You have an Azure subscription that contains a virtual network named VNET1. VNET1 contains the subnets shown in the following table.(含图)
Each virtual machine uses a static IP address.
You need to create network security groups (NSGs) to meet following requirements:
# Allow web requests from the internet to VM3, VM4, VM5, and VM6.
# Allow all connections between VM1 and VM2.
# Allow Remote Desktop connections to VM1.
# Prevent all other network traffic to VNET1.
What is the minimum number of NSGs you should create?