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HPE Campus Access Switching Expert Written Exam Sample Questions (Q11-Q16):

NEW QUESTION # 11
The user's device is failing 802.1 Xwith EAP-TLS authentication. We know that theclient-side certificate is valid. What is the likely cause of this issue? (Select two.)

A. The user's device is using the wrong MAC address
B. There Is an EAP-type mismatch.
C. There is a problem with the ACL applied to the switch port
D. The user's device is not configured to use the correct gateway.
E. The NAD is not able to communicate with DNS servers.

Answer: B,E

Explanation:
The user's device fails 802.1X EAP-TLS authentication, but the client-side certificate is known to be valid.
We need two likely causes.
* EAP-TLS Process:Involves mutual certificate validation and TLS handshake between client and RADIUS server (proxied by NAD).
* Causes (Client Cert OK):
* Server Certificate Issues: Client doesn't trust server cert (Untrusted CA, name mismatch, expired).
* EAP Type Mismatch:Client supplicant configured for different EAP type than RADIUS server policy.
* RADIUS Server Issues:Policy misconfiguration, user not found, internal errors.
* NAD <-> RADIUS Communication Failure:Switch cannot reach RADIUS server (IP connectivity, firewall, routing), incorrect shared secret.
* Client Supplicant Misconfiguration:Incorrect identity, settings other than the certificate itself.
* Network packet loss.
* Analysis of Options (Select Two):
* A: Wrong gateway affects L3 post-authentication.
* B: ACL blocking EAPoL/RADIUS is possible but less common than config errors.
* C:EAP-type mismatch:A very common configuration error leading to failure.
* D: Wrong MAC address is irrelevant for EAP-TLS failure itself.
* E: NAD not able to communicate with DNS servers: DNS isn't directly involved in EAP-TLS.
However, if interpreted more broadly asNAD not able to communicate with the RADIUS server(due to IP routing, firewall, or incorrect server address), this is a very common cause of failure.
* Conclusion:An EAP-type mismatch (C) is a prime suspect when basic certificate validity is assumed.
Failure of the Network Access Device (NAD - the switch) to communicate with the RADIUS server (E, interpreted broadly as RADIUS reachability) is another major category of failure causes.
References:EAP-TLS (RFC 5216), 802.1X Troubleshooting Guides, ClearPass Documentation. This relates to "Troubleshooting" (10%), "Security" (10%), and "Authentication/Authorization" (9%).

NEW QUESTION # 12
You want to use OSPF to advertise a only . summary route for the SVlsbelow to a neighbor In the same area (area 0).
Which configuration will achieve this?

Answer: A

Explanation:
The goal is to configure OSPF on a router so that it advertisesonlya 10.1.0.0/16 summary route for the specific SVIs (VLAN 11, 12, 13, assumed to be within the 10.1.x.x range) to its OSPF neighborswithin the same area (Area 0).
* OSPF Intra-Area Behavior:A fundamental principle of OSPF (link-state protocols) is that all routers within the same area must have an identical Link State Database (LSDB) for that area. This means all routers learn about all the specific networks (Type-1 Router LSAs, Type-2 Network LSAs) within their area. OSPFv2 doesnotsupport summarizing routes in a way that hides specific network LSAs from other routerswithin the same area. Summarization occurs only at area boundaries (by ABRs using Type-
3 Summary LSAs via the area range command) or for external routes redistributed into OSPF (by ASBRs using Type-5 External LSAs via the summary-address command).
* Analysis of Options:
* A) area 0 range 10.1.0.0/16:This command is used on an Area Border Router (ABR) to summarize routes originatingfromArea 0 when advertising theminto another area(e.g., the backbone). It does not affect LSA floodingwithinArea 0. It also includes redistribute connected, which is unrelated here.
* B) summary-address 10.1.0.0/16:This command is used on an Autonomous System Boundary Router (ASBR) to summarizeexternalroutes being redistributed into OSPF. It is not used for summarizing internal OSPF routes like SVIs defined within an OSPF area.
* C) & D) summary-address 10.1.0.0/16:Same issue as B; incorrect command for summarizing internal OSPF routes.
* E) area 0 range 10.1.0.0/16:Similar to A, this uses the area range command. It correctly shows the SVIs configured for OSPF Area 0 first. However, like A, this command performs inter-area summarization on an ABR and does not suppress the specific LSAswithinArea 0.
* Conclusion:The question asks for something that OSPFv2 cannot do: advertiseonlya summary route within the same area while suppressing specifics. Therefore, none of the configurations will achieve the exactstated outcome. However, if the question is flawed and intends to ask which configuration uses the correct command structure for summarizinginternalOSPF routes (even if only effective between areas), then the area range command is the relevant one. Both A and E use this command. Option E is slightly better structured as it shows the interfaces being added to OSPF Area 0 first. Assuming this is the intended direction despite the impossibility of the specific request, E is the most plausible choice among the given options.
References:RFC 2328 (OSPFv2), OSPF Configuration Guides for AOS-CX (explaining area range for ABRs and summary-address for ASBRs). This relates to the "Routing" (16%) objective.

NEW QUESTION # 13
A customer hassot a requirement for VLAN 151 to be an isolated VLAN. A colleague has copied and pasted a partialconfiguration, but you do not achieve the desired outcome. This is the code that was added:
What should be added to the configuration before this code to achieve the desired result?

Answer: C

Explanation:
The customer requires VLAN 151 to be configured as an isolated Private VLAN. A partial configuration was added, but the desired outcome wasn't achieved. We need to determine which configuration snippet should be addedbeforethe (unspecified) partial configuration to correctly set up the Private VLAN structure.
* Private VLAN Configuration Fundamentals:
* APrimary VLANmust be defined. This VLAN carries traffic between promiscuous ports and ports in associated secondary VLANs.
* Secondary VLANs(either isolated or community) are associated with the primary VLAN.
* Ports are then mapped to either the primary VLAN (promiscuous ports, typically router/firewall connections) or a secondary VLAN (host ports). Isolated ports within thesameisolated VLAN cannot communicate with each other.
* Analyzing the Options (Assuming VLAN 15 is the intended Primary):
* A)
vlan 15
private-vlan primary
vsx-sync
This correctly defines VLAN 15 as the Primary Private VLAN. The vsx-sync command ensures this configuration is synchronized across a VSX pair (relevant if applicable). This is the necessary prerequisite before defining VLAN 151 as an isolated secondary VLAN and associating it with VLAN 15.
* B)isolated-vlan primary is incorrect syntax. The command is private-vlan primary.
* C)primary-vlan isolated 151 is incorrect syntax for defining either the primary or secondary VLAN type/association within the primary VLAN context.
* D)private-vlan isolated 151 within the vlan 15 context is incorrect syntax. The private-vlan isolated command belongs under the configuration of the secondary VLAN (VLAN 151 in this case).
* Conclusion:Before configuring VLAN 151 as private-vlan isolated and associating it, the primary VLAN must be defined. Option A correctly shows the command (private-vlan primary) under the intended primary VLAN's configuration (vlan 15) to establish it as the primary VLAN.
References:AOS-CX Security Guide (Private VLAN configuration steps and commands). This relates to the
"Switching" (19%) and "Security" (10%) objectives.

NEW QUESTION # 14
A senior engineer from the network operations team has reported an intermittent problem where some PoE- powered devices are randomly losing power. During your investigation, you found that port 1 of the Acc-1 switch is currently presenting the behavior shown in the CLI output for the Acc-1.

What is a probablecausa lot poor 1/1/1 is denying PoE?

A. PoE port priority sot to low
B. This switch does no! support PoE class 4.
C. switch PoE powerbudget exceeded
D. PoE was manually disabled for port 1/1/1.

Answer: C

Explanation:
The question involves intermittent PoE-powered device power loss on port 1/1/1 of an AOS-CX switch (Acc-
1), with CLI output (not provided) indicating a PoE issue. The task is to identify a probable cause.
* Analysis of Options:
* Option A:Incorrect. AOS-CX switches typically support PoE Class 4 (802.3at, 30W), sufficient for most devices.
* Option B:Correct. If the switch's PoE power budget is exceeded, it may deny power to port 1/1
/1, causing intermittent device failures.
* Option C:Incorrect. Low PoE port priority may deprioritize the port but is less likely to cause complete power loss compared to budget issues.
* Option D:Incorrect. Manual disabling of PoE would cause consistent power loss, not intermittent issues.
* Why Option B is Correct:AOS-CX switches have a finite PoE power budget (e.g., 370W or 740W, depending on the model and power supply). If the total power demand from connected devices exceeds this budget, the switch denies power to some ports, often intermittently as devices cycle or negotiate power. For port 1/1/1, this could manifest as random power loss for the connected device. The CLI output likely shows a "power denied" status (e.g., via show power-over-ethernet brief). Checking the PoE budget (show power-over-ethernet) and upgrading power supplies or prioritizing critical ports resolves the issue, aligning with HPE Aruba Networking's PoE troubleshooting guidelines.
* Relevance to Certification Objectives:
* Connectivity (9%):Troubleshooting PoE deployment issues.
* Troubleshooting (10%):Diagnosing power-related issues in campus networks.
* Switching (19%):Implementing PoE configurations for Layer 2 devices.
References:
HPE Aruba Networking AOS-CX Configuration Guide: PoE Configuration and Troubleshooting.
HPE7-A06Study Guide: Covers PoE management and diagnostics.
HPE Aruba Networking Technical Documentation: PoE Budget Troubleshooting.

NEW QUESTION # 15
You haverecently configured a switch for 802.IX authentication with HPE Aruba Networking ClearPass. A security admin is seeing events withthe following description in ClearPass Event Viewer.
RADIUS authentication attempt from unknown NAD (10.10.1.10:1812)'
Which command should you us to identify theconfiguration issue?

A. show aaa authentication-server radius
B. show radius-server detail
C. show ip source-interfaceradius
D. show radius-server shared-secret

Answer: C

Explanation:
The ClearPass Event Viewer message "RADIUS authentication attempt from unknown NAD (10.10.1.10:
1812)" indicates that ClearPass received a RADIUS request from the IP address 10.10.1.10, but this IP is not configured as a trusted Network Access Device (NAD) in ClearPass's network device list, or the shared secret doesn't match. The first step in troubleshooting on the switch side is to verify which source IP address the switch is actually using to send these RADIUS requests.
* RADIUS Source IP:AOS-CX switches can be configured to use a specific source IP address for RADIUS packets, often using the ip source-interface radius [vrf <vrf-name>] command. This is important if the switch has multiple IP interfaces or uses VRFs.
* Analysis of Commands:
* A. show ip source-interface radius: This command directly displays the configured source interface and IP address used for RADIUS communications, allowing comparison with the IP configured in ClearPass.
* B. show aaa authentication-server radius: Shows server group configuration, not the source IP used by the switch.
* C. show radius-server shared-secret: Not a standard command; secrets are usually masked in other commands.
* D. show radius-server detail: Shows configured RADIUS server details but doesn't explicitly show the source IP the switch is using to originate packets.
* Conclusion:To identify why ClearPass sees requests from an "unknown NAD" IP (10.10.1.10), the first step on the switch is to confirm which source IP it's using. show ip source-interface radius provides this crucial information.
References:AOS-CX Security Guide (RADIUS Client Configuration, ip source-interface), ClearPass Documentation (NAD Configuration). This relates to "Authentication/Authorization" (9%) and
"Troubleshooting" (10%) objectives.

NEW QUESTION # 16
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