Which statement about VLAN is false?
A. A VLAN tag contains a 3-bit priority field. The priority value ranges from 0 to 7. It is used for differentiated service forwarding.
B. The priority in the VLAN tag can be mapped to the internal priority of the switch, for differentiated service forwarding.
C. The priority in the VLAN tag can be changed on the switch.
D. The priority in the VLAN tag cannot be changed.
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