Which action ensures prioritization of voice over data traffic?

seenagapeSeptember 10, 2015

A.
voice and data VLAN on different subnets with QoS classification

B.
voice and data VLAN on same subnets without QoS classification

C.
signaling and media traffic marked with Layer 2 CoS and Layer 3 DSCP mappings

D.
signaling and media traffic marked with Layer 2 DSCP and Layer 3 CoS mappings

Explanation:

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