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Question

Difficulty: EasyCreate and Configure Virtual Networks and Subnets

Your company has an Azure subscription containing a resource group named RG-Hub and a virtual network named VNet-Transit. You need to deploy an Azure Bastion host into VNet-Transit to provide secure access to virtual machines. You must create a new subnet in VNet-Transit to host the Azure Bastion service. Which subnet configuration must you use?

  1. Name: AzureBastionSubnet; Prefix size: /26 or largerAnswer
  2. B
    Name: BastionSubnet; Prefix size: /26 or larger
  3. C
    Name: AzureBastionSubnet; Prefix size: /29 or larger
  4. D
    Name: AzureBastion-Subnet; Prefix size: /27 or larger

Answer

Name: AzureBastionSubnet; Prefix size: /26 or larger
The correct subnet configuration for Azure Bastion is to use the exact name 'AzureBastionSubnet' and a subnet prefix of /26 or larger. This ensures that the Azure platform can identify the subnet and that there are sufficient IP addresses for scaling the Bastion host instances.

Step-by-Step Solution

1
Determine the exact subnet name requirement for Azure Bastion.
The subnet must be named exactly 'AzureBastionSubnet'.
Azure uses this specific name to provision and manage the Bastion service resources correctly.
2
Determine the minimum prefix size required for the Bastion subnet.
The minimum subnet prefix size is /26.
Azure Bastion requires a /26 or larger prefix to support the required number of IP addresses for host instances and scaling.

Key Concept

Azure Bastion Subnet Requirements
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Topics

Create and Configure Virtual Networks and Subnets