The enterprise campus core layer has requirements that are unique from the distribution and access layers. Which of the

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The enterprise campus core layer has requirements that are unique from the distribution and access layers. Which of the following is true about the core layer?

A. The core layer provides convergence using Layer 2 and Layer 3 services and features.
B. The core layer provides high availability to support the distribution layer connections to the enterprise edge.
C. The campus core layer is optional.
D. The core layer requires high performance to manage the traffic policing across the backbone.