When studying for Network Security in Azure, there are several core areas to focus on.
Start with Azure subscription structure
Understand how resources are organized and how that impacts security boundaries.
Then move into virtual networks and subnets.
Know how to segment networks effectively and why subnetting is important for isolating networks.
Next, dive into network security groups. These are essential for controlling inbound and outbound traffic at the subnet or NIC level. Be sure you can configure rules and understand how priority and direction affect traffic flow.
Also, what’s an application security gateway, or ASG? You’ll want to get familiar with that. These let you group VMs by function, making it easier to apply security rules at scale without relying on IP addresses.
And then we have the Azure Firewall, which is a key tool for traffic filtering based on rules and protecting against threats.
Finally, study traffic flow, how your data moves from on-premise networks within your virtual networks and through your Azure services.
Knowing how all these components interact is crucial for designing secure environments and for setting up and preparing for scenario-based questions related to this, so make sure you understand it.