An engineer is in the process of implementing Fastlane on a wireless network with a Mobility Express AP installed. The network must support voice and video applications for Apple devices. Due to a security concern, all iPhones are updated to version 14.5.432302546. Which QoS profile must the engineer configure on the user WLAN?

To support real-time voice and video applications on Apple devices using Cisco Fastlane, the WLAN must be configured with the highest appropriate Quality of Service (QoS) profile. The Platinum profile is specifically designed for voice traffic, providing the highest level of priority (WMM User Priority 6). Configuring the WLAN with the Platinum profile ensures that when a Fastlane-enabled Apple device marks its voice or video traffic for high priority, the Cisco wireless network can honor these markings and provide the necessary low-latency, low-jitter treatment. The specific iPhone version and the mention of a "security concern" are distractors; the core requirement is to enable QoS for voice and video via Fastlane.

A. Bronze: This profile is for low-priority background traffic and would provide inadequate performance for real-time voice and video applications.
B. Best Effort: This is a traffic classification, not a configurable profile name. It corresponds to the Silver profile, which is insufficient for prioritizing real-time voice and video traffic.
C. Silver: This is the default profile for general data traffic ("best effort"). It does not provide the high priority required by voice and video, defeating the purpose of implementing Fastlane.

1. Cisco White Paper, "Enterprise Best Practices for Apple Devices on Cisco Wireless LAN" (2021). In the section "WLAN Configuration for Fastlane," the recommended configuration for Quality of Service (QoS) is explicitly stated as "Platinum." This allows the network to support the highest priority markings from Apple devices.

2. Cisco, "Cisco Wireless Controller Configuration Guide, Release 8.10," Chapter: Configuring QoS. The section "Information About QoS Profiles" defines the Platinum profile: "This profile is designed to support high-priority traffic, such as voice over WLAN." This confirms Platinum is the correct choice for voice applications.

3. Cisco, "Cisco Mobility Express Deployment Guide, Cisco Wireless Release 8.10," Chapter: Configuring Cisco Mobility Express. The section "Configuring a WLAN" describes the QoS tab options, listing "Platinum (Voice)" as the profile for voice traffic, confirming its applicability in a Mobility Express environment.