Name: Aruba Certified Network Security Expert Written Exam
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Free HP HPE6-A84 Exam Actual Questions

The questions for HPE6-A84 were last updated On Apr 21, 2025

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Question No. 1

Refer to the scenario.

A customer has asked you to review their AOS-CX switches for potential vulnerabilities. The configuration for these switches is shown below:

What is one immediate remediation that you should recommend?

AChanging the switch's DNS server to the mgmt VRF

BSetting the clock manually instead of using NTP

CEither disabling DHCPv4-snoopinq or leaving it enabled, but also enabling ARP inspection

DDisabling Telnet

Show Answer

Correct Answer: D

According to the AOS-CX Switches Multiple Vulnerabilities1, one of the vulnerabilities (CVE-2021-41001) affects the Telnet service on AOS-CX switches. This vulnerability allows an unauthenticated remote attacker to cause a denial-of-service condition on the switch by sending specially crafted Telnet packets. The impact of this vulnerability is high, as it could result in a loss of management access and network disruption. Therefore, one immediate remediation that you should recommend is to disable Telnet on the switch. This way, the switch can prevent any malicious Telnet traffic from reaching it and avoid the exploitation of this vulnerability.

Question No. 2

A customer has an AOS 10 architecture, consisting of Aruba AP and AOS-CX switches, managed by Aruba Central. The customer wants to obtain information about the clients, such as their general category and OS.

What should you explain?

AThe customer must deploy Aruba gateways in order to receive any client profiling information.

BYou will need to set up Aruba Central as a secondary IP helper for client VLANs, but this will not interfere with existing operations.

CAruba Central will automatically derive this information using telemetry from the Aruba devices.

DThe customer should set up a dedicated switch VSX group to sniff packets and direct them to Aruba Central.

Show Answer

Correct Answer: C

Aruba Central can provide visibility and profiling of clients using the Client Insights feature, which is an AI-powered solution that uses native infrastructure telemetry to identify and classify clients based on their OS and general category. This feature does not require any additional hardware or software, such as gateways, IP helpers, or packet sniffers. It works by collecting and analyzing data from the Aruba APs and AOS-CX switches that are managed by Aruba Central. You can find more information about Client Insights in the Visibility and profiling solutions | HPE Aruba Networking page and the Clients Profile - Aruba page.

Question No. 3

A customer wants CPPM to authenticate non-802.1X-capable devices. An admin has created the service shown in the exhibits below:

What is one recommendation to improve security?

AAdding an enforcement policy rule that denies access to endpoints with the Conflict flaq

BUsing Active Directory as the authentication source

CCreating and using a custom MAC-Auth authentication method

DEnabling caching of posture and roles

Show Answer

Correct Answer: C

MAC Authentication Bypass (MAB) is a technique that allows non-802.1X-capable devices to bypass the 802.1X authentication process and gain network access based on their MAC addresses. However, MAB has some security drawbacks, such as the possibility of MAC address spoofing or unauthorized devices being added to the network. Therefore, it is recommended to use a custom MAC-Auth authentication method that adds an additional layer of security to MAB.

A custom MAC-Auth authentication method is a method that uses a combination of the MAC address and another attribute, such as a username, password, or certificate, to authenticate the device. This way, the device needs to provide both the MAC address and the additional attribute to gain access, making it harder for an attacker to spoof or impersonate the device. A custom MAC-Auth authentication method can be created and configured in ClearPass Policy Manager (CPPM) by following the steps in the Customizing MAC Authentication - Aruba page.

Question No. 4

Refer to the scenario.

A customer has an Aruba ClearPass cluster. The customer has AOS-CX switches that implement 802.1X authentication to ClearPass Policy Manager (CPPM).

Switches are using local port-access policies.

The customer wants to start tunneling wired clients that pass user authentication only to an Aruba gateway cluster. The gateway cluster should assign these clients to the ''eth-internet" role. The gateway should also handle assigning clients to their VLAN, which is VLAN 20.

The plan for the enforcement policy and profiles is shown below:

The gateway cluster has two gateways with these IP addresses:

* Gateway 1

o VLAN 4085 (system IP) = 10.20.4.21

o VLAN 20 (users) = 10.20.20.1

o VLAN 4094 (WAN) = 198.51.100.14

* Gateway 2

o VLAN 4085 (system IP) = 10.20.4.22

o VLAN 20 (users) = 10.20.20.2

o VLAN 4094 (WAN) = 198.51.100.12

* VRRP on VLAN 20 = 10.20.20.254

The customer requires high availability for the tunnels between the switches and the gateway cluster. If one gateway falls, the other gateway should take over its tunnels. Also, the switch should be able to discover the gateway cluster regardless of whether one of the gateways is in the cluster.

What is one change that you should make to the solution?

AChange the ubt-client-vlan to VLAN 13.

BConfigure edge ports in VLAN trunk mode.

CRemove VLAN assignments from role configurations on the gateways.

DConfigure the UBT solution to use VLAN extend mode.

Show Answer

Correct Answer: C

The UBT solution requires that the VLAN assignments for the wired clients are done by the gateway, not by the switch. Therefore, the role configurations on the gateways should not have any VLAN assignments, as they would override the VLAN 20 that is specified in the enforcement profile. Instead, the role configurations should only have policies that define the access rights for the clients in the ''eth-internet'' role.This way, the gateway can assign the clients to VLAN 20 and apply the appropriate policies based on their role1

1: Aruba Certified Network Technician (ACNT) | HPE Aruba Networking, section ''Get the Edge: An Introduction to Aruba Networking Solutions''

Question No. 5

Refer to the scenario.

# Introduction to the customer

You are helping a company add Aruba ClearPass to their network, which uses Aruba network infrastructure devices.

The company currently has a Windows domain and Windows C

AThe Window CA issues certificates to domain computers, domain users, and servers such as domain controllers. An example of a certificate issued by the Windows CA is shown here.

The company is in the process of adding Microsoft Endpoint Manager (Intune) to manage its mobile clients. The customer is maintaining the on-prem AD for now and uses Azure AD Connect to sync with Azure AD.
# Requirements for issuing certificates to mobile clients
The company wants to use ClearPass Onboard to deploy certificates automatically to mobile clients enrolled in Intune. During this process, Onboard should communicate with Azure AD to validate the clients. High availability should also be provided for this scenario; in other words, clients should be able to get certificates from Subscriber 2 if Subscriber 1 is down.
The Intune admins intend to create certificate profiles that include a UPN SAN with the UPN of the user who enrolled the device.
# Requirements for authenticating clients
The customer requires all types of clients to connect and authenticate on the same corporate SSID.
The company wants CPPM to use these authentication methods:
To succeed, EAP-TLS (standalone or as a TEAP method) clients must meet these requirements:
# Requirements for assigning clients to roles
After authentication, the customer wants the CPPM to assign clients to ClearPass roles based on the following rules:
The customer requires CPPM to assign authenticated clients to AOS firewall roles as follows:
# Other requirements
Communications between ClearPass servers and on-prem AD domain controllers must be encrypted.
# Network topology
For the network infrastructure, this customer has Aruba APs and Aruba gateways, which are managed by Central. APs use tunneled WLANs, which tunnel traffic to the gateway cluster. The customer also has AOS-CX switches that are not managed by Central at this point.

# ClearPass cluster IP addressing and hostnames
A customer's ClearPass cluster has these IP addresses:
The customer's DNS server has these entries
The customer has now decided that it needs CPPM to assign certain mobile-onboarded devices to a ''nurse-call'' AOS user role. These are mobile-onboarded devices that are communicating with IP address 10.1.18.12 using port 4343.
What are the prerequisites for fulfilling this requirement?

ASetting up traffic classes and role mapping rules within Central's global settings

BCreating server-based role assignment rules on APs that apply roles to clients based on traffic destinations

CCreating server-based role assignment rules on gateways that apply roles to clients based on traffic destinations

DCreating a tag on Central to select the proper destination connection and integrating CPPM with Device Insight

Show Answer

Correct Answer: C