What is the minimum number of virtual NICs that you can configure for a virtual machine?

Four vNICs is a common maximum or a configuration for specific purposes, not the minimum.

A virtual machine typically requires at least one virtual network interface card (vNIC) to connect to a virtual network, communicate with other virtual machines or the physical network, and access network services. While a VM can exist without a vNIC, one is the minimum for network functionality.

Zero vNICs means the virtual machine has no network connectivity, making it non-functional for most network-dependent tasks.

Two vNICs are often used for redundancy or segregation of network traffic, but it is not the minimum required for basic network communication.