HPE4-A50 Sample Questions & Answers
Protecting and defending the network makes up over half the test, built on zero-trust principles and PKI standards plus ecosystem-partner integration, ahead of remediating risk and monitoring behavior, a written log of activities, and threat analysis.
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- Question 1Advanced
Analyze · Use HPE Aruba Networking solutions to log issues and monitor behavior
You are creating a Network Analytics Engine (NAE) script on an Aruba CX switch to monitor for potential ARP spoofing attacks. The script should trigger an alert if the rate of ARP changes for a specific IP address exceeds a threshold. Which NAE specific database resource should your script monitor to detect this behavior?
Show answer & explanation
Correct answer: B
In the AOS-CX REST API and NAE database structure, ARP table information is typically found under the L3/Neighbors/ARP path (or similar depending on exact version, but 'Neighbors' is the key resource for ARP entries). Monitoring changes in this resource allows the script to track MAC address associations for IPs.
- Question 2Beginner
Protect and Defend · Design and deploy Gateway IDS/IPS
True or False: When configuring a Gateway IDS/IPS policy on an Aruba 9004 Gateway in an AOS 10 environment, you must enable 'Fail-Open' mode to ensure traffic continues to flow even if the IPS engine becomes overloaded or fails.
Show answer & explanation
Correct answer: A
True. In production environments where availability is critical, 'Fail-Open' is the standard best practice configuration. It ensures that if the IDS/IPS inspection engine fails or is overwhelmed, traffic is permitted to pass through without inspection rather than dropping all traffic (Fail-Close), which would cause a network outage.
- Question 3Advanced
Protect and Defend · Implement role-based access control
During a practical exam task, you are asked to configure a downloadable user role (DUR) on ClearPass for an Aruba CX switch. You need to ensure that the role places the user into VLAN 20 and applies a specific ACL named 'RESTRICT_HR'. Which syntax represents the correct format for the DUR content returned by ClearPass for an AOS-CX device?
Show answer & explanation
Correct answer: A
AOS-CX uses a structured configuration format for DURs. The content typically defines the role context and then its attributes. The correct syntax involves 'port-access role', setting the 'vlan access', and associating the policy (ACL). The syntax is distinct from the older AOS 8 style.
- Question 4Advanced
Protect and Defend · Design enterprise-wide firewall policies
Case Study:
Company Background
TechGlobal Inc. is a software development firm with a high-security requirement. They are deploying an Aruba wireless network managed by a Mobility Conductor and two Mobility Controllers. They utilize ClearPass for authentication.Scenario
The security team has detected that several developers are bypassing the corporate proxy by tunneling traffic over DNS (port 53) to external non-approved servers. This 'DNS Tunneling' must be stopped immediately. The Chief Information Security Officer (CISO) wants a solution that can identify this specific application behavior and block it without blocking legitimate DNS traffic to the corporate DNS servers (10.10.10.5 and 10.10.10.6).Requirements
- Identify DNS tunneling traffic.
- Block the tunneling traffic.
- Allow legitimate DNS queries to corporate servers.
Which configuration strategy on the Aruba Mobility Controllers best addresses this need?
Show answer & explanation
Correct answer: A
Aruba's AppRF with Deep Packet Inspection (DPI) can distinguish between legitimate DNS traffic and DNS tunneling behavior (which often uses non-standard payload sizes or query types). A simple L4 ACL might block the destination, but if tunneling is directed at a permitted server (unlikely but possible) or if dynamic IPs are used, L4 is insufficient. AppRF specifically identifies the 'application' behavior of tunneling, providing the most precise mitigation as requested by the CISO.
- Question 5Intermediate
Written Items · Identify key important information from the log of your activities in the practical exam
You are reviewing the 'Access Tracker' in ClearPass Policy Manager after a failed 802.1X authentication attempt by a Windows laptop. The alert message displays: 'Client did not complete EAP transaction'. The detailed logs show that the client stopped communicating after the server sent its certificate. What is the most likely cause of this issue?
Show answer & explanation
Correct answer: B
In EAP-PEAP or EAP-TLS, the server presents its certificate to the client early in the handshake. If the client does not trust the issuer (Root CA) of that certificate, it will silently drop the connection or send an alert and stop the process. This typically results in a 'Client did not complete EAP transaction' or 'Timeout' error in Access Tracker because the client refused to proceed.
- Question 6Intermediate
Protect and Defend · Integrate HPE Aruba Networking solutions with ecosystem partner solutions
An organization requires that any guest user who connects to the 'Guest' SSID must be scanned for vulnerabilities before being allowed full internet access. You have integrated ClearPass with a vulnerability scanner. Which ClearPass feature allows you to trigger a scan upon authentication and then change the user's access level based on the scan result?
Show answer & explanation
Correct answer: A
ClearPass Exchange allows integration with third-party systems via REST APIs. You can configure an HTTP-based action to trigger the scan upon successful authentication. Once the scanner (ecosystem partner) completes the scan, it can send a webhook back to ClearPass, which then triggers a Change of Authorization (CoA) to update the user's role/access based on the result.
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