VLAN Tagging, also known as Frame Tagging, is a method developed by Cisco to help identify packets
travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to
the frame and sent across the trunk link .How does ERS use the VLAN tag?
A.
provide service internetworking
B.
support transparency for Layer 2 frames
C.
indicate destination as a connection identifier
D.
map to the DLCI in service internetworking