A stream of voice packets transmitted over a WAN network encounters differing queuing delays. One router in the path used by the voice packets delays some of the packets for 4 ms while transmitting a large video file， but delays other packets only 2 ms. Another router delays some packets 5 ms， but transmits others in 2 ms. How would you best describe this type of problem？（）

A.centralized management for autonomous access points
B.centralized management for lightweight access points
C.integration with the Location Appliance to expand real time tracking to 1500 devices for 30 days
D.integration with the Location Appliance to expand real time tracking to 2500 devices for 15 days
E.the inclusion of an integrated AAA server F an external AAA-server requirement

A.QoS can be enabled on interfaces used for Easy VPN clients
B.QoS can be enabled on IPsec VPN interfaces and tunnels
C.QoS can be enabled on interfaces with an existing QoS policy
D.the QoS policy can be enabled for incoming and outgoing traffic on the interface

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）