Which of the following descriptions about the PWE3 network reference model is wrong?

Question

Options

• APE is located at the edge of the operator's network and is a device that provides PWE3 to CE
• BCE cannot perceive whether the simulated service or the local service is being used
• CPES establishes a point-to-point channel, the channels are isolated from each other, and the user=layer
• DTunnel is a mechanism for transparently carrying information on the network. It is used to carry P7. A

• A
  15% (6)
• B
  5% (2)
• C
  3% (1)
• D
  78% (31)

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