Which layer of a software architecture is primarily targeted by OpenTracing and OpenTelemetry for monitoring and observability?

Which layer of a software architecture is primarily targeted by OpenTracing and OpenTelemetry for monitoring and observability?

• A. Application
• B. Presentation
• C. Middleware
• D. Infrastructure

Answer: (A)

OpenTracing and OpenTelemetry are designed to instrument the code that runs the business logic and handles requests—the application layer. They add instrumentation directly in the application to create traces and collect metrics as operations execute, and to propagate trace context across service boundaries. This provides end-to-end visibility of how requests flow through the system, where latency accumulates, and where errors occur. While you can gather data about middleware interactions or infrastructure-related metrics if you instrument those parts or export telemetry to backends, the primary focus is understanding and observing the application’s behavior. So, the application layer is the best fit.

OpenTracing and OpenTelemetry are designed to instrument the code that runs the business logic and handles requests—the application layer. They add instrumentation directly in the application to create traces and collect metrics as operations execute, and to propagate trace context across service boundaries. This provides end-to-end visibility of how requests flow through the system, where latency accumulates, and where errors occur. While you can gather data about middleware interactions or infrastructure-related metrics if you instrument those parts or export telemetry to backends, the primary focus is understanding and observing the application’s behavior. So, the application layer is the best fit.