Which of the following is NOT an option for creating templates in vCenter Server?

The choice of "Read only" as the correct answer stems from the functionality and operations associated with creating templates in vCenter Server. In vCenter, templates are primarily designed to facilitate the rapid deployment of virtual machines (VMs) based on pre-configured settings.

When utilizing templates in vCenter, there are various methods such as full clones, linked clones, and specifically, the template clone feature. A full clone creates a complete, independent copy of a VM, while a linked clone relies on the original VM for disk space, allowing for a smaller footprint and faster deployment. The template clone option enables the creation of a template from an existing VM that can then be utilized for further deployments.

In contrast, "Read only" is not a creation option for templates, as it does not represent a method for cloning or creating virtual environments. Instead, templates inherently maintain a state that allows them to be used as blueprints for creating other VMs, rather than having a read-only function. This distinction reinforces the understanding of template management in vCenter and highlights the specific cloning techniques available for effective VM deployment.