Refer to the exhibit. You have recently implemented a VoWiFi solution with QoS, but users are experiencing poor call quality during busy periods. Based on the output generated after some test calls…

Question

Exhibit

Options

• Areconfigure DSCP mapping
• Benable WMM for the SSID
• Cdisable AirSlice
• Dupdate ACLs

• A
  17% (6)
• B
  71% (25)
• C
  3% (1)
• D
  9% (3)

Explanation

Enabling WMM (Wi-Fi Multimedia) on the SSID is the fix because WMM is the 802.11e-based mechanism that actually enforces QoS priority over the air. Without WMM active on the SSID, all wireless frames compete equally for airtime regardless of any DSCP markings - voice packets get no preferential treatment, causing degraded call quality under load.

Why the distractors are wrong:

• A (Reconfigure DSCP mapping): DSCP markings operate at Layer 3 and may already be correct; the problem is that the wireless layer can't act on those markings without WMM enabled.
• C (Disable AirSlice): AirSlice (Aruba's per-client airtime slicing) is a fairness feature - disabling it would hurt, not help, multi-user scenarios.
• D (Update ACLs): ACLs govern access control, not traffic prioritization; changing them won't resolve a QoS/airtime contention issue.

Memory tip: Think of it as a two-stage pipeline - DSCP marks the traffic, but WMM is the "on switch" that tells the radio to honor those marks. No WMM = no wireless QoS, no matter how perfect your DSCP config is.

No community discussion yet for this question.