HP HPE6-A78 Exam Questions Instant Access

Question 1

Refer to the exhibit.

An admin has created a WLAN that uses the settings shown in the exhibits (and has not otherwise adjusted the settings in the AAA profile) A client connects to the WLAN Under which circumstances will a client receive the default role assignment?

AThe client has attempted 802 1X authentication, but the MC could not contact the authentication server

BThe client has attempted 802 1X authentication, but failed to maintain a reliable connection, leading to a timeout error

CThe client has passed 802 1X authentication, and the value in the Aruba-User-Role VSA matches a role on the MC

DThe client has passed 802 1X authentication and the authentication server did not send an Aruba-User-Role VSA

Answer : D

In the context of an Aruba Mobility Controller (MC) configuration, a client will receive the default role assignment if they have passed 802.1X authentication and the authentication server did not send an Aruba-User-Role Vendor Specific Attribute (VSA). The default role is assigned by the MC when a client successfully authenticates but the authentication server provides no specific role instruction. This behavior ensures that a client is not left without any role assignment, which could potentially lead to a lack of network access or access control. This default role assignment mechanism is part of Aruba's role-based access control, as documented in the ArubaOS user guide and best practices.

Question 2

What is one way that WPA3-Enterprise enhances security when compared to WPA2-Enterprise?

AWPA3-Enterprise implements the more secure simultaneous authentication of equals (SAE), while WPA2-Enterprise uses 802.1X.

BWPA3-Enterprise provides built-in mechanisms that can deploy user certificates to authorized end-user devices.

CWPA3-Enterprise uses Diffie-Hellman in order to authenticate clients, while WPA2-Enterprise uses 802.1X authentication.

DWPA3-Enterprise can operate in CNSA mode, which mandates that the 802.11 association uses secure algorithms.

Answer : D

WPA3-Enterprise enhances network security over WPA2-Enterprise through several improvements, one of which is the ability to operate in CNSA (Commercial National Security Algorithm) mode. This mode mandates the use of secure cryptographic algorithms during the 802.11 association process, ensuring that all communications are highly secure. The CNSA suite provides stronger encryption standards designed to protect sensitive government, military, and industrial communications. Unlike WPA2, WPA3's CNSA mode uses stronger cryptographic primitives, such as AES-256 in Galois/Counter Mode (GCM) for encryption and SHA-384 for hashing, which are not standard in WPA2-Enterprise.

Question 3

You have an Aruba Mobility Controller (MC) that is locked in a closet. What is another step that Aruba recommends to protect the MC from unauthorized access?

AUse local authentication rather than external authentication to authenticate admins.

BChange the password recovery password.

CSet the local admin password to a long random value that is unknown or locked up securely.

DDisable local authentication of administrators entirely.

Answer : B

Protecting an Aruba Mobility Controller from unauthorized access involves several layers of security. One recommendation is to change the password recovery password, which is a special type of password used to recover access to the device in the event the admin password is lost. Changing this to something complex and unique adds an additional layer of security in the event the physical security of the device is compromised.

Question 4

The first exhibit shows roles on the MC, listed in alphabetic order. The second and third exhibits show the configuration for a WLAN to which a client connects. Which description of the role assigned to a user under various circumstances is correct?

AA user fails 802.1X authentication. The client remains connected, but is assigned the 'guest' role.

BA user authenticates successfully with 802.1 X. and the RADIUS Access-Accept includes an Aruba-User-Role VSA set to 'employeel.'' The client's role is 'guest.'

CA user authenticates successfully with 802.1X. and the RADIUS Access-Accept includes an Aruba-User-Role VSA set to 'employee.' The client's role is 'guest.'

DA user authenticates successfully with 802.1X, and the RADIUS Access-Accept includes an Aruba-User-Role VSA set to 'employeel.' The client's role is 'employeel.'

Answer : D

In a WLAN setup that uses 802.1X for authentication, the role assigned to a user is determined by the result of the authentication process. When a user successfully authenticates via 802.1X, the RADIUS server may include a Vendor-Specific Attribute (VSA), such as the Aruba-User-Role, in the Access-Accept message. This attribute specifies the role that should be assigned to the user. If the RADIUS Access-Accept message includes an Aruba-User-Role VSA set to 'employee1', the client should be assigned the 'employee1' role, as per the VSA, and not the default 'guest' role. The 'guest' role would typically be a fallback if no other role is specified or if the authentication fails.

Question 5

What is a benefit of Protected Management Frames (PMF). sometimes called Management Frame Protection (MFP)?

APMF helps to protect APs and MCs from unauthorized management access by hackers.

BPMF ensures trial traffic between APs and Mobility Controllers (MCs) is encrypted.

CPMF prevents hackers from capturing the traffic between APs and Mobility Controllers.

DPMF protects clients from DoS attacks based on forged de-authentication frames

Answer : D

Protected Management Frames (PMF), also known as Management Frame Protection (MFP), is designed to protect clients from denial-of-service (DoS) attacks that involve forged de-authentication and disassociation frames. These attacks can disconnect legitimate clients from the network. PMF provides a way to authenticate these management frames, ensuring that they are not forged, thus enhancing the security of the wireless network.

IEEE 802.11w amendment, which introduces PMF as a security enhancement to protect management frames.

Wi-Fi Alliance security guidelines for Protected Management Frames (PMF).

Question 6

You have been instructed to look in an AOS Security Dashboard's client list. Your goal is to find clients that belong to the company and have connected to devices that might belong to hackers.

Which client fits this description?

AMAC address: d8:50:e6:f3:6d:a4; Client Classification: Authorized; AP Classification: Suspected Rogue

BMAC address: d8:50:e6:f3:6e:c5; Client Classification: Interfering; AP Classification: Neighbor

CMAC address: d8:50:e6:f3:6e:60; Client Classification: Interfering; AP Classification: Interfering

DMAC address: d8:50:e6:f3:70:ab; Client Classification: Interfering; AP Classification: Suspected Rogue

Answer : A

The AOS Security Dashboard in an AOS-8 solution (Mobility Controllers or Mobility Master) provides a client list through its Wireless Intrusion Prevention (WIP) system, showing the classification of clients and the APs they are connected to. The goal is to identify clients that belong to the company (Authorized clients) and have connected to devices that might belong to hackers (rogue or suspected rogue APs).

Client Classification:

Authorized: A client that has successfully authenticated to an authorized AP and is part of the company's network (e.g., an employee device).

Interfering: A client that is not authenticated to the company's network and is considered external or potentially malicious.

AP Classification:

Authorized: An AP that is part of the company's network and managed by the MC.

Suspected Rogue: An AP that is not authorized and is suspected of being malicious, often because it exhibits suspicious behavior (e.g., a BSSID close to an authorized AP, indicating potential spoofing).

Neighbor: An AP that is not part of the company's network but is not connected to the wired network (e.g., a nearby AP from another organization).

Interfering: An AP that is not part of the company's network and may be causing interference, but is not necessarily malicious.

The requirement is to find a client that is Authorized (belongs to the company) and connected to a Suspected Rogue AP (might belong to hackers).

Option A: MAC address: d8:50:e6:f3:6d:a4; Client Classification: Authorized; AP Classification: Suspected Rogue

This client is classified as 'Authorized,' meaning it belongs to the company, and it is connected to a 'Suspected Rogue' AP, which might belong to hackers. This matches the requirement perfectly.

Option B: MAC address: d8:50:e6:f3:6e:c5; Client Classification: Interfering; AP Classification: Neighbor

This client is 'Interfering' (not a company client) and connected to a 'Neighbor' AP, which is not considered a hacker's device (it's just a nearby AP).

Option C: MAC address: d8:50:e6:f3:6e:60; Client Classification: Interfering; AP Classification: Interfering

This client is 'Interfering' (not a company client) and connected to an 'Interfering' AP, which is not necessarily a hacker's device (it may just be causing interference).

Option D: MAC address: d8:50:e6:f3:70:ab; Client Classification: Interfering; AP Classification: Suspected Rogue

This client is 'Interfering' (not a company client), although it is connected to a 'Suspected Rogue' AP. It does not meet the requirement of being a company client.

The HPE Aruba Networking AOS-8 8.11 User Guide states:

'The Security Dashboard's client list in ArubaOS shows the classification of each client and the AP it is connected to. An 'Authorized' client is one that has successfully authenticated to an authorized AP and is part of the company's network. A 'Suspected Rogue' AP is an unauthorized AP that exhibits suspicious behavior, such as a BSSID close to an authorized AP, indicating potential spoofing by a hacker. To identify security risks, look for authorized clients connected to suspected rogue APs, as this may indicate a company device has connected to a malicious AP.' (Page 415, Security Dashboard Section)

Additionally, the HPE Aruba Networking Security Guide notes:

'WIP classifies clients as 'Authorized' if they have authenticated to an authorized AP managed by the controller. A 'Suspected Rogue' AP is a potential threat, as it may be attempting to mimic a legitimate AP to lure clients. Identifying authorized clients connected to suspected rogue APs is critical for detecting potential attacks, such as man-in-the-middle attempts by hackers.' (Page 78, WIP Classifications Section)

HPE Aruba Networking AOS-8 8.11 User Guide, Security Dashboard Section, Page 415.

HPE Aruba Networking Security Guide, WIP Classifications Section, Page 78.

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Question 7

What is one thing can you determine from the exhibits?

ACPPM originally assigned the client to a role for non-profiled devices. It sent a CoA to the authenticator after it categorized the device.

BCPPM sent a CoA message to the client to prompt the client to submit information that CPPM can use to profile it.

CCPPM was never able to determine a device category for this device, so you need to check settings in the network infrastructure to ensure they support CPPM's endpoint classification.

DCPPM first assigned the client to a role based on the user's identity. Then, it discovered that the client had an invalid category, so it sent a CoA to blacklist the client.

Answer : A

Based on the exhibits which seem to show RADIUS authentication and CoA logs, one can determine that CPPM (ClearPass Policy Manager) initially assigned the client to a role meant for non-profiled devices and then sent a CoA to the network access device (authenticator) once the device was categorized. This is a common workflow in network access control, where a device is first given limited access until it can be properly identified, after which appropriate access policies are applied.

HP Aruba Certified Network Security Associate HPE6-A78 Exam Questions