What must be specified for host name determination to work correctly in Dynatrace?

For host name determination to work correctly in Dynatrace, specifying HTTP request headers is essential. This is because HTTP request headers often contain critical information about the environment in which the application is running, including the host name being accessed. When Dynatrace receives requests, it analyzes these headers to accurately identify the source of the request and map it to the appropriate host or service.

Utilizing HTTP request headers allows Dynatrace to derive context from the requests being made, leading to better visibility into the tracked interactions and the origin of web traffic. This capability is vital for monitoring and diagnostics, as it enables Dynatrace to provide precise insights about applications, services, and user experience.

The other options do not directly contribute to the process of determining the host name in the same manner as HTTP request headers do. While operating system details, user credentials, and IP address ranges may provide useful information in other contexts, they do not play a primary role in identifying the host names that users are accessing within Dynatrace.