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HPE6-A84 Pack
Vendor: HP
Exam Code: HPE6-A84
Exam Name: Aruba Certified Network Security Expert Written Exam
Exam Questions: 60
Last Updated: October 4, 2025
Related Certifications: HP Aruba
Exam Tags: Networking
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Free HP HPE6-A84 Exam Actual Questions

Question No. 1

Refer to the scenario.

This customer is enforcing 802.1X on AOS-CX switches to Aruba ClearPass Policy Manager (CPPM). The customer wants switches to download role settings from CPPM. The ''reception-domain'' role must have these settings:

--- Assigns clients to VLAN 14 on switch 1, VLAN 24 on switch 2, and so on.

--- Filters client traffic as follows:

--- Clients are permitted full access to 10.1.5.0/24 and the Internet

--- Clients are denied access to 10.1.0.0/16

The switch topology is shown here:

How should you configure the VLAN setting for the reception role?

Show Answer Hide Answer
Correct Answer: A

According to the AOS-CX User Guide, one way to configure the VLAN setting for the reception role is to assign a consistent name to VLAN 14, 24, or 34 on each access layer switch and reference that name in the enforcement profile VLAN settings. This way, the switches can download the role settings from CPPM and apply the correct VLAN based on the name, rather than the ID. For example, the enforcement profile VLAN settings could be:

And the VLAN configuration on each switch could be:


Question No. 2

Refer to the scenario.

A customer requires these rights for clients in the ''medical-mobile'' AOS firewall role on Aruba Mobility Controllers (MCs):

External devices should not be permitted to initiate sessions with ''medical-mobile'' clients, only send return traffic.

The exhibits below show the configuration for the role.

There are multiple issues with this configuration. What is one change you must make to meet the scenario requirements? (In the options, rules in a policy are referenced from top to bottom. For example, ''medical-mobile'' rule 1 is ''ipv4 any any svc-dhcp permit,'' and rule 8 is ''ipv4 any any any permit''.)

Show Answer Hide Answer
Correct Answer: B

The subnet mask in rule 3 of the ''medical-mobile'' policy is currently 255.255.252.0, which means that the rule denies access to the 10.1.12.0/22 subnet as well as the adjacent 10.1.16.0/22 subnet1. This is not consistent with the scenario requirements, which state that only the 10.1.12.0/22 subnet should be denied access, while the rest of the 10.1.0.0/16 range should be permitted access.

To fix this issue, the subnet mask in rule 3 should be changed to 255.255.248.0, which means that the rule only denies access to the 10.1.8.0/21 subnet, which includes the 10.1.12.0/22 subnet1. This way, the rule matches the scenario requirements more precisely.


Question No. 3

Refer to the exhibit.

A customer requires protection against ARP poisoning in VLAN 4. Below are listed all settings for VLAN 4 and the VLAN 4 associated physical interfaces on the AOS-CX access layer switch:

What is one issue with this configuration?

Show Answer Hide Answer
Correct Answer: D

This is because ARP inspection is a security feature that validates ARP packets in a network and prevents ARP poisoning attacks12ARP inspection works by intercepting, logging, and discarding ARP packets with invalid IP-to-MAC address bindings1To enable ARP inspection, the switch needs to know which ports are trusted and which are untrusted. Trusted ports are those that connect to authorized DHCP servers or other network devices that are not vulnerable to ARP spoofing.Untrusted ports are those that connect to end hosts or devices that might send forged ARP packets13

In the exhibit, LAG 1 is configured as a trusted port for ARP inspection, which is correct because it connects to the core switch. However, the edge ports (1/1/1-1/1/24) are not configured as untrusted ports for ARP inspection, which is incorrect because they connect to end hosts that might be compromised by an attacker. By default, all ports are untrusted for ARP inspection, but this can be changed by using the commandip arp inspection truston the interface configuration mode3Therefore, to protect VLAN 4 against ARP poisoning, the edge ports should be configured as untrusted for ARP inspection by using the commandno ip arp inspection truston the interface configuration mode.This way, the switch will validate the ARP packets received on these ports against the DHCP snooping database or an ARP access-list and drop any invalid packets34

A) ARP proxy is not enabled on VLAN 4.This is not an issue because ARP proxy is an optional feature that allows the switch to respond to ARP requests on behalf of hosts in different subnets5It is not related to ARP poisoning or ARP inspection.

B) LAG 1 is configured as trusted for ARP inspection but should be untrusted. This is not an issue because LAG 1 connects to the core switch, which is a trusted device that does not send forged ARP packets.

C) DHCP snooping is not enabled on VLAN 4.This is not an issue because DHCP snooping is a separate feature that prevents rogue DHCP servers from offering IP addresses to clients6It is not directly related to ARP poisoning or ARP inspection, although it can provide information for ARP inspection validation if enabled


Question No. 4

Which element helps to lay the foundation for solid network security forensics?

Show Answer Hide Answer
Correct Answer: D

This is because network forensics relies on the analysis of network traffic data, which is often time-stamped by the devices that generate or transmit it.Having a synchronized and accurate clock across all network devices helps to establish a reliable timeline of events and correlate different sources of evidence12

A)Enable BPDU protection and loop protection on edge switch ports is not related to network security forensics, but rather to preventing network loops and topology changes caused by rogue switches or bridges3

B) Enabling debug-level information for network infrastructure device logs might provide more details about the network activity, but it also consumes more resources and storage, and might not be relevant or useful for forensic analysis.Moreover, debug-level information might not be available for long-term retention or legal purposes4

C) Implementing 802.1X authentication on switch ports that connect to APs is a good security practice to prevent unauthorized access to the network, but it does not directly help with network security forensics.802.1X authentication does not capture or record network traffic data, which is the main source of evidence for network forensics


Question No. 5

A company has Aruba gateways and wants to start implementing gateway IDS/IPS. The customer has selected Block for the Fail Strategy.

What might you recommend to help minimize unexpected outages caused by using this particular fall strategy?

Show Answer Hide Answer
Correct Answer: D

The correct answer is D. Enabling alerts and email notifications for events related to gateway IPS engine utilization and errors.

Gateway IDS/IPS is a feature that allows the Aruba gateways to monitor and block malicious or unwanted traffic based on predefined or custom rules 1. The Fail Strategy is a setting that determines how the gateways handle traffic when the IPS engine fails or crashes 2. The Block option means that the gateways will stop forwarding traffic until the IPS engine recovers, while the Bypass option means that the gateways will continue forwarding traffic without inspection 2.

The Block option provides more security, but it also increases the risk of network outages if the IPS engine fails frequently or for a long time 2. To minimize this risk, it is recommended to enable alerts and email notifications for events related to gateway IPS engine utilization and errors 3. This way, the network administrators can be informed of any issues with the IPS engine and take appropriate actions to restore or troubleshoot it 3.

The other options are not correct or relevant for this issue:

Option A is not correct because configuring a relatively high threshold for the gateway threat count alerts would not help minimize unexpected outages caused by using the Block option. The gateway threat count alerts are used to notify the network administrators of the number of threats detected by the IPS engine, but they do not affect how the gateways handle traffic when the IPS engine fails 4.

Option B is not correct because making sure that the gateways have formed a cluster and operate in default gateway mode would not help minimize unexpected outages caused by using the Block option. The gateway cluster mode is used to provide high availability and load balancing for the gateways, but it does not affect how the gateways handle traffic when the IPS engine fails . The default gateway mode is used to enable routing and NAT functions on the gateways, but it does not affect how the gateways handle traffic when the IPS engine fails .

Option C is not correct because setting the IDS or IPS policy to the least restrictive option, Lenient, would not help minimize unexpected outages caused by using the Block option. The IDS or IPS policy is used to define what rules are applied by the IPS engine to inspect and block traffic, but it does not affect how the gateways handle traffic when the IPS engine fails 2. The Lenient option contains fewer and older rules than the Moderate or Strict options, which means that it provides less security and more false negatives .


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