add a diagram

Author: halkazwini

articles/network-watcher/diagnose-vm-network-routing-problem.md

@@ -25,6 +25,8 @@ In this tutorial, you learn how to:
 > * Create a custom route
 > * Diagnose a routing problem
 
+:::image type="content" source="./media/diagnose-vm-network-routing-problem/next-hop-tutorial-diagram.png" alt-text="Diagram shows the resources created in the tutorial.":::
+
 If you prefer, you can diagnose a virtual machine network routing problem using the [Azure CLI](diagnose-vm-network-routing-problem-cli.md) or [Azure PowerShell](diagnose-vm-network-routing-problem-powershell.md) versions of the tutorial.
 
 If you don't have an Azure subscription, create a [free account](https://azure.microsoft.com/free/?WT.mc_id=A261C142F) before you begin.