VM1 (IIS hosting a critical LOB app) becomes unresponsive after a new security baseline is applied and you suspect the baseline caused networking issues. To capture a network trace for VM1, what should you do?

The correct answer is to configure the Performance diagnostics settings for VM1 from the Azure portal. This feature, specifically Network Performance Monitor within Azure Monitor, allows you to capture network traces and analyze network connectivity issues for Azure VMs without needing to log into the VM directly. It provides comprehensive network performance data, including latency, packet loss, and path analysis, which is crucial for diagnosing baseline-induced networking problems. Running netstat from within VM1 would only show current network connections and statistics, not a detailed trace of packet flow or potential blockages. Creating a Data Collector Set in Performance Monitor on VM1 is for collecting performance counters, not network packet traces. Configuring general Diagnostics settings from the Azure portal primarily collects guest OS metrics and logs, which might not provide the granular network trace needed to pinpoint connectivity issues.