
Explanation:
Box 1: Azure Service Endpoint
Application Insights enables you to set up recurring web tests that monitor your website or application's availability and responsiveness from various points around the world.
Box 2: Standard test
Standard test: A type of availability test that checks the availability of a website by sending a single request, similar to the deprecated URL ping test. In addition to validating whether an endpoint is responding and measuring the performance, Standard tests also include TLS/SSL certificate validity, proactive lifetime check, HTTP request verb (for example, GET,HEAD, and POST), custom headers, and custom data associated with your HTTP request.
Reference:
https://learn.microsoft.com/en-us/azure/azure-monitor/app/availability