Which statement about core-edge SAN topology is true?

Which statement about core-edge SAN topology is true?
A . Converged FCoE links connect the core and edge MDS switches.
B . The SAN core connects to the network aggregation layer.
C . Separate links with the same I/O are used for SAN and LAN traffic.
D . Storage devices are accessed via FCoE over the LAN network.

Answer: B

Explanation: The Aggregation layer of the data center provides connectivity for the Access layer switches in the server farm, an aggregates them into a smaller number of interfaces to be connected into the Core layer. In most data center environments, the Aggregation layer is the transition point between the purely Layer 3 routed Core layer, and the Layer 2-switched Access layer. 802.1Q trunks extend the server farm VLANs between Access and Aggregation layers. The Aggregation layer also provides a common connection point to insert services into the data flows between clients and servers, or between tiers of servers in a multi-tier application.