What command is used to set a custom ingestion port in Dynatrace OneAgent?

The command to set a custom ingestion port in Dynatrace OneAgent is designed to specifically modify the configuration related to how the agent ingests data. The syntax of the command indicates that it is leveraging the capabilities of the OneAgent control tool (oneagentctl) to take an action on the ingestion port, specifically allowing the user to specify a new port number and restart the service to apply this change immediately.

Ingesting data from various sources typically requires a defined port through which the data flows. Using the --set-extensions-ingest-port option explicitly tells the system that you are assigning a new port for data ingestion, which is crucial for customizing network configurations based on your architecture or security policies. The inclusion of the --restart-service flag implies that this command not only sets the new port but also ensures that these settings take effect promptly by restarting relevant services.

The other options focus on retrieving information or tagging hosts rather than modifying the ingestion port, which is why they are not suitable for the purpose of setting a custom port. Thus, the command in the correct answer effectively serves the intended purpose and demonstrates the necessary functionality provided by the OneAgent control tool.