Which Azure feature would you utilize to compare the total requests and failed requests for an Application Gateway?

To compare the total requests and failed requests for an Application Gateway, utilizing metrics in the Application Gateway is the best approach. Metrics provide real-time insights into the health and performance of various components in Azure, including the Application Gateway.

Specifically, metrics can deliver crucial visualizations and statistical data regarding request counts, response statuses, and other key performance indicators. By analyzing these metrics, you can easily observe trends in total requests, as well as differentiate between successful and failed requests, which can help in diagnosing issues and ensuring the application is functioning as expected.

The other options provide useful functionalities but do not focus specifically on comparing request metrics. For instance, diagnostics logs would capture detailed information about requests and failures, but they do not provide the real-time analytical overview that metrics do. Connection monitor helps track the connectivity status of resources, while NSG flow logs relate to network security group rules and traffic flow, which are not directly relevant to the application layer metrics you’re interested in measuring.