Final answer:
In a virtual network subnet and network interface in a VM, you can associate multiple Network Security Groups (NSGs) to apply specific security rules at different network levels.
Step-by-step explanation:
In a virtual network subnet and network interface in a VM, you can associate multiple Network Security Groups (NSGs). An NSG is a virtual firewall that allows or denies network traffic to and from resources in your virtual network. Each NSG can contain multiple inbound and outbound security rules which define the allowed or denied traffic.
For example, if you have a virtual network subnet with a network interface in a VM, you can associate an NSG to the subnet and another NSG to the network interface. This allows you to apply specific security rules at different network levels. Therefore, the number of NSGs that can be associated with a virtual network subnet and network interface is multiple, depending on the specific requirements of your network configuration.
Learn more about Network Security Groups