When creating a VPC, enabling the Transit VPC toggle changes the role of the VPC. What does the Transit VPC toggle do?

Enabling the Transit VPC toggle configures the VPC to function as a central hub in a hub-and-spoke network topology. This transit hub is designed to route traffic between multiple connected "spoke" VPCs and can also provide a centralized point of connectivity to external networks. This architecture simplifies network management and scaling by eliminating the need to create a complex full-mesh of connections between all VPCs. All inter-VPC traffic flows through the central transit VPC for routing and policy enforcement.

(These explanations are based on plausible but incorrect functions for the other options.)

A. It enables direct peering with all other VPCs in a full mesh.

This is incorrect. The Transit VPC creates a hub-and-spoke model specifically to avoid the complexity of a full-mesh topology.

C. It isolates the VPC from all external and internal networks.

This is incorrect. The purpose of a Transit VPC is the opposite; it is designed to connect and route traffic between multiple networks.

D. It automatically applies a quarantine security policy to the VPC.

This is incorrect. Security policies are configured independently using Flow Network Security (formerly Flow Microsegmentation) and are not a function of the Transit VPC role.

1. Nutanix Flow Virtual Networking Guide v4.0: In the section "VPC-to-VPC Connectivity with Transit VPC," the documentation states, "Flow Virtual Networking allows you to create a transit VPC that functions as a central hub for networking and security services. You can connect one or more spoke VPCs to a transit VPC. The transit VPC acts as a centralized entity that routes traffic between the connected spoke VPCs and the external network."

2. Nutanix Flow Virtual Networking Guide v4.0: The same section further clarifies the benefit: "A transit VPC simplifies network management by removing the need for a full-mesh connection between all the VPCs." This directly refutes the idea of creating a full mesh.