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单选题
Which of the following is not a characteristic of fast switching?()
A

Fast switching reducesa routers CPU utilization, compared to process switching

B

All packets of a flow, except for the first packet, use the information in the fast cache

C

It can be enabled with the interface command ip route-cache

D

Fast switching uses a fast cache maintained in a router’s control plane

E

The fast cache contains information about how traffic from different data flows should beforwarded

F

Even though the fast switching is enabled, the first packet of a flow is still process switched


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