How does the Ethernet Relay Service use the VLAN tag?
A.
to provide service internetworking
B.
to support transparency for Layer 2 frames
C.
as a connection identifier to indicate destination
D.
as a mapping to the DLCI in service internetworking
E.
to provide a trunk by which all VLANs can navigate from one site to one or multiple sites
Explanation:
C.
as a connection identifier to indicate destination
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