Which is a feature of the Data Center Core layer?

A.
The core layer provides the high-speed packet switching backplane for all flows going in and out
of the data center.

B.
The core layer provides the high-speed packet switching backplane for all flows going out of the
data center.

C.
The core layer is purely a Layer 2 environment. As a result, the core layer is not free of spanning
tree and vPC.

D.
The core layer provides connectivity to multiple aggregation modules and provides a resilient
Layer 3 routed fabric with a single point of failure.