What should you do?

You manage an application that has a front-end tier, a middle tier, and a back-end tier. Each tier is located on a different subnet.

You need to apply access to and between the tiers as follows:

• Only the front-end tier must be able to access the Internet.

• You must permit network access between the front-end tier and the middle tier.

• You must permit network access between the middle tier and the back-end tier.

• You must prevent all other network traffic.

You need to apply this configuration to all virtual machines inside the subnets.

What should you do?
A . Use a Network Security Group (NSG).
B . Add a VPN gateway.
C . Add a regional VNE
E . Add an Availability Set.

Answer: D

Explanation:

https://docs.microsoft.com/en-us/azure/virtual-machines/virtual-machines-windows-infrastructure-availability-sets-guidelines