Question: Why are VLANs restricted to layer 3 communications? a . VLANs must use MAC addresses. b . VLANs rely on UDP. c . VLAN tags

Why are VLANs restricted to layer 3 communications?
a. VLANs must use MAC addresses.
b. VLANs rely on UDP.
c. VLAN tags are added at layer 2.

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