The cisco 8500 series wireless controllers support cisco application visibility and control (avc). cisco avc includes the network-based application recognition 2 (nbar-2) engine, cisco's deep packet inspection (dpi) capability, which classifies applications, applies quality of service (qos) settings to either drop or mark the traffic, and prioritizes business-critical applications in the network. cisco avc uses netflow version 9 to export the flows to cisco prime™ infrastructure or a third-party netflow collector. the cisco 8500 series also supports bonjour services directory to enable bonjour services to be advertised and utilized in a separate layer 3 network. a wireless policy engine on the cisco 8500 series enables profiling of wireless devices and enforcement of policies such as vlan assignment, qos, access control lists (acls), and time-of-day- based access.