Refer to the exhibit. An engineer must migrate the current topology to a topology that provides more speed, less latency, and support for software-define networks. The new topology has these requireme

"Flood-and-learn" describes a basic Layer 2 switching mechanism and is not a network design topology.

A three-tier topology explicitly segments the network into distinct core, aggregation (distribution), and access layers, providing a structured approach that can naturally introduce varied latency depending on the path taken. This architecture supports the extension of Layer 3 domains by routing at the aggregation or access layers and facilitates a clear evolution towards software-defined networks.

A spine-and-leaf architecture is designed for consistent, low-latency, two-hop communication (any-to-any) within a data center, which contradicts the requirement for varied server-to-server latency and the traditional core/aggregation/access separation.

Core-edge is a general network concept but does not provide the specific layered separation, varied latency, or explicit Layer 3 extension support as comprehensively as a three-tier model.