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350-401 · Question #543

Refer to the exhibit. An engineer is troubleshooting an application running on Apple phones. The application Is receiving incorrect QoS markings. The systems administrator confirmed that ail configura

The correct answer is A. Enable Fastlane. Explanation Fastlane is a Cisco feature on the WLC (Wireless LAN Controller) specifically designed for Apple devices, as it implements Apple's recommended QoS policies by automatically marking traffic from iOS/macOS devices with the correct DSCP values - this directly resolves in

Submitted by jaden.t· Mar 6, 2026Infrastructure

Question

Refer to the exhibit. An engineer is troubleshooting an application running on Apple phones. The application Is receiving incorrect QoS markings. The systems administrator confirmed that ail configuration profiles are correct on the Apple devices. Which change on the WLC optimizes QoS for these devices?

Options

  • AEnable Fastlane
  • BSet WMM to required
  • CChange the QoS level to Platinum
  • DConfigure AVC Profiles

How the community answered

(23 responses)
  • A
    74% (17)
  • B
    9% (2)
  • C
    4% (1)
  • D
    13% (3)

Explanation

Explanation

Fastlane is a Cisco feature on the WLC (Wireless LAN Controller) specifically designed for Apple devices, as it implements Apple's recommended QoS policies by automatically marking traffic from iOS/macOS devices with the correct DSCP values - this directly resolves incorrect QoS markings on Apple phones when the device-side configuration profiles are already confirmed correct.

Option B (WMM Required) is incorrect because WMM (Wi-Fi Multimedia) is a prerequisite for QoS on wireless networks, but simply setting it to "required" does not correct the specific QoS markings Apple devices need; it also doesn't target Apple-specific traffic handling.

Option C (Platinum QoS) is incorrect because changing the QoS profile to Platinum applies broadly to all traffic on the WLAN and doesn't intelligently reclassify Apple device traffic with the appropriate per-application markings.

Option D (AVC Profiles) is incorrect because Application Visibility and Control (AVC) is used for application recognition and policy enforcement, not specifically for correcting Apple device QoS marking issues.

Memory Tip: Think "Fastlane = Apple's fast lane" - just like Apple has its own ecosystem, Fastlane is Cisco's dedicated "express lane" built specifically for Apple devices, making it the go-to fix whenever Apple + QoS appears in a question.

Topics

#Wireless QoS#Cisco Fast Lane#WLC Configuration#Apple Device Integration

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