Which two queuing methods will allow a percentage of the available bandwidth to be allocated to each queue?()
A、first-in, first-out queuing (FIFO)
B、priority queuing (PQ)
C、custom queuing (CQ)
D、weighted fair queuing (WFQ)
E、class-based WFQ (CBWFQ)
F、low latency queuing (LLQ)