Availability Zones

This is relatively a new concept introduced in Azure and very similar to zone redundancy we saw for storage accounts. Availability Zones provides high availability within a region by placing virtual machines instances on separate data centers within a region. Availability Zones are applicable to virtual machines, managed disks, virtual machine scale sets and load balancers. This was a gap in Azure for a long time and has been removed recently from computing high availability perspective. More information about Availability Zones is available at https://docs.microsoft.com/en-us/azure/availability-zones/az-overview.