试题详情
- 单项选择题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
- C
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