You have Sub1 with RG1 and the listed resources and Microsoft Defender for Servers enabled. You have Contributor permissions on Sub1. To enable just-in-time (JIT) access for VM1, what is the first task you must perform?

To enable Just-in-Time (JIT) VM access, a Network Security Group (NSG) must be associated with the VM's network interface or subnet. JIT works by dynamically opening and closing ports on the NSG. Without an NSG, JIT cannot enforce its port restrictions. Creating an NSG is the foundational step. While enhanced security in Defender for Cloud is required for JIT, it's a configuration setting, not the initial resource creation. Contributor permissions are sufficient for this task, so requesting the Owner role is unnecessary. An application security group (ASG) is used for grouping network interfaces for security rules, but an NSG is still required to apply those rules.