrally defined while the interface IP is assigned locally or through a device-specific alias. Validate address uniqueness and routing adjacency after deployment. A Library object cannot independently carry a unique per-device address without appropriate scope or alias resolution, and disabling the VLAN defeats the logical SVI's Layer 2 association.

A Library profile is normally a reusable template, not the place for every switch’s unique SVI address. Disabling the VLAN destroys the L3 VLAN interface’s purpose. The Switch Interface Configuration profile is related to applying profiles to interfaces, but the per-switch IP is entered as local SVI configuration.

Official HPE references | Creating a Port Profile for Switches • Creating a VLAN Profile | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central

Technical explanation

In the global or site context, Device Health counts APs, switches, gateways and bridges by health classification. Expand the card to compare the same metrics by site and select the affected location for a closer device list. Health aggregation helps prioritize teams and incidents by location but should not be interpreted as identifying the underlying fault. Inventory primarily lists assets and assignment, while AI Insights investigates patterns and anomalies; the health card is the direct summary requested.

Inventory can count devices but is not organized around their assessed health; AI Insights explains anomalies rather than serving as the core device-count summary. The Device Health card answers the operational question directly.

Official HPE references | Planets in Global Monitoring Page • Device Health Card | Study-guide topic: Network Management with HPE Aruba Networking Central

Technical explanation

AirMatch is the Central-hosted RF optimization service that computes channel, bandwidth and EIRP plans from aggregated radio telemetry. It can optimize neighboring radios together rather than having each AP operate on purely local observations. The service normally calculates scheduled improvements and can react to urgent RF events, subject to regulatory channel constraints and deployment settings. ARM is an earlier local RF-management approach, while ClientMatch primarily addresses client-to-AP association and steering rather than the overall channel/power plan.

ARM is the legacy/local RF adjustment concept, while ClientMatch steers associations among available APs. AirMatch plans channels, channel widths, and transmit powers using network-wide conditions; that is the AOS-10 RF management component.

Official HPE references | AirMatch • AOS-10 Cloud Services | Study-guide topic: Introduction to AOS-10

Technical explanation

Instant AP groups traditionally use a local elected virtual conductor or equivalent cluster coordination model. AOS-10 APs do not select a local AP conductor for these centralized functions; configuration, RF planning, neighbor coordination and key-management services are orchestrated by Central. This does not imply that an AP is helpless during a cloud outage: existing datapath and configuration continue to operate within documented survivability limits. Some new coordination operations may be deferred until Central connectivity returns, whereas previously synchronized roaming information may remain available.

An elected AP conductor is the Instant model being contrasted, not the AOS-10 architecture. Peer-only telemetry and local controller-based roaming do not describe Central’s cloud-supported services; individual APs maintain their datapaths while Central provides relevant shared services.

Official HPE references | AOS-10 Cloud Services • Roaming and the Key Management Service | Study-guide topic: Introduction to AOS-10