A company implemented VoIP in a campus network and now wants a consistent method to implement using AutoQoS. Which two parameters must be considered before AutoQoS is configured? (Choose two.)

AutoQoS relies on Cisco Express Forwarding (CEF) to perform the packet switching and traffic classification needed to generate QoS policies automatically. Without CEF enabled globally, AutoQoS will not function.

AutoQoS is available on both Cisco routers and Catalyst switches, not exclusively on routers.

AutoQoS automatically discovers traffic using NBAR and built-in heuristics, so manual traffic discovery is not required.

If a service policy is already attached to an interface with the 'service-policy' command, AutoQoS cannot be configured on that same interface because it would conflict with the existing policy.

The entire purpose of AutoQoS is to automate traffic analysis and policy generation, eliminating the need for manual traffic analysis.