ACA Wireless Technologies 5

Question 1

Which Aruba feature steers dual-band capable clients to the 5 GHz band instead of 2.4 GHz?

Accepted Answer

Band Steering

Answer

Band Steering encourages dual-band clients to connect to the less congested 5 GHz band by delaying probe responses on 2.4 GHz.

Question 2

In 802.11 wireless networking, what is the purpose of the RTS/CTS (Request to Send / Clear to Send) mechanism?

Accepted Answer

To reserve the wireless medium and reduce collisions from hidden nodes

Answer

RTS/CTS is a virtual carrier sensing mechanism that reserves the medium to reduce collisions caused by hidden node scenarios.

Question 3

What is the primary function of Aruba ClearPass in a wireless deployment?

Accepted Answer

It provides network access control, authentication, and policy enforcement

Answer

Aruba ClearPass is a policy management platform that provides AAA (Authentication, Authorization, Accounting) and NAC for wired and wireless networks.

Question 4

Which 802.11 QoS standard defines four access categories (Voice, Video, Best Effort, Background)?

Accepted Answer

802.11e / WMM

Answer

802.11e (implemented as WMM — Wi-Fi Multimedia) defines four access categories with different EDCA parameters to prioritize time-sensitive traffic.

Question 5

What does the term 'channel bonding' mean in the context of 802.11n and later standards?

Accepted Answer

Aggregating two adjacent 20 MHz channels into a 40 MHz or wider channel for higher throughput

Answer

Channel bonding combines adjacent 20 MHz channels into 40, 80, or 160 MHz channels to increase data throughput.

(ACA) Aruba Certified Associate Certification Practice Test

(ACA) Aruba Certified Associate Certification Practice Test

ACA Wireless Technologies 5