What are two features of the three-tier designs? (Choose two.)
A . removes the distribution layer in favor of a spine-leaf design used in modern data center deployments
B . adds a distribution layer to free up resources from the Core for improved performance and routing throughput
C . a more scalable design over by leveraging a distribution layer to handle Layer 3 routing and access control in large deployments
D . uses only Layer 2 access on the Access and the Core with Layer 3 routing and access control provided at the distribution layer
E . is considered legacy by requiring a large flat layer-two broadcast domain from Core to Access and should be avoided
Answer: B,C