Which queuing and compression mechanisms are needed to effectively use the available bandwidth for voice traffic? (Choose two)

A.
class-based weighted far queuing (CBWFQ)

B.
low latency queuing (LLQ)

C.
priority queuing (PQ) or custom queuing (CQ)

D.
Real-Time Transport Protocol (RTP) header compression

E.
TCP header compression

F.
UDP header compression