Creating an Azure virtual network (VNet) with four subnets using the address space 192.148.30.0/26 several steps in the Azure portal. Below is a step-by-step guide with screenshots to help you through the process:

Step 1: Sign in to Azure Portal

• Open your web browser and navigate to the Azure Portal.
• Sign in with your Azure account credentials.

Step 2: Create a Resource Group (if needed)

If you do not already have a resource group where you want to create the virtual network, you can create one:

• In the Azure portal, click on Resource groups in the left-hand menu.
• Click + Add to create a new resource group.
• Fill in the required details (Subscription, Resource group name, Region), and click Review + create and then Create.

Step 3: Create a Virtual Network

Now, let's create the virtual network with the specified address space and subnets:

• In the Azure portal, click on Virtual networks from the home page, then click + Create.

• Fill in the required details:
  • Subscription: Choose your Azure subscription.
  • Resource group: Select the resource group you created or want to use.
  • Name: Enter a name for your virtual network.
  • Region: Choose the Azure region where you want to deploy the virtual network.

• IPv4 address space: Enter 192.148.30.0/26 for the address space.The image below shows that we can have 64 addresses within this network.

Step 4: Configure Subnets

Now, let's configure the four subnets within the virtual network:

• Under Subnets, click + Add subnet.

• Configure each subnet as follows:
  • Subnet Name: Enter a name for the subnet (e.g., Subnet-1, Subnet-2, etc.).

• Subnet Address range: Specify the subnet range within the virtual network address space (192.148.30.0/26). Ensure each subnet range is within the /26 address space (192.148.30.0 to 192.148.30.63)

• Click Add for each subnet after configuring its details

• For Subnet-1: 192.148.30.0/28 - 192.148.30.15/28

• For Subnet-2: 192.148.30.16/28 - 192.148.30.31/28

• For Subnet-3: 192.148.30.32/28 - 192.148.30.47/28

• For Subnet-4: 192.148.30.48/28 - 192.148.30.63/28

• Once all four subnets are added, click Review + create.

Step 5: Review and Create

• Review the details of your virtual network configuration.
• Click Create to deploy the virtual network and its subnets.

Step 6: Deployment Progress

Wait for Azure to deploy the virtual network and subnets. This process usually takes a few minutes.

Step 7: Verification

• Once deployment is complete, click on Go to resources.
• Navigate to Settings,click on subnets

Congratulations! You have successfully created an Azure virtual network with four subnets using the address space 192.148.30.0/26.