Assign multiple IP addresses to virtual machines-Troubleshooting
An Azure Virtual Machine (VM) has one or more network interfaces (NIC) attached to it. Any NIC can have one or more static or dynamic public and private IP addresses assigned to it.
Assigning multiple IP addresses to a VM enables the following capabilities:
Hosting multiple websites or services with different IP addresses and TLS/SSL certificates on a single server.
Serve as a network virtual appliance, such as a firewall or load balancer.