Creating an Azure Virtual Network (VNet) with four subnets using the address space 192.148.30.0/26 involves a few detailed steps.

Step-by-Step Guide to Creating a VNet with Four Subnets in Azure

Sign in to Azure Portal

1. Open a web browser and go to the Azure portal.
2. Sign in with your Azure account credentials.

Create a Virtual Network

1. In the Azure portal, click on "Create a resource" in the upper-left corner.

1. In the "Search the Marketplace" box, type "Virtual Network" and select it from the list.

1. Click on the "Create" button.

Basics Tab

1. Subscription: Select your subscription.
2. Resource group: Select an existing resource group or create a new one.
3. Name: Provide a name for your virtual network (e.g., MyVNet).
4. Region: Choose the region where you want to create the VNet.
5. Click on the "Next: IP Addresses" button.

IP Addresses Tab

1. IPv4 address space: Enter 192.148.30.0/26.
2. Click on the "+ Add subnet" button to start adding your subnets.

Add Subnets

• You need to divide the 192.148.30.0/26 address space into four subnets. Each subnet in this case will have an address space of /28, which provides 16 addresses per subnet.

• Subnet 1:

1. Name: Subnet1
2. Subnet address range: 192.148.30.0/28
3. Click "Add".

• Subnet 2:

1. Name: Subnet2
2. Subnet address range: 192.148.30.16/28
3. Click "Add".

• Subnet 3:

1. Name: Subnet3
2. Subnet address range: 192.148.30.32/28
3. Click "Add".

• Subnet 4:

1. Name: Subnet4
2. Subnet address range: 192.148.30.48/28
3. Click "Add".

Review and Create

1. Once all subnets are added, click on the "Review + create" button.
2. Review the configuration details and then click on the "Create" button.

Final Address Space Configuration

1. Subnet 1: 192.148.30.0/28 (Range: 192.148.30.0 - 192.148.30.15)

2. Subnet 2: 192.148.30.16/28 (Range: 192.148.30.16 - 192.148.30.31)

3. Subnet 3: 192.148.30.32/28 (Range: 192.148.30.32 - 192.148.30.47)

4. Subnet 4: 192.148.30.48/28 (Range: 192.148.30.48 - 192.148.30.63)

By following these steps, you will have successfully created an Azure Virtual Network with four subnets using the address space 192.148.30.0/26.