Which of the following is NOT a built-in report processor with Puppet?

The option indicating IRC as not being a built-in report processor with Puppet is correct because Puppet provides several standard report processors out of the box, each designed to handle notifications and reports generated during Puppet runs. The built-in report processors include log, http, and tagmail.

The log processor serves to record all report information in the Puppet logs, enabling easier tracking and debugging of runs. The http processor allows for sending report data to a specified endpoint through HTTP requests, facilitating integration with external monitoring or alerting systems. The tagmail processor sends out email notifications based on tags present in the reported resources, enhancing notifications for certain critical events.

In contrast, IRC, while it may be used for communication in some contexts, is not a report processor that Puppet natively includes. This distinction is vital for understanding how Puppet manages and processes reports, as each built-in processor has a specific purpose and method for dealing with outgoing report information.