多选题Which two of these are characteristics of MPLS VPNs?（）ALayer 3 MPLS VPNs can forward only IP packetsBLayer 2 MPLS VPNs can forward any network protocolCMPLS label paths are automatically formed based on Layer 2 framesDLayer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesEIn Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
多选题
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
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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