Which of the following correctly differentiates Synthetics and RUM?

The correct choice highlights a fundamental difference between Synthetics and Real User Monitoring (RUM) in the context of application performance management. Synthetics refers to monitoring tools that simulate user interactions with an application using automated scripts or bots. These tests are designed to run at regular intervals to measure the responsiveness and availability of the application from various locations or environments, thereby providing synthetic performance metrics.

On the other hand, RUM is focused on capturing data from actual end-users interacting with an application. This means RUM collects performance data and user experience metrics from real interactions, providing insights into how the application performs in the hands of live users.

This distinction is crucial because it illustrates how each tool serves its purpose: Synthetics proactively tests the system and can identify issues before users are affected, while RUM offers insight into real user performance, including variables such as network conditions and user devices, which can't be replicated by bots.

The other choices do not correctly capture the intended context. For instance, APM generally focuses on transaction traces and performance monitoring rather than just frontend or backend specifics, while the assertion about Synthetics not being able to test performance does not hold true, as performance testing is a key feature of Synthetics. Similarly, RUM