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HP Aruba Certified Network Security Associate Exam Sample Questions (Q34-Q39):
NEW QUESTION # 34
Refer to the exhibits.
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?
Answer: A
Explanation:
The exhibit shows the configuration of a WLAN on an AOS-8 Mobility Controller (MC) with the following settings:
Key management: WPA3-Enterprise (indicating 802.1X authentication).
Use CNSA suite: Unchecked (using standard encryption, not the Commercial National Security Algorithm suite).
Key size: 128 bits (standard for AES-GCMP in WPA3).
Reauth interval: 1440 minutes (24 hours, the interval for re-authentication).
Machine authentication: Disabled (only user authentication is required).
Blacklisting: Disabled (clients are not blacklisted after failed attempts).
The question states that the AAA profile settings have not been adjusted, meaning the default roles (e.g., initial role, logon role, 802.1X default role) are not specified in the exhibit and are assumed to be the system defaults (e.g., "logon" for the initial and logon roles, and a default role like "guest" for the 802.1X default role). The question asks under which circumstances a client will receive the "default role assignment," which refers to the 802.1X default role configured in the AAA profile for the WLAN.
802.1X Authentication Process in AOS-8:
When a client connects to a WPA3-Enterprise WLAN, it starts in the initial role (typically "logon") to allow basic connectivity (e.g., DHCP, DNS).
During 802.1X authentication, the client is placed in the logon role to allow communication with the authentication server (e.g., ClearPass Policy Manager, CPPM).
If authentication succeeds, the client is assigned a role:
If the authentication server (e.g., CPPM) sends an Aruba-User-Role VSA with a role that exists on the MC, the client is assigned that role.
If no Aruba-User-Role VSA is sent, the client is assigned the 802.1X default role configured in the AAA profile for the WLAN.
If authentication fails or the server is unreachable, the client may be assigned a different role (e.g., a critical role, if configured) or denied access.
Option A, "The client has attempted 802.1X authentication, but the MC could not contact the authentication server," is incorrect. If the MC cannot contact the authentication server (e.g., due to a timeout), the client does not receive the 802.1X default role. Instead, the MC may apply a critical role (if configured) or deny access, depending on the configuration. The 802.1X default role is applied only after successful authentication.
Option B, "The client has passed 802.1X authentication, and the authentication server did not send an Aruba-User-Role VSA," is correct. If the client successfully authenticates via 802.1X and the authentication server (e.g., CPPM) does not send an Aruba-User-Role VSA, the MC assigns the client the 802.1X default role configured in the AAA profile for the WLAN. This is the "default role assignment" referred to in the question.
Option C, "The client has attempted 802.1X authentication, but failed to maintain a reliable connection, leading to a timeout error," is incorrect. A timeout error during authentication (e.g., the client fails to respond to EAP messages) typically results in an authentication failure, not a successful authentication. The client would not receive the 802.1X default role; it might be denied access or placed in a different role (e.g., a pre-authentication role).
Option D, "The client has passed 802.1X authentication, and the value in the Aruba-User-Role VSA matches a role on the MC," is incorrect. If the authentication server sends an Aruba-User-Role VSA with a role that exists on the MC, the client is assigned that specific role, not the 802.1X default role.
The HPE Aruba Networking AOS-8 8.11 User Guide states:
"After a client successfully authenticates via 802.1X, the Mobility Controller assigns a role to the client. If the authentication server (e.g., a RADIUS server) sends an Aruba-User-Role VSA with a role that exists on the controller, the client is assigned that role. If no Aruba-User-Role VSA is sent in the Access-Accept message, the client is assigned the 802.1X default role configured in the AAA profile for the WLAN. For example, if the AAA profile specifies 'guest' as the 802.1X default role, the client will be assigned the 'guest' role." (Page 305, Role Assignment Section) Additionally, the HPE Aruba Networking Wireless Security Guide notes:
"In WPA3-Enterprise with 802.1X authentication, the default role assignment occurs when a client successfully authenticates but the authentication server does not specify a role via the Aruba-User-Role VSA. In this case, the client receives the 802.1X default role defined in the AAA profile, such as 'guest' or another role configured by the administrator." (Page 42, 802.1X Role Assignment Section)
:
HPE Aruba Networking AOS-8 8.11 User Guide, Role Assignment Section, Page 305.
HPE Aruba Networking Wireless Security Guide, 802.1X Role Assignment Section, Page 42.
NEW QUESTION # 35
You configure an ArubaOS-Switch to enforce 802.1X authentication with ClearPass Policy Manager (CPPM) denned as the RADIUS server Clients cannot authenticate You check Aruba ClearPass Access Tracker and cannot find a record of the authentication attempt.
What are two possible problems that have this symptom? (Select two)
Answer: A,D
Explanation:
If clients cannot authenticate and there is no record of the authentication attempt in Aruba ClearPass Access Tracker, two possible problems that could cause this symptom are:
The RADIUS shared secret does not match between the switch and CPPM. This mismatch would prevent the switch and CPPM from successfully communicating, so authentication attempts would fail, and no record would appear in Access Tracker.
CPPM does not have a network device profile defined for the switch's IP address. Without a network device profile, CPPM would not recognize authentication attempts coming from the switch and would not process them, resulting in no logs in Access Tracker.
The other options are incorrect because:
Users logging in with the wrong credentials would still generate an attempt record in Access Tracker.
Clients configured to use a mismatched EAP method would also generate an attempt record in Access Tracker.
Clients not configured to trust the root CA certificate for CPPM's RADIUS/EAP certificate might fail authentication, but the attempt would still be logged in Access Tracker.
NEW QUESTION # 36
You are configuring ArubaOS-CX switches to tunnel client traffic to an Aruba Mobility Controller (MC).
What should you do to enhance security for control channel communications between the switches and the MC?
Answer: C
Explanation:
When configuring ArubaOS-CX switches to tunnel client traffic to an Aruba Mobility Controller (MC), securing the control channel communications is crucial to prevent unauthorized access and ensure data integrity. Option B is the correct answer as it involves configuring a long, random PAPI security key that matches on both the switches and the MC. The PAPI (Policy Access Point Interface) protocol is used for secure communication between Aruba devices, and employing a robust, randomized security key significantly enhances the security of the control channel. This setup prevents potential interception or manipulation of the control traffic between the devices.
References:
ArubaOS-CX Security Configuration Guide
Aruba Networks Official Documentation
NEW QUESTION # 37
What is one benefit of a Trusted Platform Module (TPM) on an Aruba AP?
Answer: A
Explanation:
The TPM (Trusted Platform Module) is a hardware-based security feature that can provide various security functions, one of which includes secure boot. Secure boot is a process where the TPM ensures that the device boots using only software that is trusted by the manufacturer. If the OS has been tampered with or infected with malware, the secure boot process can detect this and prevent the system from loading the compromised OS.
NEW QUESTION # 38
What is a benefit of deploying Aruba ClearPass Device insight?
Answer: B
NEW QUESTION # 39
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