Based on a modular approach in network design, what are the two functionalities of the data center core layer? (Choose two.)
A. high-speed transport
B. connection between WAN and server farm blocks
C. access-list checking and filtering
D. data encryption
E. NAT
A&B are correct:
The data center core layer provides a fabric for high-speed packet switching between multiple aggregation modules. This layer serves as the gateway to the campus core where other modules connect, including, for example, the extranet, WAN, and Internet edge. All links connecting the data center core are terminated at Layer 3 and typically use 10 GigE interfaces for supporting a high level of throughput, performance, and to meet oversubscription levels.