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Zorluk: OrtaCreate and Configure Virtual Networks and Subnets

An administrator is configuring a new virtual network named `VNet1` in an Azure subscription. The virtual network is assigned an address space of 10.200.0.0/1610.200.0.0/16.

The administrator has the following requirements:
- Deploy Azure Bastion to secure access to virtual machines.
- Create a subnet named `Subnet-Web` that must support at least 1212 virtual machines.

Which two of the following subnet configurations should the administrator implement to meet the requirements? (Select two.)

  1. A subnet named `AzureBastionSubnet` with the address range 10.200.2.0/2610.200.2.0/26Cevap
  2. A subnet named `Subnet-Web` with the address range 10.200.1.0/2710.200.1.0/27Cevap
  3. C
    A subnet named `Subnet-Web` with the address range 10.200.1.0/2810.200.1.0/28
  4. D
    A subnet named `AzureBastionSubnet` with the address range 10.200.2.0/2710.200.2.0/27
  5. E
    A subnet named `BastionSubnet` with the address range 10.200.3.0/2610.200.3.0/26

Cevap

A subnet named AzureBastionSubnet with the address range 10.200.2.0/26 and a subnet named Subnet-Web with the address range 10.200.1.0/27
To deploy Azure Bastion, the subnet must be named exactly AzureBastionSubnet and have a subnet prefix of /26 or larger. Therefore, the subnet named AzureBastionSubnet with the range 10.200.2.0/26 is correct. To host 12 virtual machines in Subnet-Web, the subnet must support at least 17 IP addresses because Azure reserves 5 IP addresses in every subnet (the first four and the last one). A /28 subnet only provides 11 usable IP addresses (16 - 5), whereas a /27 subnet provides 27 usable IP addresses (32 - 5), making the range 10.200.1.0/27 the minimum size that meets this requirement.

Adım Adım Çözüm

1
Calculate the required subnet size for Subnet-Web.
Minimum IP addresses needed is 12 (VMs)+5 (Azure reserved IPs)=1712 \text{ (VMs)} + 5 \text{ (Azure reserved IPs)} = 17 IP addresses.
Azure reserves the first four and the last IP address of every subnet.
2
Select the correct CIDR block for Subnet-Web.
A /27/27 subnet (3232 total IPs, 2727 usable) is required because a /28/28 subnet only provides 1111 usable IPs (16−5=1116 - 5 = 11).
The subnet size must be the smallest available range that accommodates at least 1717 IP addresses.
3
Determine name and size requirements for Azure Bastion.
The subnet must be named exactly `AzureBastionSubnet` and have a prefix of /26/26 or larger.
Azure Bastion enforces strict naming and minimum subnet size (at least /26/26) constraints.

Anahtar Kavram

Azure virtual network subnet sizing including the 5 reserved IP addresses and Azure Bastion configuration requirements.
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Konular

Create and Configure Virtual Networks and Subnets