On the IP bearer network, which of the following methods can be used to manage devices on the backbone network and switches on the signaling VPN?

On the IP bearer network, which of the following methods can be used to manage devices on the backbone network and switches on the signaling VPN?
A . Construct an outband NM network to manage all devices.
B . Leak public and private network routes to manage devices on the public and private networks.
C . Establish two physical or logical links with the PE to manage devices on the public and private networks. One link belongs to the public network and the other belongs to the private network.
D . Establish a physical or logical link with the PE and mount MCEs to the PE to manage devices on the public and private networks.

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Answer: A, B, C