单选题In which solution is a router ACL used？（）Aprotecting a server frome unauthorized accesBcontrolling path selection，based on the route metricCreducing router CPU utilizationDfilterring packets that are passing through a router
单选题
In which solution is a router ACL used？（）
A
protecting a server frome unauthorized acces
B
controlling path selection，based on the route metric
C
reducing router CPU utilization
D
filterring packets that are passing through a router
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