What type of interface is supported in NSX-V?

The correct answer is vWire, which refers to the virtual wire interface in NSX-V. This interface plays a crucial role in NSX’s approach to network virtualization. vWire allows for the direct attachment of virtual machines (VMs) to a logical switch without traditional network devices or physical network configurations getting in the way. It essentially functions as a L2 connection that allows for data traffic between the virtual networks without the need for an intermediary gateway.

This design is particularly useful in scenarios where immediate communication between VMs is required and allows for faster deployment of network services. By leveraging vWire, NSX-V simplifies network architecture by minimizing the complexity of physical network devices and providing flexibility in how VMs can be interlinked.

Each of the other options presented lacks the specific functionality that vWire offers. Tap interfaces typically relate to monitoring network traffic, Layer 2 interfaces are standard in networking but do not encapsulate the unique virtualization features NSX-V offers, and Layer 3 interfaces pertain to routing functionalities which are not what NSX-V primarily leverages in this context. Thus, vWire stands out as the correct choice for its specialized purpose within NSX-V connectivity.