A. Multiple flows are matched to the same bandwidth policy, and bandwidth multiplexing can be achieved between multiple flows.
B. Multiple bandwidth policies refer to the bandwidth channel in the way of policy sharing, so that bandwidth multiplexing can be achieved among multiple flows that match the bandwidth policy.
C. Bandwidth multiplexing can be achieved between multiple flows that match multiple child policies in the parent-child policy.
D. Multiple bandwidth policies refer to the bandwidth channel in a policy-exclusive manner, and bandwidth multiplexing can be achieved among multiple flows that match the bandwidth policy.