Puppet Certified Professional Practice Exam 2025 - Free Puppet Certification Practice Questions and Study Guide

In Puppet, the class that actively runs for a specific certname is determined by the node configuration available in the Puppet manifest. Typically, each node in a Puppet environment is assigned a specific class or classes based on its certname, which is a unique identifier, usually aligned with the hostname of the server it's managing.

In this case, "webserver.mylabserver.com" suggests that the node is set up to function as a web server. The class responsible for web server capabilities is often "apache," which is a widely used web server software. Given that the certname directly indicates the purpose of the node as a web server, it makes sense that the associated configuration would include the "apache" class to ensure that the necessary web server functionalities and settings are applied.

Other classes, such as nginx, varnish, and base, are serving different roles. "nginx" is typically associated with a different web server implementation, while "varnish" is used for caching HTTP reverse proxy situations. The "base" class usually contains general configurations applicable across multiple nodes but may not specifically designate web server functionality. This contextual understanding highlights why "apache" is the most fitting response for the certname in question.