Explanation:
Normalization is the process of organizing data in a database. This includes creating tables and establishing relationships between those tables according to rules designed both to protect the data and to make the database more flexible by eliminating redundancy and inconsistent dependency.
https://docs.microsoft.com/en-us/office/troubleshoot/access/database-normalization-description#:~:text=Normalization%20is%20the%20process%20of,eliminating%20redundancy%20and%20inconsistent%20dependency

The Azure production network is segregated into three primary VLANs in a logical manner.
The FC VLAN: It contains supporting systems and trusted Fabric Controllers The Main VLAN: It interconnects the untrusted customer nodes The Device VLAN: It contains a trusted network and all other infrastructure devices Option A is incorrect. The Device VLAN contains a trusted network and all other infrastructure devices.
Option B is incorrect. The main VLAN interconnects the untrusted customer nodes.
Option C is correct. The FC VLAN contains supporting systems and trusted Fabric Controllers.
Option D is incorrect. Azure SQL Database provides a firewall functionality to protect customer data. It's not a type of VLAN.
Reference: To know more about the VLAN Isolation, refer to the link below:
https://docs.microsoft.com/en-us/azure/security/fundamentals/infrastructure-sql