How many virtual network interfaces does a VM-Series firewall need when deployed on NSX?

The correct answer indicates that a VM-Series firewall deployed on NSX requires three virtual network interfaces. This configuration includes one interface dedicated to traffic input, one for traffic output, and a third interface specifically for management traffic.

Having this setup allows the firewall to appropriately separate and manage different types of network traffic, ensuring better security and performance. The dedicated input and output interfaces are essential for processing network traffic efficiently, allowing for throughput optimization and effective traffic inspection. The management interface is crucial for configuring and managing the firewall, facilitating connectivity to management applications and tools without interfering with data traffic.

This three-interface configuration strikes a balance, offering necessary functionality without over-complicating the network setup or resource allocation, hence supporting efficient operations within a virtualized environment such as NSX.