You implement Software Defined Networking (SDN) by using the Network Controller server role.
You have a virtual network named VNET1 that contains servers used by developers.
You need to ensure that only devices from the 192.168.0.0/24 subnet can access the virtual machine in VNET1.
What should you configure?
A. a network security group (NSG)
B. role-based access control
C. a universal security group
D. Dynamic Access Control