In Cisco IOS routers that use low latency queuing, which algorithm is used to presort traffic going
into the default queue?

A.
first-in, first-out

B.
last-in, first-out

C.
weighted round robin

D.
fair queuing

E.
random processing

Explanation:
WFQ is a flow-based queuing algorithm used in Quality of Service (QoS) that does
two things simultaneously: It schedules interactive traffic to the front of the queue to reduce
response time, and it fairly shares the remaining bandwidth between high bandwidth flows. A
stream of packets within a single session of a single application is known as flow or converstion.
WFQ is a flow-based method that sends packets over the network and ensures packet
transmission efficiency which is critical to the interactive traffic. This method automatically
stabilizes network congestion between individual packet transmission flows.