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思科认证考试

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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
正确答案:C
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