Which deployment mode of NSX-T employs a centralized routing model?

The centralized routing model in NSX-T is associated with Tier-0 routing. This deployment mode is designed to handle the north-south traffic for the data center, which means it manages the traffic flowing in and out of the virtualized environment.

Tier-0 gateways provide a single point of entry and exit for east-west and north-south traffic, simplifying network management and providing high availability. This centralized approach allows for better control over routing policies and enables the implementation of advanced features such as load balancing, centralized firewall rules, and service chaining, which are essential for maintaining the integrity and performance of the overall network.

In contrast, Tier-1 routing is generally used for local traffic management within a specific segment or tenant, focusing on east-west traffic rather than centralizing the routing functions. Edge routing is typically concerned with routing performed on the edge nodes, again emphasizing local traffic flows and distributed scenarios. Local routing pertains to the management of traffic within a single routing domain without centralization, which does not accommodate the broader needs of a complex, multi-tenant environment. Therefore, Tier-0 routing is the correct choice as it effectively implements a centralized routing model, ensuring comprehensive traffic management across the entire NSX-T deployment.