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多项选择题Which two of these are characteristics of MPLS VPNs？ （）

A、 Layer 3 MPLS VPNs can forward only IP packets

B、 Layer 2 MPLS VPNs can forward any network protocol

C、 MPL S label paths are automatically formed based on Layer 2 frames

D、 Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 frames

E、 In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policies

  • A,B

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