An engineer is designing a multitenant data center using Cisco validated design practices. The engineer must ensure that traffic is security segregated between tenants at the core layer and aggregation layers. Which design must be implemented to accomplish this task?
A. VRF-Lite on the core and aggregation layer routing infrastructure
B. strict core and aggravation level QoS traffic shaping
C. strict core and aggregation level QoS policing
D. disparate VLANs across the core and aggregation layer switching infrastructure
