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| Section | Objectives |
|---|---|
| Topic 1: Network Management with HPE Aruba Networking Central | - Platform overview and architecture
|
| Topic 2: Network Deployment and Configuration | - Initial deployment workflows
|
| Topic 3: Network Operations and Monitoring | - API and automation concepts
|
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28. Frage
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?
Antwort: A
Begründung:
Technical explanation
A spanning-tree profile establishes the loop-free logical forwarding topology while retaining physically redundant links. Configure the correct root bridge at the distribution or core layer, verify edge-port status and validate bridge priorities and allowed VLANs. Rapid spanning-tree variants converge faster than older timer- based designs when implemented consistently. BPDU Guard protects true edge ports, but enabling it on switch-to-switch uplinks can unnecessarily err-disable intended redundant connections. MAC authentication has no direct relationship to Layer 2 loop prevention.
BPDU Guard belongs on edge ports that must never receive BPDUs; applying it to every inter-switch port could disable valid uplinks. MAC authentication determines access identity, not loop-free path selection. STP sets the forwarding/blocking topology.
Official HPE references | Creating a Port Profile for Switches * Step 3-Configuring VLANs and Port Profiles | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central
29. Frage
How does Role-Based Access Control (RBAC) typically assign permissions within the platform?
Antwort: A
Begründung:
Technical explanation
RBAC separates identity, the abstract permission set and the resources to which those rights apply. Create roles with explicit privileges, assign those roles to users or groups and restrict scope to authorized sites or device functions. Users inherit privileges from their role membership; network devices do not inherit user access permissions from a 'role assignment' in the same sense. Validate least privilege using a test operator account rather than giving broad administrator rights simply to resolve visibility issues. In option A, devices incorrectly inherit the operator permissions. Option B attaches permissions to individual users rather than roles. Option C conflates equipment ownership with authorization. Mapping privileges to roles and roles to users is the RBAC principle.
Official HPE references | Multi-Level Hierarchy * HPE Aruba Networking Unified Infrastructure - Solution Overview | Study-guide topic: Network Management with HPE Aruba Networking Central
30. Frage
You suspect DNS resolution failures of wireless clients. Which HPE Aruba Networking Central tool confirms name-resolution status from the AP?
Antwort: A
Begründung:
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.
31. Frage
How to prevent a split-brain during a failure in a Virtual Switching Framework (VSF) stack?
Antwort: C
Begründung:
Technical explanation
Split-detection mechanisms determine which VSF fragment may continue forwarding after stacking-link partition, preventing two active control domains from advertising identical management identities or gateway addresses. On supported 6200/6300 families, management ports participate in detection; certain 4100i/6100 platforms instead use a dedicated MAD VLAN with front-plane ports. The standby fragment can disable non- VSF ports when the conductor fragment remains active. MC-LAG design does not solve a split-brain event inside a VSF stack, and daisy-chain topology offers less fault tolerance than a ring where supported.
MC-LAG applies to multichassis link aggregation, not detecting a partitioned VSF stack. A daisy chain may create a single break point rather than preventing split brain. VSF split detection is built for isolating dangerous dual-active fragments.
Official HPE references | VSF Profile * VSF Split Detection | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central
32. Frage
You are planning to isolate guest and IoT networks on campus. How can you configure separate routing tables and policies per tenant using HPE Aruba Networking Central?
Antwort: A
Begründung:
Technical explanation
Each VRF owns its own forwarding and routing table, allowing Guest, IoT and Employee segments to use separate default routes and route-import policies on supported switches. Associate the corresponding SVIs or routed interfaces with the intended VRF and control any deliberate inter-VRF leakage through explicit security mechanisms. An SVI on its own creates a Layer 3 interface but not an independent routing domain.
Check DHCP relay, DNS access and upstream reachability per VRF, because control-plane separation does not automatically provision the services that each tenant needs. Where guest must reach a shared DNS server, use deliberate inter-VRF route leaking or firewall-controlled service access. A VRF does not automatically create a permitted path between tenant routing tables.
Routed interfaces by themselves do not establish separate routing-table instances. A single shared SVI profile cannot isolate tenant RIBs. Multiple VRFs create independent forwarding tables, with carefully controlled route leaking if cross-tenant access is required.
Official HPE references | Creating a VLAN Profile * Step 3-Configuring VLANs and Port Profiles | Study- guide topic: Managing Wired Networks with HPE Aruba Networking Central
33. Frage
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