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HP Aruba Certified Network Security Associate Exam Sample Questions (Q152-Q157):

NEW QUESTION # 152
Refer to the exhibit.

This company has ArubaOS-Switches. The exhibit shows one access layer switch, Swllcn-2. as an example, but the campus actually has more switches. The company wants to slop any internal users from exploiting ARP What Is the proper way to configure the switches to meet these requirements?

A. On Swltch-2, configure static PP-to-MAC bindings for all end-user devices on the network
B. On Swltch-2, enable DHCP snooping globally and on VLAN 201 before enabling ARP protection
C. On Switch-2, make ports connected to employee devices trusted ports for ARP protection
D. On Switch-1, enable ARP protection globally, and enable ARP protection on ail VLANs.

Answer: B

Explanation:
To prevent users from exploiting Address Resolution Protocol (ARP) on a network with ArubaOS-Switches, the correct approach would be to enable DHCP snooping globally and on VLAN 201 before enabling ARP protection, as stated in option C. DHCP snooping acts as a foundation by tracking and securing the association of IP addresses to MAC addresses. This allows ARP protection to function effectively by ensuring that only valid ARP requests and responses are processed, thus preventing ARP spoofing attacks.
Trusting ports that connect to employee devices directly could lead to bypassing ARP protection if those devices are compromised.
The company's goal is to prevent internal users from exploiting ARP within their ArubaOS-Switch network.
Let's break down the options:
Option A (Incorrect): Enabling ARP protection globally on Switch-1 and all VLANs is not the best approach. ARP protection should be selectively applied where needed, not globally. It's also not clear why Switch-1 is mentioned when the exhibit focuses on Switch-2.
Option B (Incorrect): Making ports connected to employee devices trusted for ARP protection is a good practice, but it's not sufficient by itself. Trusted ports allow ARP traffic, but we need an additional layer of security.
Option C (Correct): This is the recommended approach. Here's why:
DHCP Snooping: First, enable DHCP snooping globally. DHCP snooping helps validate DHCP messages and builds an IP-MAC binding table. This table is crucial for ARP protection to function effectively.
VLAN 201: Enable DHCP snooping specifically on VLAN 201 (as shown in the exhibit). This ensures that DHCP messages within this VLAN are validated.
ARP Protection: Once DHCP snooping is in place, enable ARP protection. ARP requests/replies from untrusted ports with invalid IP-to-MAC bindings will be dropped. This prevents internal users from exploiting ARP for attacks like man-in-the-middle.
Option D (Incorrect): While static ARP bindings can enhance security, they are cumbersome to manage and don't dynamically adapt to changes in the network.
References:
ArubaOS-Switch Management and Configuration Guide for WB_16_10 - Chapter 15: IP Routing Features Aruba Security Guide

NEW QUESTION # 153
An organization has HPE Aruba Networking infrastructure, including AOS-CX switches and an AOS-8 mobility infrastructure with Mobility Controllers (MCs) and APs. Clients receive certificates from ClearPass Onboard. The infrastructure devices authenticate clients to ClearPass Policy Manager (CPPM). The company wants to start profiling clients to take their device type into account in their access rights.
What is a role that CPPM should play in this plan?

A. Assigning clients to their device categories
B. Enforcing access control decisions
C. Helping to forward profiling information to the component responsible for profiling
D. Accepting and enforcing CoA messages

Answer: A

Explanation:
HPE Aruba Networking ClearPass Policy Manager (CPPM) is a network access control (NAC) solution that provides device profiling, authentication, and policy enforcement. In this scenario, the company wants to profile clients to determine their device type and use that information to define access rights. Device profiling in ClearPass involves identifying and categorizing devices based on various attributes, such as DHCP fingerprints, HTTP User-Agent strings, or TCP fingerprinting, to assign them to specific device categories (e.g., Windows, macOS, IoT devices, etc.). These categories can then be used in policy decisions to grant or restrict access.
Option A, "Assigning clients to their device categories," directly aligns with ClearPass's role in device profiling. ClearPass collects profiling data from network devices (like APs, MCs, or switches) and uses its profiling engine to categorize devices. This categorization is a core function of ClearPass Device Insight, which is integrated into CPPM, and is used to build policies based on device type.
Option B, "Helping to forward profiling information to the component responsible for profiling," is incorrect because ClearPass itself is the component responsible for profiling. It doesn't forward data to another system for profiling; instead, it collects data (e.g., via DHCP snooping, HTTP headers, or mirrored traffic) and processes it internally.
Option C, "Accepting and enforcing CoA messages," refers to ClearPass's ability to send Change of Authorization (CoA) messages to network devices to dynamically change a client's access rights (e.g., reassign a role or disconnect a session). While CoA is part of ClearPass's enforcement capabilities, it is not directly related to the profiling process or categorizing devices.
Option D, "Enforcing access control decisions," is a broader function of ClearPass. While ClearPass does enforce access control decisions based on profiling data (e.g., by assigning roles or VLANs), the question specifically asks about its role in the profiling process, not the enforcement step that follows.
The HPE Aruba Networking ClearPass Policy Manager 6.11 User Guide states:
"ClearPass Policy Manager provides a mechanism to profile devices that connect to the network. Device profiling collects information about a device during its authentication or through network monitoring (e.g., DHCP, HTTP, or SNMP). The collected data is used to identify and categorize the device into a device category (e.g., Computer, Smartphone, Printer, etc.) and device family (e.g., Windows, Android, etc.). These categories can then be used in policy conditions to enforce access control." (Page 245, Device Profiling Section) Additionally, the ClearPass Device Insight Data Sheet notes:
"ClearPass Device Insight uses a combination of passive and active profiling techniques to identify and classify devices. It assigns devices to categories based on their attributes, enabling organizations to create granular access policies." (Page 2)
:
HPE Aruba Networking ClearPass Policy Manager 6.11 User Guide, Device Profiling Section, Page 245.
ClearPass Device Insight Data Sheet, Page 2.

NEW QUESTION # 154
Refer to the exhibit.

You are deploying a new ArubaOS Mobility Controller (MC), which is enforcing authentication to Aruba ClearPass Policy Manager (CPPM). The authentication is not working correctly, and you find the error shown In the exhibit in the CPPM Event Viewer.
What should you check?

A. that the snared secret configured for the CPPM authentication server matches the one defined for the device on CPPM
B. that the MC has been added as a domain machine on the Active Directory domain with which CPPM is synchronized
C. that the MC has valid admin credentials configured on it for logging into the CPPM
D. that the IP address that the MC is using to reach CPPM matches the one defined for the device on CPPM

Answer: D

Explanation:
Given the error message from the ClearPass Policy Manager (CPPM) Event Viewer, indicating a RADIUS authentication attempt from an unknown Network Access Device (NAD), you should check that the IP address the Mobility Controller (MC) is using to communicate with CPPM matches the IP address defined for the MC in the CPPM's device inventory. If there is a mismatch in IP addresses, CPPM will not recognize the MC as a known device and will not process the authentication request, leading to the error observed.
:
ClearPass Policy Manager documentation on device management.

NEW QUESTION # 155
What is a guideline for managing local certificates on AOS-CX switches?

A. Install an Online Certificate Status Protocol (OCSP) certificate to simplify the process of enrolling and re-enrolling for certificates.
B. Understand that the switch must use the same certificate for all usages, such as its HTTPS server and RadSec client.
C. Before installing the local certificate, create a trust anchor (TA) profile with the root CA certificate for the certificate that you will install.
D. Create a self-signed certificate online on the switch because AOS-CX switches do not support CA-signed certificates.

Answer: C

Explanation:
AOS-CX switches use certificates for various purposes, such as securing HTTPS access to the switch's web interface, authenticating the switch as a RadSec client, or securing other communications. Managing local certificates on AOS-CX switches involves ensuring that the switch trusts the certificate authority (CA) that issued the certificate, which is critical for proper operation.
Option C, "Before installing the local certificate, create a trust anchor (TA) profile with the root CA certificate for the certificate that you will install," is correct. A trust anchor (TA) profile on AOS-CX switches contains the root CA certificate (or intermediate CA certificate) that issued the local certificate. This TA profile allows the switch to validate the certificate chain when the local certificate is installed. For example, if you install a CA-signed certificate for the HTTPS server, the switch needs the root CA certificate in a TA profile to trust the certificate. This is a standard guideline for certificate management on AOS-CX switches to ensure secure and proper operation.
Option A, "Understand that the switch must use the same certificate for all usages, such as its HTTPS server and RadSec client," is incorrect. AOS-CX switches support using different certificates for different purposes. For example, you can have one certificate for the HTTPS server and another for RadSec client authentication, as long as each certificate is associated with the appropriate service and trusted by the switch.
Option B, "Create a self-signed certificate online on the switch because AOS-CX switches do not support CA-signed certificates," is incorrect. AOS-CX switches fully support CA-signed certificates, and using CA-signed certificates is recommended for production environments to ensure trust and security. Self-signed certificates can be used for testing but are not a guideline for general certificate management.
Option D, "Install an Online Certificate Status Protocol (OCSP) certificate to simplify the process of enrolling and re-enrolling for certificates," is incorrect. OCSP is a protocol used to check the revocation status of certificates, not to simplify certificate enrollment. AOS-CX switches support OCSP for certificate validation, but installing an "OCSP certificate" is not a concept in certificate management, and it's not a guideline for managing local certificates.
The HPE Aruba Networking AOS-CX 10.12 Security Guide states:
"Before installing a CA-signed local certificate on the switch, you must create a trust anchor (TA) profile that includes the root CA certificate (or intermediate CA certificate) that issued the local certificate. This ensures that the switch can validate the certificate chain. For example, to install a CA-signed certificate for the HTTPS server, use the command crypto pki ta-profile <profile-name> to create the TA profile, and then import the root CA certificate into the profile using crypto pki import ta-profile <profile-name>. Then, install the local certificate using crypto pki import local-certificate <certificate-name> and associate it with the HTTPS server." (Page 201, Certificate Management Section) Additionally, the guide notes:
"AOS-CX switches support both self-signed and CA-signed certificates. For production environments, it is recommended to use CA-signed certificates and ensure that the appropriate trust anchor profiles are configured to validate the certificate chain." (Page 202, Best Practices Section)
:
HPE Aruba Networking AOS-CX 10.12 Security Guide, Certificate Management Section, Page 201.
HPE Aruba Networking AOS-CX 10.12 Security Guide, Best Practices Section, Page 202.

NEW QUESTION # 156
Refer to the exhibit.

A company has an Aruba Instant AP cluster. A Windows 10 client is attempting to connect a WLAN that enforces WPA3-Enterprise with authentication to ClearPass Policy Manager (CPPM). CPPM is configured to require EAP-TLS. The client authentication fails. In the record for this client's authentication attempt on CPPM, you see this alert.
What is one thing that you check to resolve this issue?

A. whether EAP-TLS is enabled in the AAA Profile settings for the WLAN on the IAP cluster
B. whether the client has a third-party 802.1 X supplicant, as Windows 10 does not support EAP-TLS
C. whether the client has a valid certificate installed on it to let it support EAP-TLS
D. whether EAP-TLS is enabled in the SSID Profile settings for the WLAN on the IAP cluster

Answer: C

Explanation:
In the context of WPA3-Enterprise with EAP-TLS authentication, the error message "Client doesn't support configured EAP methods" suggests that the client is not able to complete the EAP-TLS authentication process. EAP-TLS requires that both the server (in this case, CPPM) and the client have a valid certificate for mutual authentication. Windows 10 does support EAP-TLS natively, so options A, C, and D can be ruled out.
The most likely reason for the authentication failure is that the client device does not have the correct client certificate installed, which is required to establish a TLS session with the server. Therefore, ensuring that the client has a valid certificate installed that matches the server's requirements is the correct step to resolve this issue.

NEW QUESTION # 157
......

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