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、MPLS 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

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第1题

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第2题

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第3题

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第4题

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第5题

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