HP Designing Aruba Solutions HPE6-A47 Exam Dumps: Updated Questions & Answers (October 2025)

 References:https://www.arubanetworks.com/assets/ds/DS_7200Series.pdf

Aruba Mobility Controller Data Sheet (Aruba Networks)

Designing Aruba Solutions Study Guide (HPE Press)

Jitter is the variation in the delay of packets arriving at the destination. It is caused by network congestion, routing changes, or other factors that affect the transmission quality. Jitter can affect the quality of VoIP calls, as it can cause gaps, distortion, or echo in the audio. According to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum jitter for VoIP calls is 30 ms. Therefore, a jitter of 100 ms would typically cause a poor experience for users.

The other options are incorrect because:

A. The packet loss is the percentage of packets that are lost or discarded during transmission. Packet loss can affect the quality of VoIP calls, as it can cause missing or corrupted audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum packet loss for VoIP calls is 1 percent. Therefore, a packet loss of 0.3 percent would not typically cause a poor experience for users.

B. The throughput is the amount of data that can be transferred per unit of time. Throughput can affect the quality of VoIP calls, as it determines the bandwidth available for the audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the typical throughput for VoIP calls is 64 Kbps. Therefore, a throughput of 67 Kbps would not typically cause a poor experience for users.

C. The latency is the delay between the sender and the receiver of packets. Latency can affect the quality of VoIP calls, as it can cause delays or out-of-sync audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum latency for VoIP calls is 150 ms. Therefore, a latency of 100 ms would not typically cause a poor experience for users.

References:

Aruba Validated Reference Design: Voice and Video over Wi-Fi - Chapter 2)

Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47) - Chapter 7)

DSCP (Differentiated Services Code Point) is a method of marking network packets with different priorities based on the type of traffic they carry. DSCP values range from 0 to 63, with higher values indicating higher priority. DSCP values are typically mapped to one of the four WMM (Wi-Fi Multimedia) queues, which are used to prioritize wireless traffic on the access points and controllers. WMM queues are: voice, video, best effort, and background12.

The default QoS settings for Aruba APs and controllers map the DSCP values to the WMM queues as follows3:

Table

DSCP Value

WMM Queue

0-7

Background

8-23

Best Effort

24-39

Video

40-63

Voice

According to these settings, the DSCP values 46 and 34, which are assigned to voice and video traffic by Windows policies, will both be mapped to the video WMM queue. This means that both types of traffic will receive the same priority, and voice traffic will not receive the highest priority that it should. This can result in poor voice quality, increased latency, jitter, or packet loss, especially when the network is congested or bandwidth is limited. Voice traffic is more sensitive to these factors than video traffic, and requires strict QoS to ensure optimal performance and user experience4.

To avoid this potential issue, the architect should explain to the customer that they need to modify the QoS settings on the Aruba APs and controllers to match the DSCP values assigned by Windows policies. This can be done by using the following commands on the Aruba controller3:

(config) #wmm traffic-management-profile voice

(config) #dscp 46

(config) #wmm traffic-management-profile video

(config) #dscp 34

These commands will map the DSCP value 46 to the voice WMM queue, and the DSCP value 34 to the video WMM queue, ensuring that voice traffic receives the highest priority and video traffic receives the second highest priority. This will improve the QoS for the Skype for Business UC solution and enhance the end-user experience.

References:

1: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/qos.htm

2: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/wmm.htm

3: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/qos-mapping.htm

4: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/qos-voice.htm

 A metal firewall is a significant RF obstacle that can be difficult to see visually and might require access to blueprints. A metal firewall is a type of fire-resistant barrier that is made of metal or metal-clad materials and is used to separate different sections of a building or a network. A metal firewall can block or attenuate RF signals that pass through it, causing coverage gaps, signal degradation, or interference in the wireless deployment. A metal firewall can also reflect RF signals, creating multipath fading or distortion in the wireless environment. Therefore, an architect needs to identify the location and thickness of any metal firewalls in the building and account for their impact on the RF design. A metal firewall may require additional access points, antennas, or cabling to provide adequate coverage and performance across the wireless deployment. A metal firewall may also affect the channel planning, transmit power settings, and antenna orientation of the access points and radios. A metal firewall can be difficult to see visually, as it may be hidden behind walls, ceilings, or floors, or blended with other materials.Therefore, an architect might need access to blueprints or other sources of information to locate and measure any metal firewalls in the building. References:

RF Design | Validated Solution Guide - Aruba

Managing and Optimizing RF Spectrum for Aruba WLANs | PDF - SlideShare

RF Optimization - Aruba

Advanced RF Design & Troubleshooting | PPT - SlideShare

The IRIS BOM is missing stacking modules and cables for the Aruba 2930M switches. The customer wants to flatten the architecture and avoid recabling, but also maintain connectivity to the core if one link fails. To achieve this, the architect proposed to combine the switches in each Building 2 closet as a VSF fabric and establish two 10 GbE connections to the core per fabric. However, to create a VSF fabric, the switches need to have stacking modules and cables to interconnect them. The IRIS BOM does not include these items, which are required for the VSF configuration. The part numbers for the stacking modules and cables are JL325A and J9735A, respectively.

The other options are not missing from the IRIS BOM because they are either not required or already included. Stacking licenses are not required for the Aruba 2930M switches, as they support VSF natively. 10 GbE direct attach cables are already included in the IRIS BOM as part number J9283D. An uplink module for one of the switches is not required, as the customer already has enough fiber strands to connect each switch to the core. References:

Aruba 2930M Switch Series Data Sheet (Aruba Networks)

Designing Aruba Solutions Study Guide (HPE Press)

The customer wants to use certificates to authenticate user devices, which means that they need a strong and secure method of verifying the identity of the devices that connect to the employee WLAN. The best option for this is to use EAP-TLS instead of PEAP-MSCHAPv2. EAP-TLS stands for Extensible Authentication Protocol-Transport Layer Security, and it is a protocol that uses certificates on both the client and the server side to establish a mutual authentication and a secure channel for data exchange. EAP-TLS is considered the most secure EAP method, as it prevents common attacks such as dictionary attacks, man-in-the-middle attacks, and replay attacks.

The other options are not suitable for the customer requirements:

Option B is incorrect because TKIP encryption is weaker than AES encryption. TKIP stands for Temporal Key Integrity Protocol, and it is an older encryption method that was designed to replace WEP, which had serious security flaws. However, TKIP also has some vulnerabilities, and it is not recommended for modern WLANs. AES stands for Advanced Encryption Standard, and it is a newer and stronger encryption method that provides better security and performance for WLANs.

Option C is incorrect because WPA2-PSK is less secure than WPA2-Enterprise. WPA2-PSK stands for Wi-Fi Protected Access 2-Pre-Shared Key, and it is a security mode that uses a common passphrase or key to authenticate all devices that connect to the WLAN. However, this passphrase or key can be easily compromised or shared, and it does not provide individual authentication or encryption for each device. WPA2-Enterprise stands for Wi-Fi Protected Access 2-Enterprise, and it is a security mode that uses a RADIUS server to authenticate each device individually and dynamically generate encryption keys for each session. WPA2-Enterprise provides better security and scalability for WLANs.

Option D is incorrect because TTLS does not use certificates to authenticate user devices. TTLS stands for Tunneled Transport Layer Security, and it is a protocol that uses certificates only on the server side to establish a secure tunnel for data exchange. The client side can use different methods to authenticate, such as passwords, tokens, or certificates. However, TTLS does not require certificates on the client side, and it is less secure than EAP-TLS.

References:

ArubaOS 8.5 User Guide)

ArubaOS 8.5 Security Guide)

Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47))

The specifications for the AP models are in the format of Tx:Rx:SU-MIMO:MU-MIMO:MU-MIMO clients, where Tx is the number of transmit antennas, Rx is the number of receive antennas, SU-MIMO is the number of spatial streams supported in single-user MIMO mode, MU-MIMO is the number of spatial streams supported in multi-user MIMO mode, and MU-MIMO clients is the number of MU-MIMO clients that can be served simultaneously.

The customer requirements are:

Support for MU-MIMO: This means the AP must have a MU-MIMO value greater than 1, as MU-MIMO is a technique that allows multiple spatial streams to be transmitted to different clients at the same time.

Support for up to four spatial streams, both when MU-MIMO is used and when it is not used: This means the AP must have a SU-MIMO value and a MU-MIMO value of 4, as spatial streams are independent data streams that can be transmitted or received by an antenna.

Support for transmissions to up to three MU-MIMO clients at the same time: This means the AP must have a MU-MIMO clients value of 3, as this indicates the maximum number of clients that can receive MU-MIMO transmissions from the AP at the same time.

Based on these criteria, only the AP 335 meets the customer requirements, as it has a specification of 4x4:4:4:4:3, which means it has 4 transmit and receive antennas, 4 spatial streams in both SU-MIMO and MU-MIMO modes, and can serve 3 MU-MIMO clients simultaneously. The AP 325 does not meet the customer requirements, as it has a specification of 4x4:4:4:3:3, which means it has only 3 spatial streams in MU-MIMO mode, and can only serve 2 MU-MIMO clients simultaneously.

References:

Aruba AP-335 Wireless Access Point | Aruba

Aruba AP-325 Wireless Access Point | Aruba

Multi-User MIMO in WiFi 6 - Arista Networks

The minimum acceptable signal for an active site survey depends on the type of applications and the data rates that the users require. For 802.11ac, which operates in the 5 GHz band, Aruba recommends a signal of -65 dBm or better for high-performance applications such as voice and video, and a signal of -72 dBm or better for basic applications such as Web and email1. These values are based on the receiver sensitivity of typical 802.11ac clients and the expected signal-to-noise ratio (SNR) for different modulation and coding schemes (MCS). A higher SNR means a higher data rate and a better user experience.

Therefore, the architect should look for a signal of -65 dBm in the 5 GHz band to determine the test AP range for 802.11ac, assuming that the users run high-performance applications. A signal of -75 dBm in the 5 GHz band might be too weak to support the desired data rates and quality of service. A signal of -65 dBm or -75 dBm in the 2.4 GHz band is irrelevant for 802.11ac, as it does not operate in that band.

References:

Aruba Validated Reference Design: 802.11ac Networks

Best Practices for Monitoring and Troubleshooting 802.11ac Networks

This answer is correct because it follows the best practice design for routing the wireless traffic in a VHD wireless solution. By having the MCs act at Layer2, the architectcan enable the use of clustering, which provides high availability, load balancing, and seamless roaming for wireless users. By having the core routing switches act as the default gateway, the architect can avoid tunneling the wireless traffic to the MCs, which reduces the network overhead and latency. This also allows the core routing switches to apply security policies and QoS to the wireless traffic based on the user roles assigned by the MCs. References:

Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47) - Chapter 6)

Aruba Validated Reference Design: Very High Density 802.11ac Networks - Chapter 4)

Aruba Mobility Controller Clustering - Data sheet)

 The correct answer is option C, voice. Voice applications have the greatest potential impact on RF design because they are sensitive to latency, jitter, and packet loss. Voice applications also require a minimum signal strength and signal-to-noise ratio to ensure good voice quality. Therefore, an architect needs to consider the number of voice devices, the codec used, the roaming behavior, and the call admission control when planning the RF coverage for voice applications. References: The information can be referenced from the official HPE documents and learning materials available on HPE Press and Aruba Networks. Specifically, it aligns with the objectives outlined in Chapter 3: Wireless LAN Technologies and Standards, where the RF design considerations for voice applications are discussed. Designing Aruba Solutions Official Certification Study Guide Aruba Mobility Fundamentals Guide