Dynatrace OneAgent is essentially one binary file comprising a set of specialized services that have been configured specifically for your monitoring environment. These services collect metrics on various aspects of your hosts, including hardware, operating system, and application processes. The agent can also monitor specific technologies (Java, Node.js, .NET, and more) in greater detail by injecting itself into those processes and monitoring them from the inside. This provides you with code-level insight into the services that your application relies on.