Explore a virtual network

You've just joined the cloud team and inherited a virtual network called vnet-app. It lives in rg-lab, a resource group (a folder that holds related Azure resources). Before you change anything, get to know it: list the virtual networks, look at vnet-app's address space, and count its subnets (the smaller sections a VNet is split into).

1. List every virtual network in the resource group as a table.

   az network vnet list -g rg-lab -o tableType it
   What's this?

   Shows virtual networks: their address space and subnets.

   • -g the resource group the resources live in
   • -g rg-lab the resource group to look in (short for --resource-group)
   • -o table print a table instead of JSON (short for --output)

2. Show just the address space of vnet-app. --query picks one field out of the JSON.

   az network vnet show -g rg-lab --name vnet-app --query addressSpace.addressPrefixesType it
   What's this?

   Shows virtual networks: their address space and subnets.

   • -g the resource group the resources live in
   • --name the name of the thing to look at or change
   • --name vnet-app which virtual network
   • --query a JMESPath expression that filters the output

3. List the names of vnet-app's subnets.

   az network vnet show -g rg-lab --name vnet-app --query "subnets[].name"Type it
   What's this?

   Shows virtual networks: their address space and subnets.

   • -g the resource group the resources live in
   • --name the name of the thing to look at or change

4. Count the subnet names from step 3, then answer below.

   How many subnets does vnet-app have?

   Check