Which of the following descriptions about the enhanced MSTP metro solution are correct? (Multiple choice)

The correct answer is A. The line bandwidth can reach 20G, and support smooth switching to 40G B. Unified service bearer, TDM service and Ethernet service are independently forwarded and bearer C. A single ring has a maximum of 64 nodes, supporting tangent/intersecting multiple topologies D. MRPS+SNCP dual-plane protection, far less than 50ms protection switching. See the full explanation below for the reasoning.

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AThe line bandwidth can reach 20G, and support smooth switching to 40G
BUnified service bearer, TDM service and Ethernet service are independently forwarded and bearer
CA single ring has a maximum of 64 nodes, supporting tangent/intersecting multiple topologies
DMRPS+SNCP dual-plane protection, far less than 50ms protection switching

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