Users report slowness on the network, and it is suspected that certain applications are consuming...

The correct configuration approach is to enableApplication Visibility and Controlon thepolicy profile. On the Catalyst 9800, WLANs are not configured as isolated monolithic objects; the WLAN profile is mapped to a policy profile through a policy tag, and many client traffic services are applied from that policy profile. Cisco defines AVC as the wireless feature set that identifies and monitors applications using DPI, creates rules to manage application bandwidth and usage, and integrates with Flexible NetFlow for per-application or per-protocol statistics. Cisco further states that AVC benefits from NBAR running on the AP or controller, and that the NBAR2 engine analyzes and recognizes traffic flows.

Operationally, Cisco’s 9800 AVC guide shows that AVC is enabled by navigating toConfiguration > Services > Application Visibilityand selecting the relevantPolicy Profile. It also shows the CLI form under the policy profile:wireless profile policy AVC_testingfollowed byip nbar protocol-discovery, with verification showingNBAR Protocol Discovery : Enabled. Options A and B are incorrect because the feature is not enabled directly on the WLAN. Option C is generic and incomplete; the Cisco feature construct is AVC. Reference topics:AVC, NBAR2, Flexible NetFlow, Catalyst 9800 policy profiles, and wireless application visibility.