Regarding the primary network interface during a failover to an Azure VM, what is true?

The primary network interface of an Azure Virtual Machine is essential for handling all outbound traffic. When a failover occurs, the primary network interface continues to route outgoing traffic to the internet or to other services, ensuring that the VM remains connected and operational. This design maintains the availability and connectivity of the virtual machine, allowing it to interact with resources both within and outside of the Azure environment.

While inbound traffic may be permitted depending on the network security group rules applied, the primary function of the interface during a failover is indeed to facilitate outbound communications integral for the VM’s operation. Therefore, it is accurate to claim that it is used for all outbound traffic, providing essential connectivity and redundancy during failover scenarios.