You need to determine where the trust boundaries will be in a new Company VOIP design. Which two statements are true about these trust boundaries？（）
- ATrust boundaries are configured in the core of the network to provide the most efficient forwarding based upon QoS markings，
- BSetting trust boundaries at the edge of the network allows intermediate hop devices to administer QoS policies without detailed packet identification.
- CTrust boundaries are used to determine which QoS mechanism will be applied to the traffic.
- DAt the trust boundaries， the untrusted traffic will be marked with a new QoS value appropriate for the policy in place at the point where the traffic entered the campus network.
- ETrust boundaries define the firewall rules for QoS admission into a network.