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Question 1

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Which frequency bands are supported by Wi-Fi 6E (802.11ax extended) Aruba access points such as the AP-635?

2.4 GHz only

2.4 GHz and 5 GHz only

2.4 GHz, 5 GHz, and 6 GHz

5 GHz and 6 GHz only

to track

2026 Statistics

Key Facts: Aruba ACMA Exam

Exam Questions

HPE Aruba

90 min

Exam Duration

HPE Aruba

63-65%

Passing Score

HPE Aruba

$200

Exam Fee

HPE Aruba

3 yrs

Certification Validity

HPE Aruba

HPE6-A72

Exam Code

HPE Aruba

The Aruba Certified Mobility Associate (ACMA) is HPE Aruba's entry-level WLAN mobility certification. It validates installation, configuration, and basic operation of Aruba access points and Mobility Controllers running ArubaOS. The exam covers WLAN RF, AP families, Mobility Master architecture, virtual APs, SSID security (WPA2/3/OWE), AAA profiles and user roles, captive portal, ARM, ClientMatch, WIDS/WIPS, and ArubaOS CLI troubleshooting.

Sample Aruba ACMA Practice Questions

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1Which frequency bands are supported by Wi-Fi 6E (802.11ax extended) Aruba access points such as the AP-635?

A.2.4 GHz only

B.2.4 GHz and 5 GHz only

C.2.4 GHz, 5 GHz, and 6 GHz

D.5 GHz and 6 GHz only

Explanation: Wi-Fi 6E extends 802.11ax operation into the 6 GHz band (5.925-7.125 GHz in many regions) while still supporting the legacy 2.4 GHz and 5 GHz bands. Aruba tri-radio APs in the 6xx series, such as the AP-635, include radios for all three bands. The 6 GHz band offers significantly more spectrum and avoids legacy device contention.

2How many non-overlapping 20 MHz channels are available in the 2.4 GHz band in North America?

A.3

B.4

C.11

D.13

Explanation: In North America the 2.4 GHz band has channels 1 through 11 available, but only channels 1, 6, and 11 are non-overlapping at 20 MHz width. Aruba ARM defaults to selecting from these three channels in 2.4 GHz to minimize co-channel interference. Other channels overlap and degrade throughput in dense deployments.

3What does the term EIRP stand for in wireless RF planning?

A.Effective Internal Radio Power

B.Equivalent Isotropically Radiated Power

C.Extended Indoor RF Pattern

D.Estimated Interference Reception Probability

Explanation: EIRP (Equivalent Isotropically Radiated Power) is the total power radiated by an antenna system, calculated as transmit power (dBm) plus antenna gain (dBi) minus cable loss. Regulatory domains cap EIRP per channel, and Aruba ARM enforces these limits when selecting transmit power. EIRP, not raw transmit power, determines actual RF coverage.

4An AP transmits at 18 dBm with a 5 dBi antenna and negligible cable loss. What is the EIRP?

A.13 dBm

B.18 dBm

C.23 dBm

D.90 dBm

Explanation: EIRP equals transmit power plus antenna gain minus cable losses: 18 dBm + 5 dBi = 23 dBm. Decibels are logarithmic, so values are added, not multiplied. Verify the result against the regulatory EIRP cap for the channel before deployment, especially in 5 GHz UNII bands where some channels limit indoor EIRP.

5Which RSSI value typically represents a strong, usable Wi-Fi signal at the client?

A.-30 dBm

B.-65 dBm

C.-85 dBm

D.-95 dBm

Explanation: RSSI is expressed as a negative dBm value where values closer to zero are stronger. A reading of -30 dBm is extremely strong (very close to the AP), while -65 dBm is good, -75 dBm is marginal, and -85 dBm or lower usually causes connectivity problems. Aruba design targets typically aim for -65 dBm or better at the cell edge for voice and modern data.

6What is SNR in a wireless context, and why does it matter for client throughput?

A.Service Name Routing — controls SSID broadcast

B.Signal-to-Noise Ratio — the gap between received signal and noise floor

C.Secure Network Resolver — DNS used by RAPs

D.Subnet Network Range — IP scope for VLAN

Explanation: SNR (Signal-to-Noise Ratio) is the difference in dB between the received signal level and the background noise floor. Higher MCS rates require higher SNR to be sustained, so a strong signal in a noisy environment can still deliver poor throughput. Aruba design typically targets 25 dB SNR or better at the cell edge for high data rates.

7Which 802.11 amendment introduced High Efficiency (HE) features and is marketed as Wi-Fi 6?

A.802.11n

B.802.11ac

C.802.11ax

D.802.11be

Explanation: 802.11ax is marketed as Wi-Fi 6 (and Wi-Fi 6E when used in 6 GHz). It introduces OFDMA, uplink MU-MIMO, BSS coloring, and target wake time (TWT) to increase efficiency in dense deployments. 802.11n was Wi-Fi 4, 802.11ac was Wi-Fi 5, and 802.11be is Wi-Fi 7.

8Which 802.11 amendment is marketed as Wi-Fi 7 and supported by newer Aruba 700-series APs?

A.802.11ac

B.802.11ax

C.802.11be

D.802.11ay

Explanation: 802.11be is the IEEE designation for Wi-Fi 7, supporting 320 MHz channels in 6 GHz, 4096-QAM, and Multi-Link Operation (MLO). Aruba's 700-series APs (such as the AP-735) implement Wi-Fi 7 features. 802.11ay is a 60 GHz millimeter-wave standard, not the standard mainline Wi-Fi.

9Wider 80 MHz or 160 MHz channels improve throughput but have which significant trade-off in 5 GHz?

A.They reduce range and increase the chance of co-channel interference

B.They are illegal in all regulatory domains

C.They only work in the 2.4 GHz band

D.They disable beamforming on Aruba APs

Explanation: Wider channels concentrate the same transmit power across more spectrum, reducing per-Hz signal density and effective range. They also consume more of the available 5 GHz spectrum, increasing the likelihood of co-channel interference in dense deployments. Aruba commonly recommends 40 MHz channels in 5 GHz for high-density designs.

10What does MCS stand for in 802.11 wireless?

A.Multi-Channel Spectrum

B.Modulation and Coding Scheme

C.Mobility Conductor Setting

D.Maximum Client Sessions

Explanation: MCS (Modulation and Coding Scheme) is an index that defines the modulation type, coding rate, and number of spatial streams used for an 802.11 transmission. Higher MCS values yield higher data rates but require better SNR to be sustained. Aruba clients dynamically rate-shift between MCS values based on current link conditions.

About the Aruba ACMA Exam

The Aruba Certified Mobility Associate (ACMA, exam HPE6-A72) validates foundational ArubaOS mobility skills, including WLAN RF, Aruba APs, Mobility Master/Mobility Controller, virtual APs, SSID security, AAA roles, ARM, ClientMatch, WIDS, and CLI troubleshooting. The credential is being rebranded as Aruba Certified Associate – Campus Access (ACA-CA).

Questions

100 scored questions

Time Limit

90 minutes

Passing Score

63-65%

Exam Fee

$200 (HPE Aruba / Pearson VUE)

Aruba ACMA Exam Content Outline

13%

WLAN RF Fundamentals

2.4/5/6 GHz bands, channels, channel widths, dBm/dBi/EIRP, RSSI, SNR, MCS, MIMO, and 802.11n/ac/ax/be

17%

Aruba APs & Mobility Architecture

AP families (5xx/6xx/7xx, indoor/outdoor/hardened), antennas, MM/MC, AP groups, and virtual APs

10%

AP Discovery & Modes

DHCP option 43/60, DNS aruba-master, ADP discovery, and CAP/RAP/IAP/Mesh/AM modes

20%

AAA, Roles & SSID Security

AAA profiles, server groups, ClearPass, user roles, firewall policies, WPA2/3, OWE, and 802.1X

13%

Guest, AirGroup & Licensing

Captive portal, ClearPass Guest, AirGroup mDNS proxy, and PEFNG/RFProtect/ACR/WebCC licenses

13%

ARM, ClientMatch & L3 Mobility

ARM channel/EIRP, band steering, airtime fairness, ClientMatch, and L3 mobility domains

14%

Monitoring, WIDS & Troubleshooting

Aruba Central, AirWave, syslog, SNMP, rogue containment, and show ap database/active/client/user commands

How to Pass the Aruba ACMA Exam

What You Need to Know

Passing score: 63-65%
Exam length: 100 questions
Time limit: 90 minutes
Exam fee: $200

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

Aruba ACMA Study Tips from Top Performers

1Memorize Aruba AP families and their Wi-Fi generations: 5xx = Wi-Fi 6, 6xx = Wi-Fi 6E, 7xx = Wi-Fi 7, with outdoor variants in the 5x5/575/635 lines

2Know the AP boot/discovery chain cold: DHCP option 60 (ArubaAP) and option 43 first, then DNS aruba-master, then ADP broadcast

3Understand the configuration hierarchy: SSID profile + AAA profile + forwarding mode + VLAN = virtual AP, attached to an AP group

4Practice show ap database, show ap active, show client, show user, show role, show dot11r commands until they are reflexive

5Be clear on license purposes: PEFNG (firewall/DPI), RFProtect (WIPS containment), WebCC (URL filtering), ACR (Suite B crypto), MM (Mobility Master)

Frequently Asked Questions

What is the Aruba ACMA exam format?

The exam (HPE6-A72) has approximately 60 multiple-choice and multiple-response questions delivered in 90 minutes at a Pearson VUE test center. The passing score is in the 63-65% range. Questions cover WLAN RF, Aruba APs, Mobility Master, AAA, ARM, WIDS, and ArubaOS CLI.

Is ACMA being renamed?

Yes. HPE is rebranding ACMA as Aruba Certified Associate – Campus Access (ACA-CA). The exam code (HPE6-A72) and content are essentially unchanged. Materials and study resources for ACMA remain valid for the new ACA-Campus Access exam.

What background do I need before taking ACMA?

There are no formal prerequisites, but HPE recommends about six months of WLAN deployment experience with Aruba products and completion of the Implementing Aruba WLAN (IAW) course. Solid TCP/IP and DHCP fundamentals are also essential.

How long is the ACMA certification valid?

Aruba ACMA / ACA-Campus Access certifications are valid for three years from the pass date. To recertify, candidates retake the current exam or pass a higher-level Aruba certification (such as ACMP) before expiry.

Which Aruba license enables the stateful firewall and per-user roles?

PEFNG (Policy Enforcement Firewall Next Generation) is the controller-side license that enables identity-based stateful firewall, deep packet inspection, AppRF, and per-user role policies. Without PEFNG, basic role assignment still works, but advanced firewall and DPI features are disabled.