3V0-25.25 Question #50: Real Exam Question with Answer & Explanation

The correct answer is C. On the VPC transit gateway.. In the VMware Cloud Foundation (VCF) 9.0 and NSX VPC architecture, the Transit Gateway (TGW) is the central routing element that interconnects VPCs to each other and to the provider's infrastructure (Tier-0 or VRF gateways). It acts as the "Project-level" gateway that aggregates

Question

An administrator needs to prevent the datacenter from advertising any internal prefixes toward a new VPC, while still ensuring the VPC receives a default route learned from the datacenter's upstream network. Where should the routing policy be applied?

Options

AOn each segment default gateway.
BOn the Tier-1 gateway.
COn the VPC transit gateway.
DOn the provider Tier-0 neighbor.

Explanation

In the VMware Cloud Foundation (VCF) 9.0 and NSX VPC architecture, the Transit Gateway (TGW) is the central routing element that interconnects VPCs to each other and to the provider's infrastructure (Tier-0 or VRF gateways). It acts as the "Project-level" gateway that aggregates North- South traffic. To control the visibility of routes within a specific VPC, the administrator must utilize Route Filtering at the VPC's boundary. When a VPC is attached to a Transit Gateway, a logical interface is created. To prevent the data center's internal prefixes (such as management networks or other tenant subnets) from being seen by the VPC while still providing a path to the internet, a prefix list or route map should be applied to the VPC Transit Gateway. This policy will explicitly "Deny" specific internal CIDR ranges while "Permitting" the $0.0.0.0/0$ default route advertisement from

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