In a typical converged campus network, which two of the following are considered QoS best practices? (Choose two.)
A.
Traffic classification and marking is performed as close to the traffic source as possible.
B.
Traffic classification and marking is performed at the high speed core layer.
C.
Ensure voice traffic is serviced by a weighted fair queue.
D.
Only a reasonable number of applications should be classified into the mission-critical traffic class.
E.
NBAR is used at the high speed core layer to discover and classify network applications.
F.
Catalyst switches should use weighted round robin (WRR) queuing giving the voice traffic the highest priority.