300-610 Question #220: Real Exam Question with Answer & Explanation

An engineer must provide Layer 2 adjacency between data centers that are in two locations and separated by a routed network. The adjacency must be based on Cisco Nexus 7000 Series Switches. The solution must offload learning of host reachability information to the control plane to avoid excessive flood and learn congestion. Also the data center in one of the sites experiences a large volume of unknown unicast traffic that the solution must mitigate. Which data center interconnect technology meets these requirements?