Practice Test Geeks(ACMA) Aruba Certified Mobility Associate Practice Test
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Wireless Networking Fundamentals & Technologies Flashcards

7 cards from real ACMA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Wireless Networking Fundamentals & Technologies flashcards as text

  1. What is co-channel interference (CCI) in wireless networking?

    Answer: Interference between two APs operating on the same channel within range of each other

    Co-channel interference occurs when two or more APs use the same channel and their coverage areas overlap, forcing clients to compete for the same medium.

  2. In 802.11 WMM (Wi-Fi Multimedia), which Access Category has the highest priority?

    Answer: AC_VO (Voice)

    AC_VO (Voice) has the highest QoS priority in WMM, using the shortest AIFSN and CWmin values to minimize latency for voice traffic.

  3. What is the effect of increasing the channel width from 20 MHz to 80 MHz in 802.11ac?

    Answer: It reduces the number of non-overlapping channels and increases throughput

    Wider channels carry more subcarriers and increase throughput, but consume more spectrum and reduce the number of available non-overlapping channels.

  4. Which physical layer characteristic determines the maximum theoretical data rate of an 802.11 link?

    Answer: Channel width, modulation scheme, coding rate, and number of spatial streams

    The PHY data rate is a product of channel width (subcarrier count), modulation and coding scheme (MCS), and the number of spatial streams used.

  5. What does the 802.11k standard enable in a wireless network?

    Answer: Radio resource measurement and neighbor reporting to assist client roaming decisions

    802.11k provides mechanisms for APs and clients to exchange radio resource measurements and neighbor AP lists, helping clients make better-informed roaming decisions.

  6. Which term describes the phenomenon where a wireless signal arrives at the receiver via multiple paths due to reflections, causing amplitude and phase variations?

    Answer: Multipath fading

    Multipath fading occurs when reflected copies of a signal arrive at slightly different times and phases, causing constructive or destructive interference at the receiver.

  7. In an Aruba network, what is the primary function of the Air Monitor (AM) mode on an AP?

    Answer: Dedicating the AP exclusively to WIDS/WIPS monitoring, scanning all channels for threats

    An AP in Air Monitor mode does not serve client traffic and instead dedicates all resources to scanning channels for rogue APs, security threats, and RF environment data.